3770 lines
167 KiB
HTML
3770 lines
167 KiB
HTML
<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
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p
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pre
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|
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mso-style-link:"HTML Ԥ<><D4A4><EFBFBD>ʽ Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD> Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>1 Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>2 Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>3 Char";
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tt
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{font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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{mso-style-link:"<22><>ע<EFBFBD><D7A2><EFBFBD><EFBFBD> Char";
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{mso-style-link:"<22><>ע<EFBFBD><D7A2><EFBFBD>ı<EFBFBD> Char";
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{mso-style-name:<EFBFBD><EFBFBD>ʽ1;
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span.Char
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{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
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{mso-style-name:ͼ˵<EFBFBD><EFBFBD>;
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span.Char0
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{mso-style-name:"ͼ˵<CDBC><CBB5> Char";
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
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{mso-style-name:<EFBFBD>DZ<EFBFBD><EFBFBD><EFBFBD>1;
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p.a1, li.a1, div.a1
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{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char";
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margin-bottom:.0001pt;
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text-align:center;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.3CharCharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char";
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{mso-style-name:<EFBFBD>ʼ<EFBFBD>post;
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p.3, li.3, div.3
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.3CharChar1CharCharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char1 Char Char Char";
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span.3CharChar1CharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char1 Char Char";
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p.5Char, li.5Char, div.5Char
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char Char";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.5CharChar
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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p.5CharChar0, li.5CharChar0, div.5CharChar0
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char";
|
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char Char";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.5CharCharChar
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char";
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p.5Char0, li.5Char0, div.5Char0
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char";
|
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|
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margin-bottom:.0001pt;
|
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p.5, li.5, div.5
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<EFBFBD><EFBFBD>;
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margin-bottom:.0001pt;
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p.2, li.2, div.2
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2;
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p.20, li.20, div.20
|
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{mso-style-name:ͼ˵<EFBFBD><EFBFBD>2;
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margin-bottom:.0001pt;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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p.21, li.21, div.21
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{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2;
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p.3CharCharCharCharChar, li.3CharCharCharCharChar, div.3CharCharCharCharChar
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char Char";
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|
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span.3CharCharCharCharCharChar
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char Char";
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mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char";
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p.a2, li.a2, div.a2
|
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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p.110, li.110, div.110
|
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{mso-style-name:"<22><>ʽ <20><><EFBFBD><EFBFBD> 1 + <20><><EFBFBD><EFBFBD>1";
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span.1Char
|
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{mso-style-name:"<22><><EFBFBD><EFBFBD> 1 Char";
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mso-style-link:"<22><><EFBFBD><EFBFBD> 1";
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font-weight:bold;}
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p.22, li.22, div.22
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{mso-style-name:"<22><>ʽ <20>б<EFBFBD> 2 + <20><><EFBFBD><EFBFBD>";
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p.23, li.23, div.23
|
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{mso-style-name:<EFBFBD>б<EFBFBD>2;
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p.50, li.50, div.50
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><EFBFBD>;
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margin-bottom:.0001pt;
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p.111, li.111, div.111
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{mso-style-name:<EFBFBD><EFBFBD>ʽ11;
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margin-top:0cm;
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|
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margin-bottom:.0001pt;
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p.12, li.12, div.12
|
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
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p.13, li.13, div.13
|
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{mso-style-name:ͼ˵<EFBFBD><EFBFBD>1;
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margin-bottom:.0001pt;
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p.01, li.01, div.01
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>01;
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p.112, li.112, div.112
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>11;
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p.113, li.113, div.113
|
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{mso-style-name:<EFBFBD>DZ<EFBFBD><EFBFBD><EFBFBD>11;
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margin-top:7.8pt;
|
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|
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p.14, li.14, div.14
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{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
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p.3Char1, li.3Char1, div.3Char1
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char1";
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p.post1, li.post1, div.post1
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{mso-style-name:<EFBFBD>ʼ<EFBFBD>post1;
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p.31, li.31, div.31
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{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>31;
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p.5Char1, li.5Char1, div.5Char1
|
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char1";
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p.5CharChar1, li.5CharChar1, div.5CharChar1
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char1";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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p.5Char10, li.5Char10, div.5Char10
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{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char1";
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margin:0cm;
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margin-bottom:.0001pt;
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text-align:center;
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font-size:9.0pt;
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p.51, li.51, div.51
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|
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|
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|
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|
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|
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|
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{mso-style-name:"<22><><EFBFBD><EFBFBD> 3 Char";
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|
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|
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|
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|
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span.6Char
|
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|
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|
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|
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p.1c, li.1c, div.1c
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|
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/* List Definitions */
|
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|
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|
||
ul
|
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|
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-->
|
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|
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</head>
|
||
|
||
<body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'>
|
||
|
||
<div class=WordSection1 style='layout-grid:15.6pt'>
|
||
|
||
<p class=ab><a name="_Toc53320636"><span style='font-family:<3A><><EFBFBD><EFBFBD>'><EFBFBD><EFBFBD><EFBFBD><EFBFBD></span><span
|
||
lang=EN-US>12-1 linux/fs/buffer.c</span></a></p>
|
||
|
||
<div class=a align=center style='text-align:center'><span lang=EN-US>
|
||
|
||
<hr size=4 width="100%" align=center>
|
||
|
||
</span></div>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>1</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>2</span></u> <b><i> *
|
||
linux/fs/buffer.c</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>3</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>4</span></u> <b><i> *
|
||
(C) 1991 Linus Torvalds</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>5</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>6</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>7</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>8</span></u> <b><i> *
|
||
'buffer.c' implements the buffer-cache functions. Race-conditions have</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>9</span></u> <b><i> *
|
||
been avoided by NEVER letting a interrupt change a buffer (except for the</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>10</span></u> <b><i> *
|
||
data, of course), but instead letting the caller do it. NOTE! As interrupts</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>11</span></u> <b><i> *
|
||
can wake up a caller, some cli-sti sequences are needed to check for</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>12</span></u> <b><i> *
|
||
sleep-on-calls. These should be extremely quick, though (I hope).</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>13</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * 'buffer.c'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>湦<EFBFBD>ܡ<EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD≯ı仺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˾<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣩<EFBFBD><EFBFBD>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϿ<EFBFBD><EFBFBD>Ի<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD><EFBFBD><EFBFBD>˾<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>ָ<EFBFBD><span
|
||
lang=EN-US>cli-sti</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD>ö<EFBFBD>˯<EFBFBD>ߡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>dz<EFBFBD><EFBFBD>ؿ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>14</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>15</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>16</span></u> <b><i> *
|
||
NOTE! There is one discordant note here: checking floppies for</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>17</span></u> <b><i> *
|
||
disk change. This is where it fits best, I think, as it should</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>18</span></u> <b><i> *
|
||
invalidate changed floppy-disk-caches.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>19</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õĵط<EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫʹ<EFBFBD>Ѹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̻<EFBFBD><EFBFBD><EFBFBD>ʧЧ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>20</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>21</span></u>
|
||
#include <stdarg.h> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ժ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>-</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>(va_list)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>(va_start,
|
||
va_arg</span><EFBFBD><EFBFBD><span lang=EN-US>va_end)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
// vsprintf</span><EFBFBD><EFBFBD><span lang=EN-US>vprintf</span><EFBFBD><EFBFBD><span lang=EN-US>vfprintf</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>22</span></u>
|
||
</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>23</span></u>
|
||
#include <linux/config.h> // </span><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ժ<EFBFBD>Ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><span lang=EN-US>HD_TYPE</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>24</span></u>
|
||
#include <linux/sched.h> // </span><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<span lang=EN-US>task_struct</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>úͻ<EFBFBD>ȡ<EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD>ຯ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䡣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>25</span></u>
|
||
#include <linux/kernel.h> // </span><EFBFBD>ں<EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD>ں˳<EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>ζ<EFBFBD><EFBFBD>塣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>26</span></u> #include
|
||
<asm/system.h> // </span>ϵͳͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>/</span><EFBFBD>ж<EFBFBD><EFBFBD>ŵȵ<EFBFBD>Ƕ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ꡣ</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>27</span></u>
|
||
#include <asm/io.h> // io</span>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӳ<EFBFBD><EFBFBD><EFBFBD>˿<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>/</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䡣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>28</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>end</span><EFBFBD><EFBFBD><EFBFBD>ɱ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>ld</span><EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ģ<EFBFBD><EFBFBD>ĩ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>λ<EFBFBD>ã<EFBFBD><EFBFBD>μ<EFBFBD><b><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>!</span>δ<EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD></b><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>Դӱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD> <span lang=EN-US>System.map</span><EFBFBD>ļ<EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD><EFBFBD>λ<EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>33</span><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><span
|
||
lang=EN-US>buffer_wait</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>ߵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD>뻺<EFBFBD><EFBFBD><EFBFBD>ͷ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><span lang=EN-US>b_wait</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳȱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>л<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻᱻ<EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><span
|
||
lang=EN-US>buffer_wait</span>˯<EFBFBD>ߵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>b_wait</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ר<EFBFBD>Ź<EFBFBD><EFBFBD>ȴ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飨<EFBFBD><EFBFBD><span
|
||
lang=EN-US>b_wait</span><EFBFBD><EFBFBD>Ӧ<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õĵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>29</span></u>
|
||
extern int <u><span style='color:blue'>end</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>30</span></u>
|
||
struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>start_buffer</span></u> = (struct <u><span style='color:
|
||
blue'>buffer_head</span></u> *) &<u><span style='color:blue'>end</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>31</span></u>
|
||
struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>hash_table</span></u>[<u><span style='color:blue'>NR_HASH</span></u>];
|
||
// NR_HASH = 307</span><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>32</span></u>
|
||
static struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>free_list</span></u>;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>33</span></u>
|
||
static struct <u><span style='color:blue'>task_struct</span></u> * <u><span
|
||
style='color:blue'>buffer_wait</span></u> = <u><span style='color:blue'>NULL</span></u>;
|
||
// </span><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>ߵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>涨<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>к<EFBFBD><EFBFBD>еĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NR_BUFFERS</span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>linux/fs.h</span>ͷ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>48</span><EFBFBD>еĺ꣬<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>DZ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>nr_buffers</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs.h</span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>172</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊȫ<EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƣ<EFBFBD><span
|
||
lang=EN-US>Linus</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ر<EFBFBD>ʾ</p>
|
||
|
||
<p class=a><span lang=EN-US> // nr_buffers</span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˳<EFBFBD>ʼ<EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>ٸı<EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>buffer_init()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>371</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>34</span></u> int
|
||
<u><span style='color:blue'>NR_BUFFERS</span></u> =
|
||
0; //
|
||
</span>ϵͳ<EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>35</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD>ȴ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>bh</span><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD>̲<EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϵ<EFBFBD>˯<EFBFBD><EFBFBD><EFBFBD>ڸû<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>b_wait</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>н<EFBFBD><EFBFBD>̽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD>ڹر<EFBFBD><EFBFBD>жϣ<EFBFBD><span
|
||
lang=EN-US>cli</span><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD>ȥ˯</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ߵģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>жϡ<EFBFBD><EFBFBD><EFBFBD>Ϊÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̶<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>TSS</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˱<EFBFBD>־<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>EFLAGS</span><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD>ʱ<span lang=EN-US>CPU</span><EFBFBD>е<EFBFBD>ǰ<span
|
||
lang=EN-US>EFLAGS</span><EFBFBD><EFBFBD>ֵҲ<EFBFBD><EFBFBD>֮<EFBFBD>ı䡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ʹ<EFBFBD><EFBFBD><span lang=EN-US>sleep_on()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD>״̬<EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>wake_up()</span><EFBFBD><EFBFBD>ȷ<EFBFBD>ػ<EFBFBD><EFBFBD>ѡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>36</span></u>
|
||
static inline void <u><span style='color:blue'>wait_on_buffer</span></u>(struct
|
||
<u><span style='color:blue'>buffer_head</span></u> * bh)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>37</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>38</span></u>
|
||
<u><span style='color:blue'>cli</span></u>();
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>жϡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>39</span></u>
|
||
while (bh->b_lock)
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̽<EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>ߣ<EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>40</span></u>
|
||
<u><span style='color:blue'>sleep_on</span></u>(&bh->b_wait);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>41</span></u>
|
||
<u><span style='color:blue'>sti</span></u>();
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>жϡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>42</span></u> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>43</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͬ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><span
|
||
lang=EN-US>sync_inodes()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>inode.c</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>59</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>44</span></u> int
|
||
<u><span style='color:blue'>sys_sync</span></u>(void)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>45</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>46</span></u>
|
||
int i;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>47</span></u>
|
||
struct <u><span style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>48</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD>Ȼ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ɨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD>ĵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>е<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>49</span></u>
|
||
<u><span style='color:blue'>sync_inodes</span></u>(); <b><i>/*
|
||
write out inodes into buffers */</i></b> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>50</span></u>
|
||
bh = <u><span style='color:blue'>start_buffer</span></u>;
|
||
// bh</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>51</span></u>
|
||
for (i=0 ; i<<u><span style='color:blue'>NR_BUFFERS</span></u> ; i++,bh++) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>52</span></u>
|
||
<u><span style='color:blue'>wait_on_buffer</span></u>(bh);
|
||
// </span><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>53</span></u>
|
||
if (bh->b_dirt)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>54</span></u>
|
||
<u><span style='color:blue'>ll_rw_block</span></u>(<u><span style='color:blue'>WRITE</span></u>,bh);
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>55</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>56</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>57</span></u> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>58</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<span
|
||
lang=EN-US>dev</span><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>dev</span>ִ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD>д<EFBFBD>̲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>59</span></u> int
|
||
<u><span style='color:blue'>sync_dev</span></u>(int dev)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>60</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>61</span></u>
|
||
int i;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>62</span></u>
|
||
struct <u><span style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>63</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȶԲ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<span
|
||
lang=EN-US>dev</span><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>ߵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>һ<EFBFBD>θû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>鲢<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>b_dirt</span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǾͶ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>д<EFBFBD>̲<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>п<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD>ͷŻ<EFBFBD><EFBFBD>߱<EFBFBD>Ų<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>Ҫ<EFBFBD>ٴ<EFBFBD><EFBFBD>ж<EFBFBD>һ<EFBFBD>¸û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飬</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>64</span></u>
|
||
bh = <u><span style='color:blue'>start_buffer</span></u>;
|
||
// bh</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>65</span></u>
|
||
for (i=0 ; i<<u><span style='color:blue'>NR_BUFFERS</span></u> ; i++,bh++) {
|
||
</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>66</span></u>
|
||
if (bh->b_dev != dev)
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<span lang=EN-US>dev</span><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>67</span></u>
|
||
continue;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>68</span></u>
|
||
<u><span style='color:blue'>wait_on_buffer</span></u>(bh);
|
||
// </span><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>69</span></u>
|
||
if (bh->b_dev == dev && bh->b_dirt)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>70</span></u>
|
||
<u><span style='color:blue'>ll_rw_block</span></u>(<u><span style='color:blue'>WRITE</span></u>,bh);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>71</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ٽ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>塣<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><span lang=EN-US style='color:#333333'>inode_table</span><span
|
||
style='color:#333333'><EFBFBD>е<EFBFBD><span lang=EN-US>inode</span><EFBFBD>뻺<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>Ϣͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>72</span></u>
|
||
<u><span style='color:blue'>sync_inodes</span></u>();</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>ٰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD>ִ<EFBFBD><EFBFBD>Ч<EFBFBD>ʡ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>黺<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ࡰ<EFBFBD><EFBFBD>顱<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD><EFBFBD>Чִ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>73</span></u>
|
||
bh = <u><span style='color:blue'>start_buffer</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>74</span></u>
|
||
for (i=0 ; i<<u><span style='color:blue'>NR_BUFFERS</span></u> ; i++,bh++) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>75</span></u>
|
||
if (bh->b_dev != dev)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>76</span></u>
|
||
continue;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>77</span></u>
|
||
<u><span style='color:blue'>wait_on_buffer</span></u>(bh);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>78</span></u>
|
||
if (bh->b_dev == dev && bh->b_dirt)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>79</span></u>
|
||
<u><span style='color:blue'>ll_rw_block</span></u>(<u><span style='color:blue'>WRITE</span></u>,bh);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>80</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>81</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>82</span></u> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>83</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ʹָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ɨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>鸴λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>84</span></u>
|
||
void inline <u><span style='color:blue'>invalidate_buffers</span></u>(int dev)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>85</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>86</span></u>
|
||
int i;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>87</span></u>
|
||
struct <u><span style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>88</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>89</span></u>
|
||
bh = <u><span style='color:blue'>start_buffer</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>90</span></u>
|
||
for (i=0 ; i<<u><span style='color:blue'>NR_BUFFERS</span></u> ; i++,bh++) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>91</span></u>
|
||
if (bh->b_dev !=
|
||
dev) //
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>92</span></u>
|
||
continue;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>93</span></u>
|
||
<u><span style='color:blue'>wait_on_buffer</span></u>(bh);
|
||
// </span><EFBFBD>ȴ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>й<EFBFBD>˯<EFBFBD>ߵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>һ<EFBFBD>»<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ġ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>94</span></u>
|
||
if (bh->b_dev == dev)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>95</span></u>
|
||
bh->b_uptodate = bh->b_dirt = 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>96</span></u>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>97</span></u> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>98</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>99</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>100</span></u><span
|
||
lang=EN-US> <b><i> * This routine checks whether a floppy has been
|
||
changed, and</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>101</span></u><span
|
||
lang=EN-US> <b><i> * invalidates all buffer-cache-entries in that case.
|
||
This</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>102</span></u><span
|
||
lang=EN-US> <b><i> * is a relatively slow routine, so we have to try to
|
||
minimize using</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>103</span></u><span
|
||
lang=EN-US> <b><i> * it. Thus it is called only upon a 'mount' or 'open'.
|
||
This</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>104</span></u><span
|
||
lang=EN-US> <b><i> * is the best way of combining speed and utility, I
|
||
think.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>105</span></u><span
|
||
lang=EN-US> <b><i> * People changing diskettes in the middle of an
|
||
operation deserve</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>106</span></u><span
|
||
lang=EN-US> <b><i> * to loose :-)</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>107</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>108</span></u><span
|
||
lang=EN-US> <b><i> * NOTE! Although currently this is only for floppies,
|
||
the idea is</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>109</span></u><span
|
||
lang=EN-US> <b><i> * that any additional removable block-device will use
|
||
this routine,</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>110</span></u><span
|
||
lang=EN-US> <b><i> * and that mount/open needn't know that
|
||
floppies/whatever are</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>111</span></u><span
|
||
lang=EN-US> <b><i> * special.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>112</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>'mount'</span><EFBFBD><EFBFBD><span lang=EN-US>'open'</span>ʱ<EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD>ٶȺ<EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>÷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD>ͻᵼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵĶ<EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<span
|
||
lang=EN-US style='font-family:Wingdings'>J</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀǰ<EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD><EFBFBD>Ժ<EFBFBD><EFBFBD>κο<EFBFBD><EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵĿ<EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ø<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>mount/open</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ֪<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʲô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>113</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>check_disk_change</span></u>(int
|
||
dev)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>114</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>115</span></u><span
|
||
lang=EN-US> int i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>116</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD>֧<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD>ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>floppy_change()</span><EFBFBD><EFBFBD><span lang=EN-US>blk_drv/floppy.c</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>139</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>117</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>MAJOR</span></u>(dev) != 2)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>118</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>119</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>floppy_change</span></u>(dev & 0x03))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>120</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŶ<EFBFBD>Ӧ<EFBFBD>豸<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>λͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λͼ<EFBFBD><EFBFBD>ռ<EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>豸<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>121</span></u><span
|
||
lang=EN-US> for (i=0 ; i<<u><span
|
||
style='color:blue'>NR_SUPER</span></u> ; i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>122</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>super_block</span></u>[i].s_dev == dev)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>123</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>put_super</span></u>(<u><span style='color:blue'>super_block</span></u>[i].s_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>124</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>invalidate_inodes</span></u>(dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>125</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>invalidate_buffers</span></u>(dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>126</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>127</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>hash</span><EFBFBD><EFBFBD>ɢ<EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ꡣ</p>
|
||
|
||
<p class=a><span lang=EN-US> // hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǽ<EFBFBD><EFBFBD>ٲ<EFBFBD><EFBFBD>ұȽ<EFBFBD>Ԫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѵ<EFBFBD>ʱ<EFBFBD>䡣ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>صĴ洢λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؼ<EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǾͿ<EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̲<EFBFBD>ѯ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>ء<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD>ɢ<EFBFBD>е<EFBFBD><EFBFBD>κ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ʻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ж<EFBFBD><EFBFBD>֣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>Linux 0.12</span><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˹ؼ<EFBFBD><EFBFBD>ֳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><span lang=EN-US>dev</span><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>block</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>϶<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؼ<EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ؼ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>Ǽ<EFBFBD><EFBFBD><EFBFBD>ؼ<EFBFBD>ֵ<EFBFBD><EFBFBD>һ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٶԹؼ<EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>MOD</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϳ<EFBFBD><EFBFBD>Ա<EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<EFBFBD>ڡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>128</span></u><span
|
||
lang=EN-US> #define <u><span style='color:blue'>_hashfn</span></u>(dev,block)
|
||
(((unsigned)(dev^block))%<u><span style='color:blue'>NR_HASH</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>129</span></u><span
|
||
lang=EN-US> #define <u><span style='color:blue'>hash</span></u>(dev,block) <u><span
|
||
style='color:blue'>hash_table</span></u>[<u><span style='color:blue'>_hashfn</span></u>(dev,block)]</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>130</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD>кͿ<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˫<EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>131</span></u><span
|
||
lang=EN-US> static inline void <u><span style='color:blue'>remove_from_queues</span></u>(struct
|
||
<u><span style='color:blue'>buffer_head</span></u> * bh)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>132</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>133</span></u><span
|
||
lang=EN-US> <b><i>/* remove from hash-queue */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>134</span></u><span
|
||
lang=EN-US> if (bh->b_next)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>135</span></u><span
|
||
lang=EN-US>
|
||
bh->b_next->b_prev = bh->b_prev;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>136</span></u><span
|
||
lang=EN-US> if (bh->b_prev)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>137</span></u><span
|
||
lang=EN-US>
|
||
bh->b_prev->b_next = bh->b_next;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹö<EFBFBD><EFBFBD>е<EFBFBD>ͷһ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD>Ӧ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>138</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>hash</span></u>(bh->b_dev,bh->b_blocknr) == bh)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>139</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>hash</span></u>(bh->b_dev,bh->b_blocknr) =
|
||
bh->b_next;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>140</span></u><span
|
||
lang=EN-US> <b><i>/* remove from free list */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD>ӿ<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>141</span></u><span
|
||
lang=EN-US> if
|
||
(!(bh->b_prev_free) || !(bh->b_next_free))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>142</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"Free block list
|
||
corrupted"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>143</span></u><span
|
||
lang=EN-US>
|
||
bh->b_prev_free->b_next_free = bh->b_next_free;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>144</span></u><span
|
||
lang=EN-US>
|
||
bh->b_next_free->b_prev_free = bh->b_prev_free;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>145</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>free_list</span></u> == bh)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>146</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free_list</span></u> = bh->b_next_free;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>147</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>148</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>149</span></u><span
|
||
lang=EN-US> static inline void <u><span style='color:blue'>insert_into_queues</span></u>(struct
|
||
<u><span style='color:blue'>buffer_head</span></u> * bh)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>150</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>151</span></u><span
|
||
lang=EN-US> <b><i>/* put at end of free list */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD>ڿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩβ<EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>152</span></u><span
|
||
lang=EN-US> bh->b_next_free
|
||
= <u><span style='color:blue'>free_list</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>153</span></u><span
|
||
lang=EN-US> bh->b_prev_free
|
||
= <u><span style='color:blue'>free_list</span></u>->b_prev_free;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>154</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_list</span></u>->b_prev_free->b_next_free = bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>155</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_list</span></u>->b_prev_free = bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>156</span></u><span
|
||
lang=EN-US> <b><i>/* put the buffer in new hash-queue if it has a device */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧһ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ע<EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><span lang=EN-US>hash()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>϶<EFBFBD>Ϊ<span lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˴<EFBFBD>ʱ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>161</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>bh->b_next</span><EFBFBD>϶<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD><span lang=EN-US>163</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>bh->b_next</span><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>NULL</span>ʱ<EFBFBD><EFBFBD><EFBFBD>ܸ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // b_prev</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>bh</span>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>163</span><EFBFBD><EFBFBD>ǰӦ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϡ<EFBFBD><span lang=EN-US>if
|
||
(bh->b_next)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0.96</span><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>157</span></u><span
|
||
lang=EN-US> bh->b_prev = <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>158</span></u><span
|
||
lang=EN-US> bh->b_next = <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>159</span></u><span
|
||
lang=EN-US> if (!bh->b_dev)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>160</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>161</span></u><span
|
||
lang=EN-US> bh->b_next = <u><span
|
||
style='color:blue'>hash</span></u>(bh->b_dev,bh->b_blocknr);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>162</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>hash</span></u>(bh->b_dev,bh->b_blocknr) = bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>163</span></u><span
|
||
lang=EN-US>
|
||
bh->b_next->b_prev = bh; //
|
||
</span><EFBFBD>˾<EFBFBD>ǰӦ<EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><span lang=EN-US>if (bh->b_next)</span><EFBFBD><EFBFBD><EFBFBD>жϡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>164</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>165</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>Ҹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>166</span></u><span
|
||
lang=EN-US> static struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>find_buffer</span></u>(int dev, int block)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>167</span></u><span
|
||
lang=EN-US>
|
||
{
|
||
</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>168</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>169</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>źͿ<EFBFBD>ŵĻ<EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>170</span></u><span
|
||
lang=EN-US> for (tmp = <u><span
|
||
style='color:blue'>hash</span></u>(dev,block) ; tmp != <u><span
|
||
style='color:blue'>NULL</span></u> ; tmp = tmp->b_next)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>171</span></u><span
|
||
lang=EN-US>
|
||
if (tmp->b_dev==dev && tmp->b_blocknr==block)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>172</span></u><span
|
||
lang=EN-US>
|
||
return tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>173</span></u><span
|
||
lang=EN-US> return <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>174</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>175</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>176</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>177</span></u><span
|
||
lang=EN-US> <b><i> * Why like this, I hear you say... The reason is
|
||
race-conditions.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>178</span></u><span
|
||
lang=EN-US> <b><i> * As we don't lock buffers (unless we are readint them,
|
||
that is),</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>179</span></u><span
|
||
lang=EN-US> <b><i> * something might happen to it while we sleep (ie a
|
||
read-error</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>180</span></u><span
|
||
lang=EN-US> <b><i> * will force it bad). This shouldn't really happen
|
||
currently, but</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>181</span></u><span
|
||
lang=EN-US> <b><i> * the code is ready.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>182</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊʲô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>... </span>ԭ<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>ж<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̣<EFBFBD>˯<EFBFBD><EFBFBD>ʱ</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܻᷢ<EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD><EFBFBD>⣨<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¸û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀǰ</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD>ᷢ<EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ըû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؿ<EFBFBD>ͷָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>183</span></u><span
|
||
lang=EN-US> struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>get_hash_table</span></u>(int dev, int block)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>184</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>185</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>186</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>187</span></u><span
|
||
lang=EN-US> for (;;) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>Ҹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>188</span></u><span
|
||
lang=EN-US>
|
||
if (!(bh=<u><span style='color:blue'>find_buffer</span></u>(dev,block)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>189</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ըû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ھ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>190</span></u><span
|
||
lang=EN-US>
|
||
bh->b_count++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>191</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>wait_on_buffer</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>192</span></u><span
|
||
lang=EN-US>
|
||
if (bh->b_dev == dev && bh->b_blocknr == block)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>193</span></u><span
|
||
lang=EN-US>
|
||
return bh;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD>ʱ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ż<EFBFBD><EFBFBD>ŷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˸ı䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>194</span></u><span
|
||
lang=EN-US>
|
||
bh->b_count--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>195</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>196</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>197</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>198</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>199</span></u><span
|
||
lang=EN-US> <b><i> * Ok, this is getblk, and it isn't very clear, again to
|
||
hinder</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>200</span></u><span
|
||
lang=EN-US> <b><i> * race-conditions. Most of the code is seldom used, (ie
|
||
repeating),</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>201</span></u><span
|
||
lang=EN-US> <b><i> * so it should be much more efficient than it looks.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>202</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>203</span></u><span
|
||
lang=EN-US> <b><i> * The algoritm is changed: hopefully better, and an
|
||
elusive bug removed.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>204</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>getblk</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΪҪ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⡣<EFBFBD><EFBFBD><EFBFBD>дִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ȿ<EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>öࡣ</p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>㷨<EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˸ı䣺ϣ<EFBFBD><EFBFBD><EFBFBD>ܸ<EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĥ<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬʱ<EFBFBD>жϻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>205</span></u><span
|
||
lang=EN-US> #define <u><span style='color:blue'>BADNESS</span></u>(bh)
|
||
(((bh)->b_dirt<<1)+(bh)->b_lock)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ȡ<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>źͿ<EFBFBD>ţ<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>豸<EFBFBD>źͿ<EFBFBD>ŵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>206</span></u><span
|
||
lang=EN-US> struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>getblk</span></u>(int dev,int block)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>207</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>208</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * tmp, * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>209</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>210</span></u><span
|
||
lang=EN-US> repeat:</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD>룬<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>211</span></u><span
|
||
lang=EN-US> if (bh = <u><span
|
||
style='color:blue'>get_hash_table</span></u>(dev,block))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>212</span></u><span
|
||
lang=EN-US>
|
||
return bh;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ɨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҿ<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>tmp</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>213</span></u><span
|
||
lang=EN-US> tmp = <u><span
|
||
style='color:blue'>free_list</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>214</span></u><span
|
||
lang=EN-US> do {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>b_count=0</span><EFBFBD>Ŀ飬</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ǰû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õĿ鲻һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹɾ<EFBFBD><EFBFBD>ģ<EFBFBD><span
|
||
lang=EN-US>b_dirt=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><span lang=EN-US>b_lock=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϺ<EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>統һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݺ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ˣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ǹÿ<EFBFBD><span lang=EN-US>b_count
|
||
= 0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>b_lock</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD> <span
|
||
lang=EN-US>breada()</span>Ԥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ֻҪ</p>
|
||
|
||
<p class=a><span lang=EN-US> // ll_rw_block()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD>ݼ<EFBFBD><span
|
||
lang=EN-US>b_count</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӳ<EFBFBD>̷<EFBFBD><EFBFBD>ʲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܻ<EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD>У<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>˴<EFBFBD>ʱ<span lang=EN-US>b_lock=1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>b_count=0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>215</span></u><span
|
||
lang=EN-US>
|
||
if (tmp->b_count)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>216</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>bh</span>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>tmp</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ı<EFBFBD>־<span lang=EN-US>(</span><EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>)</span>Ȩ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><span lang=EN-US>bh</span>ͷ<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD>Ȩ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>bh</span>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>tmp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>tmp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>־<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ϵĿ<EFBFBD>ȡ<EFBFBD>ö<EFBFBD>Ӧ<EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿͼ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ִ<EFBFBD>б<EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܷ<EFBFBD><EFBFBD>ҵ<EFBFBD>һ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>BADNESS()</span><EFBFBD><EFBFBD>С<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>졣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>217</span></u><span
|
||
lang=EN-US>
|
||
if (!bh || <u><span style='color:blue'>BADNESS</span></u>(tmp)<<u><span
|
||
style='color:blue'>BADNESS</span></u>(bh)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>218</span></u><span
|
||
lang=EN-US>
|
||
bh = tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>219</span></u><span
|
||
lang=EN-US>
|
||
if (!<u><span style='color:blue'>BADNESS</span></u>(tmp))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>220</span></u><span
|
||
lang=EN-US>
|
||
break;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>221</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>222</span></u><span
|
||
lang=EN-US> <b><i>/* and repeat until we find something good */</i></b>
|
||
/* </span><EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD>ʺϵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>223</span></u><span
|
||
lang=EN-US> } while ((tmp =
|
||
tmp->b_next_free) != <u><span style='color:blue'>free_list</span></u>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>鷢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>鶼<EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>>0</span><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ȴ<EFBFBD><EFBFBD>п<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̻ᱻ<EFBFBD><EFBFBD>ȷ<EFBFBD>ػ<EFBFBD><EFBFBD>ѡ<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD><EFBFBD>ҿ<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>224</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>225</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>sleep_on</span></u>(&<u><span style='color:
|
||
blue'>buffer_wait</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>226</span></u><span
|
||
lang=EN-US>
|
||
goto repeat;
|
||
// </span><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><span lang=EN-US>210</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>227</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ִ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>Ƚ<EFBFBD><EFBFBD>ʺϵĿ<EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȵȴ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> //</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>߽θû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õĻ<EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ѱ<EFBFBD>ҹ<EFBFBD><EFBFBD>̡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>228</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>wait_on_buffer</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>229</span></u><span
|
||
lang=EN-US> if (bh->b_count)
|
||
// </span><EFBFBD>ֱ<EFBFBD>ռ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>230</span></u><span
|
||
lang=EN-US>
|
||
goto repeat;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD>̣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٴεȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õĻ<EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҹ<EFBFBD><EFBFBD>̡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>231</span></u><span
|
||
lang=EN-US> while
|
||
(bh->b_dirt) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>232</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>sync_dev</span></u>(bh->b_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>233</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>wait_on_buffer</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>234</span></u><span
|
||
lang=EN-US>
|
||
if (bh->b_count)
|
||
// </span><EFBFBD>ֱ<EFBFBD>ռ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>235</span></u><span
|
||
lang=EN-US>
|
||
goto repeat;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>236</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>237</span></u><span
|
||
lang=EN-US> <b><i>/* NOTE!! While we slept waiting for this block, somebody
|
||
else might */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>238</span></u><span
|
||
lang=EN-US> <b><i>/* already have added "this" block to the cache.
|
||
check it */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>˵ȴ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҲҪ<EFBFBD>Դ˽<EFBFBD><EFBFBD>м<EFBFBD>顣<span
|
||
lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD>м<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ϳ<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ǵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٴ<EFBFBD><EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҹ<EFBFBD><EFBFBD>̡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>239</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>find_buffer</span></u>(dev,block))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>240</span></u><span
|
||
lang=EN-US>
|
||
goto repeat;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>241</span></u><span
|
||
lang=EN-US> <b><i>/* OK, FINALLY we know that this buffer is the only one of
|
||
it's kind, */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>242</span></u><span
|
||
lang=EN-US> <b><i>/* and that it's unused (b_count=0), unlocked (b_lock=0), and
|
||
clean */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ψһһ<EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀǰ<EFBFBD><EFBFBD>û<EFBFBD>б<EFBFBD>ռ<EFBFBD><EFBFBD><span
|
||
lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* (b_count=0)</span><EFBFBD><EFBFBD>Ҳδ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(b_lock=0)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹɾ<EFBFBD><EFBFBD>ģ<EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD>ĵģ<EFBFBD><span lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ô˻<EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<span lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>243</span></u><span
|
||
lang=EN-US> bh->b_count=1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>244</span></u><span
|
||
lang=EN-US> bh->b_dirt=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>245</span></u><span
|
||
lang=EN-US> bh->b_uptodate=0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD>кͿ<EFBFBD><EFBFBD>п<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƴ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD>øû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݴ<EFBFBD><EFBFBD>µ<EFBFBD><EFBFBD>豸<EFBFBD>źͿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>շ<EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͷָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>246</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>remove_from_queues</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>247</span></u><span
|
||
lang=EN-US> bh->b_dev=dev;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>248</span></u><span
|
||
lang=EN-US>
|
||
bh->b_blocknr=block;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>249</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>insert_into_queues</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>250</span></u><span
|
||
lang=EN-US> return bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>251</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>252</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD>ͷ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ȴ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݼ<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD>ػ<EFBFBD><EFBFBD>ѵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>̡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>253</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>brelse</span></u>(struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * <u><span style='color:blue'>buf</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>254</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>255</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>buf</span></u>)
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ء<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>256</span></u><span
|
||
lang=EN-US>
|
||
return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>257</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>wait_on_buffer</span></u>(<u><span style='color:blue'>buf</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>258</span></u><span
|
||
lang=EN-US> if (!(<u><span
|
||
style='color:blue'>buf</span></u>->b_count--))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>259</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"Trying to free free
|
||
buffer"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>260</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>wake_up</span></u>(&<u><span style='color:blue'>buffer_wait</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>261</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>262</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>263</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>264</span></u><span
|
||
lang=EN-US> <b><i> * bread() reads a specified block and returns the
|
||
buffer that contains</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>265</span></u><span
|
||
lang=EN-US> <b><i> * it. It returns NULL if the block was unreadable.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>266</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ鲢<EFBFBD><EFBFBD><EFBFBD>غ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ŀ鲻<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ݿ顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><span
|
||
lang=EN-US>dev</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><span lang=EN-US>block</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>黺<EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݾ<EFBFBD>ֱ<EFBFBD>ӷ<EFBFBD><EFBFBD>ظû<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>豸<EFBFBD>ж<EFBFBD>ȡ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ鵽<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>267</span></u><span
|
||
lang=EN-US> struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>bread</span></u>(int dev,int block)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>268</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>269</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>270</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>黺<EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>ں˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD> <20><><EFBFBD><EFBFBD>û<EFBFBD><C3BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ģ<EFBFBD><C4A3>Ѹ<EFBFBD><D1B8>µģ<C2B5><C4A3><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1>ʹ<EFBFBD>ã<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ء<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>271</span></u><span
|
||
lang=EN-US> if (!(bh=<u><span
|
||
style='color:blue'>getblk</span></u>(dev,block)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>272</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"bread: getblk returned
|
||
NULL\n"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>273</span></u><span
|
||
lang=EN-US> if
|
||
(bh->b_uptodate)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>274</span></u><span
|
||
lang=EN-US>
|
||
return bh;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ͵<EFBFBD><EFBFBD>õײ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>д<span
|
||
lang=EN-US>ll_rw_block()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ȴ<EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ݿ鱻<EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѹ<EFBFBD><EFBFBD>£<EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ͷָ<EFBFBD>룬<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>275</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>ll_rw_block</span></u>(<u><span style='color:blue'>READ</span></u>,bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>276</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>wait_on_buffer</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>277</span></u><span
|
||
lang=EN-US> if
|
||
(bh->b_uptodate)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>278</span></u><span
|
||
lang=EN-US>
|
||
return bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>279</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>280</span></u><span
|
||
lang=EN-US> return <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>281</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>282</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>from</span><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>飨<span
|
||
lang=EN-US>1024</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD><span lang=EN-US>to</span>λ<EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>283</span></u><span
|
||
lang=EN-US> #define <u><span style='color:blue'>COPYBLK</span></u>(from,to) \</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>284</span></u><span
|
||
lang=EN-US> __asm__(<i>"cld\n\t"</i> \</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>285</span></u><span
|
||
lang=EN-US> <i>"rep\n\t"</i>
|
||
\</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>286</span></u><span
|
||
lang=EN-US> <i>"movsl\n\t"</i>
|
||
\</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>287</span></u><span
|
||
lang=EN-US> ::<i>"c"</i>
|
||
(<u><span style='color:blue'>BLOCK_SIZE</span></u>/4),<i>"S"</i>
|
||
(from),<i>"D"</i> (to) \</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>288</span></u><span
|
||
lang=EN-US> :<i>"cx"</i>,<i>"di"</i>,<i>"si"</i>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>289</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>290</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>291</span></u><span
|
||
lang=EN-US> <b><i> * bread_page reads four buffers into memory at the
|
||
desired address. It's</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>292</span></u><span
|
||
lang=EN-US> <b><i> * a function of its own, as there is some speed to be
|
||
got by reading them</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>293</span></u><span
|
||
lang=EN-US> <b><i> * all at the same time, not waiting for one to be read,
|
||
and then another</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>294</span></u><span
|
||
lang=EN-US> <b><i> * etc.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>295</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * bread_page</span>һ<EFBFBD>ζ<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>Ϊͬʱ<EFBFBD><EFBFBD>ȡ<EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD>Ի<EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD><EFBFBD>ϵĺô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD>Ŷ<EFBFBD>һ<EFBFBD>飬<EFBFBD>ٶ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD>棨<span
|
||
lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>address</span><EFBFBD>DZ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵĵ<EFBFBD>ַ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>dev</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ţ<EFBFBD><span lang=EN-US>b[4]</span><EFBFBD>Ǻ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>mm/memory.c</span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>do_no_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>386</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>296</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>bread_page</span></u>(unsigned
|
||
long address,int dev,int b[4])</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>297</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>298</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh[4];</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>299</span></u><span
|
||
lang=EN-US> int i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>300</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>4</span><EFBFBD>Σ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>b[]</span><EFBFBD>е<EFBFBD><span lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŵ<EFBFBD><EFBFBD>豸<span
|
||
lang=EN-US>dev</span><EFBFBD>ж<EFBFBD>ȡһҳ<EFBFBD><EFBFBD><EFBFBD>ݷŵ<EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڴ<EFBFBD>λ<EFBFBD><EFBFBD><span lang=EN-US>
|
||
address</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>ڲ<EFBFBD><DAB2><EFBFBD><span lang=EN-US>b[i]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȴӸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD>豸</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ϳ<EFBFBD>ŵĻ<EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD>£<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>ȡ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݿ顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>b[i]</span><EFBFBD><EFBFBD>Ч<EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>b[]</span><EFBFBD>еĿ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<span lang=EN-US>1<EFBFBD><EFBFBD>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>301</span></u><span
|
||
lang=EN-US> for (i=0 ; i<4 ;
|
||
i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>302</span></u><span
|
||
lang=EN-US>
|
||
if (b[i]) {
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>303</span></u><span
|
||
lang=EN-US>
|
||
if (bh[i] = <u><span style='color:blue'>getblk</span></u>(dev,b[i]))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>304</span></u><span
|
||
lang=EN-US>
|
||
if (!bh[i]->b_uptodate)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>305</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>ll_rw_block</span></u>(<u><span style='color:blue'>READ</span></u>,bh[i]);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>306</span></u><span
|
||
lang=EN-US>
|
||
} else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>307</span></u><span
|
||
lang=EN-US>
|
||
bh[i] = <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ƣ<EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ҫ˯<EFBFBD>ߵȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>߹<EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǻ<EFBFBD><EFBFBD><EFBFBD>Ҫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڸ<EFBFBD><EFBFBD><EFBFBD>֮ǰ<EFBFBD>ټ<EFBFBD><EFBFBD>һ<EFBFBD>»<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǻ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ͷŻ<EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>308</span></u><span
|
||
lang=EN-US> for (i=0 ; i<4 ;
|
||
i++,address += <u><span style='color:blue'>BLOCK_SIZE</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>309</span></u><span
|
||
lang=EN-US>
|
||
if (bh[i]) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>310</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>wait_on_buffer</span></u>(bh[i]); // </span><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>311</span></u><span
|
||
lang=EN-US>
|
||
if (bh[i]->b_uptodate) // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ơ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>312</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>COPYBLK</span></u>((unsigned long)
|
||
bh[i]->b_data,address);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>313</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh[i]);
|
||
// </span><EFBFBD>ͷŸû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>314</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>315</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>316</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>317</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>318</span></u><span
|
||
lang=EN-US> <b><i> * Ok, breada can be used as bread, but additionally to
|
||
mark other</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>319</span></u><span
|
||
lang=EN-US> <b><i> * blocks for reading as well. End the argument list
|
||
with a negative</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>320</span></u><span
|
||
lang=EN-US> <b><i> * number.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>321</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * OK</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>breada</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>bread</span>һ<EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD><EFBFBD>һЩ<EFBFBD>顣<EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>Ҫʹ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɱ䣬<EFBFBD><EFBFBD>һϵ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD>š<EFBFBD><EFBFBD>ɹ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>322</span></u><span
|
||
lang=EN-US> struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>breada</span></u>(int dev,int first, ...)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>323</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>324</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>va_list</span></u> args;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>325</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh, *tmp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>326</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ɱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŴӸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ϳ<EFBFBD>ŵĻ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>־δ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>327</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>va_start</span></u>(args,first);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>328</span></u><span
|
||
lang=EN-US> if (!(bh=<u><span
|
||
style='color:blue'>getblk</span></u>(dev,first)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>329</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"bread: getblk returned
|
||
NULL\n"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>330</span></u><span
|
||
lang=EN-US> if
|
||
(!bh->b_uptodate)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>331</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>ll_rw_block</span></u>(<u><span style='color:blue'>READ</span></u>,bh);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD>ȡ<EFBFBD>ɱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD>ע<EFBFBD>⣬<span
|
||
lang=EN-US>336</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><span lang=EN-US>bug</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span
|
||
lang=EN-US>bh</span>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>tmp</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>bug</span>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0.96</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD>вű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ飬ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͼ<EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD><span
|
||
lang=EN-US>337</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݼ<EFBFBD><EFBFBD>ͷŵ<EFBFBD><EFBFBD>ÿ飨<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>getblk()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>332</span></u><span
|
||
lang=EN-US> while ((first=<u><span
|
||
style='color:blue'>va_arg</span></u>(args,int))>=0) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>333</span></u><span
|
||
lang=EN-US>
|
||
tmp=<u><span style='color:blue'>getblk</span></u>(dev,first);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>334</span></u><span
|
||
lang=EN-US>
|
||
if (tmp) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>335</span></u><span
|
||
lang=EN-US>
|
||
if (!tmp->b_uptodate)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>336</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>ll_rw_block</span></u>(<u><span style='color:blue'>READA</span></u>,bh);
|
||
// bh </span>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>tmp</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>337</span></u><span
|
||
lang=EN-US>
|
||
tmp->b_count--;
|
||
// </span><EFBFBD><EFBFBD>ʱ<EFBFBD>ͷŵ<EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>338</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>339</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD>ɱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵȴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD>ػ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // NULL</span><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>340</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>va_end</span></u>(args);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>341</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>wait_on_buffer</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>342</span></u><span
|
||
lang=EN-US> if
|
||
(bh->b_uptodate)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>343</span></u><span
|
||
lang=EN-US>
|
||
return bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>344</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>345</span></u><span
|
||
lang=EN-US> return (<u><span
|
||
style='color:blue'>NULL</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>346</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>347</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>buffer_end</span><EFBFBD>ǻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ĩ<EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ھ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>16MB</span><EFBFBD>ڴ<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>4MB</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>8MB</span><EFBFBD>ڴ<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>2MB</span><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼλ<EFBFBD><EFBFBD><span lang=EN-US>start_buffer</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>buffer_end</span><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>ͬʱ<EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ṹ<EFBFBD>Ͷ<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ顣ֱ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ汻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>348</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>buffer_init</span></u>(long
|
||
buffer_end)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>349</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>350</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * h = <u><span style='color:blue'>start_buffer</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>351</span></u><span
|
||
lang=EN-US> void * b;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>352</span></u><span
|
||
lang=EN-US> int i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>353</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȸ<EFBFBD><EFBFBD>ݲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߶<EFBFBD>λ<EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD>ʵ<EFBFBD>ʻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߶<EFBFBD>λ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>b</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߶˵<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1Mb</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><span lang=EN-US>640KB
|
||
- 1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>ڴ<EFBFBD><EFBFBD><span lang=EN-US> BIOS</span>ռ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ʿ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>߶<EFBFBD>λ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 640KB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>߶<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1MB</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>354</span></u><span
|
||
lang=EN-US> if (buffer_end ==
|
||
1<<20)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>355</span></u><span
|
||
lang=EN-US>
|
||
b = (void *) (640*1024);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>356</span></u><span
|
||
lang=EN-US> else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>357</span></u><span
|
||
lang=EN-US>
|
||
b = (void *) buffer_end;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡϵͳ<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵӻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߶˿<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1KB</span><EFBFBD><EFBFBD>С<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>ͬʱ<EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͷ˽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ľṹ<span lang=EN-US>buffer_head</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<span
|
||
lang=EN-US>buffer_head</span><EFBFBD><EFBFBD><EFBFBD>˫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // h</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ͷ<EFBFBD>ṹ<EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><span
|
||
lang=EN-US>h+1</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><span lang=EN-US>h</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ĩ<EFBFBD><EFBFBD><EFBFBD>⡣Ϊ<EFBFBD>˱<EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD>㹻<EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<span
|
||
lang=EN-US>b</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ <span
|
||
lang=EN-US>>= h</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ĩ<EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD> <span lang=EN-US>>= h+1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>358</span></u><span
|
||
lang=EN-US> while ( (b -= <u><span
|
||
style='color:blue'>BLOCK_SIZE</span></u>) >= ((void *) (h+1)) ) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>359</span></u><span
|
||
lang=EN-US>
|
||
h->b_dev = 0;
|
||
// </span>ʹ<EFBFBD>øû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>360</span></u><span
|
||
lang=EN-US>
|
||
h->b_dirt = 0;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>361</span></u><span
|
||
lang=EN-US>
|
||
h->b_count = 0;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>362</span></u><span
|
||
lang=EN-US>
|
||
h->b_lock = 0;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>363</span></u><span
|
||
lang=EN-US>
|
||
h->b_uptodate = 0; // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>364</span></u><span
|
||
lang=EN-US>
|
||
h->b_wait = <u><span style='color:blue'>NULL</span></u>;
|
||
// </span>ָ<EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD>̡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>365</span></u><span
|
||
lang=EN-US>
|
||
h->b_next = <u><span style='color:blue'>NULL</span></u>;
|
||
// </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<span lang=EN-US>hash</span>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>366</span></u><span
|
||
lang=EN-US>
|
||
h->b_prev = <u><span style='color:blue'>NULL</span></u>;
|
||
// </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<span lang=EN-US>hash</span>ֵ<EFBFBD><EFBFBD>ǰһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>367</span></u><span
|
||
lang=EN-US>
|
||
h->b_data = (char *) b; // </span>ָ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ飨<span
|
||
lang=EN-US>1024</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>368</span></u><span
|
||
lang=EN-US>
|
||
h->b_prev_free = h-1; // </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰһ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>369</span></u><span
|
||
lang=EN-US>
|
||
h->b_next_free = h+1; // </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>370</span></u><span
|
||
lang=EN-US>
|
||
h++;
|
||
// h</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>»<EFBFBD><EFBFBD><EFBFBD>ͷλ<EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>371</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>NR_BUFFERS</span></u>++;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ۼӡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>372</span></u><span
|
||
lang=EN-US>
|
||
if (b == (void *) 0x100000) // </span><EFBFBD><EFBFBD><span lang=EN-US>b</span><EFBFBD>ݼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1MB</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>384KB</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>373</span></u><span
|
||
lang=EN-US>
|
||
b = (void *) 0xA0000; // </span><EFBFBD><EFBFBD><span lang=EN-US>b</span>ָ<EFBFBD><EFBFBD><EFBFBD>ַ<span
|
||
lang=EN-US>0xA0000(640KB)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>374</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>375</span></u><span
|
||
lang=EN-US> h--;
|
||
// </span><EFBFBD><EFBFBD><span lang=EN-US>h</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>376</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_list</span></u> = <u><span style='color:blue'>start_buffer</span></u>;
|
||
// </span><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷָ<EFBFBD><EFBFBD>ͷһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>377</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_list</span></u>->b_prev_free = h; // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>b_prev_free</span>ָ<EFBFBD><EFBFBD>ǰһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>378</span></u><span
|
||
lang=EN-US> h->b_next_free =
|
||
<u><span style='color:blue'>free_list</span></u>;
|
||
// h</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>γ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><span lang=EN-US>hash</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɢ<EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>379</span></u><span
|
||
lang=EN-US> for (i=0;i<<u><span
|
||
style='color:blue'>NR_HASH</span></u>;i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>380</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>hash_table</span></u>[i]=<u><span style='color:
|
||
blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>381</span></u><span
|
||
lang=EN-US> } </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>382</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<div class=a align=center style='text-align:center'><span lang=EN-US>
|
||
|
||
<hr size=4 width="100%" align=center>
|
||
|
||
</span></div>
|
||
|
||
<p class=MsoNormal><span lang=EN-US> </span></p>
|
||
|
||
<p class=MsoNormal><span lang=EN-US> </span></p>
|
||
|
||
</div>
|
||
|
||
</body>
|
||
|
||
</html>
|