2982 lines
117 KiB
HTML
2982 lines
117 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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<meta name=Generator content="Microsoft Word 14 (filtered)">
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<style>
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<!--
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/* Font Definitions */
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@font-face
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{font-family:Wingdings;
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panose-1:5 0 0 0 0 0 0 0 0 0;}
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@font-face
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{font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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@font-face
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{font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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panose-1:2 1 6 9 6 1 1 1 1 1;}
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@font-face
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{font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
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panose-1:2 1 6 9 6 1 1 1 1 1;}
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@font-face
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{font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD>;}
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@font-face
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{font-family:"\@<40><><EFBFBD><EFBFBD>";
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panose-1:2 1 6 9 6 1 1 1 1 1;}
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@font-face
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{font-family:"\@<40><><EFBFBD><EFBFBD>";
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panose-1:2 1 6 0 3 1 1 1 1 1;}
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@font-face
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{font-family:"\@<40><><EFBFBD><EFBFBD>С<EFBFBD><D0A1><EFBFBD>μ<EFBFBD><CEBC><EFBFBD>";}
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/* Style Definitions */
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p.MsoNormal, li.MsoNormal, div.MsoNormal
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{margin:0cm;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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font-size:10.5pt;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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h1
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 1 Char";
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margin-top:17.0pt;
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margin-right:0cm;
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margin-bottom:16.5pt;
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margin-left:7.2pt;
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text-align:center;
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text-indent:-7.2pt;
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page-break-after:avoid;
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font-size:22.0pt;
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font-family:"Times New Roman","serif";
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font-weight:bold;}
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h2
|
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 2 Char";
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margin-top:13.0pt;
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margin-right:0cm;
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margin-bottom:13.0pt;
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margin-left:0cm;
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text-align:justify;
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text-justify:inter-ideograph;
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page-break-after:avoid;
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font-size:16.0pt;
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font-family:"Arial","sans-serif";
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font-weight:bold;}
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h3
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 3 Char";
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margin:0cm;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:0cm;
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page-break-after:avoid;
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font-size:14.0pt;
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font-family:"Arial","sans-serif";
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font-weight:bold;}
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h4
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 4 Char";
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margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:28.8pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-28.8pt;
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page-break-after:avoid;
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font-size:12.0pt;
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font-family:"Arial","sans-serif";
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font-weight:bold;}
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h5
|
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 5 Char";
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margin-top:14.0pt;
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margin-right:0cm;
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margin-bottom:14.5pt;
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margin-left:36.0pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-36.0pt;
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line-height:156%;
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page-break-after:avoid;
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font-size:14.0pt;
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font-family:"Times New Roman","serif";
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font-weight:bold;}
|
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h6
|
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 6 Char";
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margin-top:12.0pt;
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margin-right:0cm;
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margin-bottom:3.2pt;
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margin-left:43.2pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-43.2pt;
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line-height:133%;
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page-break-after:avoid;
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font-size:12.0pt;
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font-family:"Arial","sans-serif";
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font-weight:bold;}
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p.MsoHeading7, li.MsoHeading7, div.MsoHeading7
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 7 Char";
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margin-top:12.0pt;
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margin-right:0cm;
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margin-bottom:3.2pt;
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margin-left:50.4pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-50.4pt;
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line-height:133%;
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page-break-after:avoid;
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font-size:12.0pt;
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font-family:"Times New Roman","serif";
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font-weight:bold;}
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p.MsoHeading8, li.MsoHeading8, div.MsoHeading8
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 8 Char";
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margin-top:12.0pt;
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margin-right:0cm;
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margin-bottom:3.2pt;
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margin-left:57.6pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-72.0pt;
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line-height:133%;
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page-break-after:avoid;
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font-size:12.0pt;
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font-family:"Arial","sans-serif";}
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p.MsoHeading9, li.MsoHeading9, div.MsoHeading9
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{mso-style-link:"<22><><EFBFBD><EFBFBD> 9 Char";
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margin-top:12.0pt;
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margin-right:0cm;
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margin-bottom:3.2pt;
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margin-left:64.8pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-79.2pt;
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line-height:133%;
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page-break-after:avoid;
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font-size:10.0pt;
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font-family:"Arial","sans-serif";}
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p.MsoIndex1, li.MsoIndex1, div.MsoIndex1
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:10.5pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex2, li.MsoIndex2, div.MsoIndex2
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:21.0pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex3, li.MsoIndex3, div.MsoIndex3
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:31.5pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex4, li.MsoIndex4, div.MsoIndex4
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:42.0pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex5, li.MsoIndex5, div.MsoIndex5
|
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:52.5pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex6, li.MsoIndex6, div.MsoIndex6
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:63.0pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex7, li.MsoIndex7, div.MsoIndex7
|
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:73.5pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex8, li.MsoIndex8, div.MsoIndex8
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:84.0pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoIndex9, li.MsoIndex9, div.MsoIndex9
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:94.5pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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text-indent:-10.5pt;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoToc1, li.MsoToc1, div.MsoToc1
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{margin:0cm;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";
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font-weight:bold;}
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p.MsoToc2, li.MsoToc2, div.MsoToc2
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:21.0pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoToc3, li.MsoToc3, div.MsoToc3
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:42.0pt;
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margin-bottom:.0001pt;
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text-align:justify;
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text-justify:inter-ideograph;
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font-size:10.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoToc4, li.MsoToc4, div.MsoToc4
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:31.5pt;
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||
margin-bottom:.0001pt;
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font-size:9.0pt;
|
||
font-family:"Times New Roman","serif";}
|
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p.MsoToc5, li.MsoToc5, div.MsoToc5
|
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:42.0pt;
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margin-bottom:.0001pt;
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font-size:9.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoToc6, li.MsoToc6, div.MsoToc6
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:52.5pt;
|
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margin-bottom:.0001pt;
|
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font-size:9.0pt;
|
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font-family:"Times New Roman","serif";}
|
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p.MsoToc7, li.MsoToc7, div.MsoToc7
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:63.0pt;
|
||
margin-bottom:.0001pt;
|
||
font-size:9.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
p.MsoToc8, li.MsoToc8, div.MsoToc8
|
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:73.5pt;
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margin-bottom:.0001pt;
|
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font-size:9.0pt;
|
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font-family:"Times New Roman","serif";}
|
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p.MsoToc9, li.MsoToc9, div.MsoToc9
|
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{margin-top:0cm;
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margin-right:0cm;
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margin-bottom:0cm;
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margin-left:84.0pt;
|
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margin-bottom:.0001pt;
|
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font-size:9.0pt;
|
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font-family:"Times New Roman","serif";}
|
||
p.MsoFootnoteText, li.MsoFootnoteText, div.MsoFootnoteText
|
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{mso-style-link:"<22><>ע<EFBFBD>ı<EFBFBD> Char";
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margin:0cm;
|
||
margin-bottom:.0001pt;
|
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layout-grid-mode:char;
|
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font-size:9.0pt;
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font-family:"Times New Roman","serif";}
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p.MsoCommentText, li.MsoCommentText, div.MsoCommentText
|
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{mso-style-link:"<22><>ע<EFBFBD><D7A2><EFBFBD><EFBFBD> Char";
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margin:0cm;
|
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margin-bottom:.0001pt;
|
||
font-size:10.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
p.MsoHeader, li.MsoHeader, div.MsoHeader
|
||
{mso-style-link:"ҳü Char";
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
||
text-align:center;
|
||
layout-grid-mode:char;
|
||
border:none;
|
||
padding:0cm;
|
||
font-size:9.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
p.MsoFooter, li.MsoFooter, div.MsoFooter
|
||
{mso-style-link:"ҳ<><D2B3> Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
layout-grid-mode:char;
|
||
font-size:9.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
p.MsoIndexHeading, li.MsoIndexHeading, div.MsoIndexHeading
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ1\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ2";
|
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margin:0cm;
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margin-bottom:.0001pt;
|
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text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
font-size:10.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
p.MsoCaption, li.MsoCaption, div.MsoCaption
|
||
{margin:0cm;
|
||
margin-bottom:.0001pt;
|
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text-align:justify;
|
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text-justify:inter-ideograph;
|
||
font-size:10.0pt;
|
||
font-family:"Arial","sans-serif";}
|
||
p.MsoTof, li.MsoTof, div.MsoTof
|
||
{margin-top:0cm;
|
||
margin-right:0cm;
|
||
margin-bottom:0cm;
|
||
margin-left:42.0pt;
|
||
margin-bottom:.0001pt;
|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
text-indent:-21.0pt;
|
||
font-size:10.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
span.MsoFootnoteReference
|
||
{vertical-align:super;}
|
||
p.MsoList, li.MsoList, div.MsoList
|
||
{margin-top:0cm;
|
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margin-right:0cm;
|
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margin-bottom:0cm;
|
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margin-left:21.0pt;
|
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margin-bottom:.0001pt;
|
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text-align:center;
|
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text-indent:-21.0pt;
|
||
font-size:10.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
p.MsoList2, li.MsoList2, div.MsoList2
|
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{margin:0cm;
|
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margin-bottom:.0001pt;
|
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text-align:justify;
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text-justify:inter-ideograph;
|
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font-size:10.0pt;
|
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font-family:"Times New Roman","serif";}
|
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p.MsoList4, li.MsoList4, div.MsoList4
|
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{margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
font-size:10.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
p.MsoDate, li.MsoDate, div.MsoDate
|
||
{mso-style-link:"<22><><EFBFBD><EFBFBD> Char";
|
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margin-top:0cm;
|
||
margin-right:0cm;
|
||
margin-bottom:0cm;
|
||
margin-left:5.0pt;
|
||
margin-bottom:.0001pt;
|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
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font-size:10.0pt;
|
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font-family:"Times New Roman","serif";}
|
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a:link, span.MsoHyperlink
|
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{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
|
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color:blue;
|
||
text-decoration:underline;}
|
||
a:visited, span.MsoHyperlinkFollowed
|
||
{color:purple;
|
||
text-decoration:underline;}
|
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p
|
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{mso-style-name:"<22><>ͨ\(<28><>վ\)\,<2C><>ͨ \(Web\)\,<2C><>ͨ \(Web\)1\,<2C><>ͨ \(Web\)2\,<2C><>ͨ \(Web\)3";
|
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margin-right:0cm;
|
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margin-left:0cm;
|
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font-size:12.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
pre
|
||
{mso-style-name:"HTML Ԥ<><D4A4><EFBFBD>ʽ\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>1\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>2\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>3";
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|
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|
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|
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|
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|
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span.3CharChar5
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span.2Char
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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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|
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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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|
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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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|
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|
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|
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|
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span.13Char
|
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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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|
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|
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|
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|
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|
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p.36, li.36, div.36
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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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|
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|
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|
||
{mso-style-name:<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>;
|
||
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|
||
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|
||
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|
||
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|
||
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|
||
font-size:10.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
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|
||
{mso-style-name:"<22>ļ<EFBFBD><C4BC><EFBFBD> Char";
|
||
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|
||
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|
||
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|
||
{mso-style-name:ѡ<EFBFBD><EFBFBD>;
|
||
mso-style-link:"ѡ<><D1A1> Char";
|
||
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|
||
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|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
font-size:10.0pt;
|
||
font-family:"Times New Roman","serif";}
|
||
span.Char5
|
||
{mso-style-name:"ѡ<><D1A1> Char";
|
||
mso-style-link:ѡ<EFBFBD><EFBFBD>;
|
||
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|
||
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|
||
{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
mso-style-link:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
||
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|
||
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|
||
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|
||
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|
||
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|
||
font-family:"Times New Roman","serif";}
|
||
span.Char6
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
||
mso-style-link:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
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|
||
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|
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
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mso-style-link:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
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|
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|
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|
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|
||
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|
||
font-family:"Times New Roman","serif";}
|
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span.Char7
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
||
mso-style-link:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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p.af8, li.af8, div.af8
|
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{mso-style-name:<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
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|
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|
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|
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|
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|
||
font-family:"Times New Roman","serif";}
|
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span.Char8
|
||
{mso-style-name:"<22>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD> Char";
|
||
mso-style-link:<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-family:"Times New Roman","serif";}
|
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p.af9, li.af9, div.af9
|
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{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
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|
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|
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|
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|
||
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|
||
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|
||
font-family:"Times New Roman","serif";}
|
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span.Char9
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
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mso-style-link:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
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|
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p.58, li.58, div.58
|
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|
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|
||
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|
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|
||
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|
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p.59, li.59, div.59
|
||
{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<EFBFBD>ſ<EFBFBD><EFBFBD><EFBFBD>;
|
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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><>ʽ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> + <20><><EFBFBD>\: 9\.26 <20><><EFBFBD><EFBFBD>";
|
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|
||
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|
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|
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|
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|
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span.5Char4
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD> 5 Char";
|
||
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|
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font-weight:bold;}
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span.6Char0
|
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{mso-style-name:"<22><><EFBFBD><EFBFBD> 6 Char";
|
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mso-style-link:"<22><><EFBFBD><EFBFBD> 6";
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font-weight:bold;}
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span.7Char
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{mso-style-name:"<22><><EFBFBD><EFBFBD> 7 Char";
|
||
mso-style-link:"<22><><EFBFBD><EFBFBD> 7";
|
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font-weight:bold;}
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span.8Char
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD> 8 Char";
|
||
mso-style-link:"<22><><EFBFBD><EFBFBD> 8";
|
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font-family:"Arial","sans-serif";}
|
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span.9Char
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD> 9 Char";
|
||
mso-style-link:"<22><><EFBFBD><EFBFBD> 9";
|
||
font-family:"Arial","sans-serif";}
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span.Chara
|
||
{mso-style-name:"<22><>ע<EFBFBD>ı<EFBFBD> Char";
|
||
mso-style-link:<EFBFBD><EFBFBD>ע<EFBFBD>ı<EFBFBD>;
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|
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{mso-style-name:"<22><>ע<EFBFBD><D7A2><EFBFBD><EFBFBD> Char";
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.Charc
|
||
{mso-style-name:"ҳü Char";
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||
mso-style-link:ҳü;
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||
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span.Chard
|
||
{mso-style-name:"ҳ<><D2B3> Char";
|
||
mso-style-link:ҳ<EFBFBD><EFBFBD>;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.Chare
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD> Char";
|
||
mso-style-link:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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span.HTMLChar
|
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{mso-style-name:"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";
|
||
mso-style-link:"HTML Ԥ<><D4A4><EFBFBD>ʽ\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>1\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>2\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>3";
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
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span.Charf
|
||
{mso-style-name:"<22><>ע<EFBFBD><D7A2><EFBFBD><EFBFBD> Char";
|
||
mso-style-link:<EFBFBD><EFBFBD>ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-weight:bold;}
|
||
span.Charf0
|
||
{mso-style-name:"<22><>ע<EFBFBD><D7A2><EFBFBD>ı<EFBFBD> Char";
|
||
mso-style-link:<EFBFBD><EFBFBD>ע<EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
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|
||
{font-size:10.0pt;}
|
||
/* Page Definitions */
|
||
@page WordSection1
|
||
{size:595.3pt 841.9pt;
|
||
margin:72.0pt 54.0pt 72.0pt 54.0pt;
|
||
layout-grid:15.6pt;}
|
||
div.WordSection1
|
||
{page:WordSection1;}
|
||
/* List Definitions */
|
||
ol
|
||
{margin-bottom:0cm;}
|
||
ul
|
||
{margin-bottom:0cm;}
|
||
-->
|
||
</style>
|
||
|
||
</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="_Toc56863289"></a><a name="_Toc53320697"><span
|
||
style='font-family:<3A><><EFBFBD><EFBFBD>'><EFBFBD><EFBFBD><EFBFBD><EFBFBD></span><span lang=EN-US>15-7 linux/lib/malloc.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> *
|
||
malloc.c --- a general purpose kernel memory allocator for Linux.</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> *
|
||
Written by Theodore Ts'o (tytso@mit.edu), 11/29/91</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> <b><i> *
|
||
This routine is written to be as fast as possible, so that it</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>7</span></u> <b><i> *
|
||
can be called from the interrupt level.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>8</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>9</span></u> <b><i> *
|
||
Limitations: maximum size of memory we can allocate using this routine</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>10</span></u> <b><i> *
|
||
is 4k, the size of a page in Linux.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>11</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>12</span></u> <b><i> *
|
||
The general game plan is that each page (called a bucket) will only hold</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>13</span></u> <b><i> *
|
||
objects of a given size. When all of the object on a page are released,</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>14</span></u> <b><i> *
|
||
the page can be returned to the general free pool. When malloc() is</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>15</span></u> <b><i> *
|
||
called, it looks for the smallest bucket size which will fulfill its</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>16</span></u> <b><i> *
|
||
request, and allocate a piece of memory from that bucket pool.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>17</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>18</span></u> <b><i> *
|
||
Each bucket has as its control block a bucket descriptor which keeps </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>19</span></u> <b><i> *
|
||
track of how many objects are in use on that page, and the free list</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>20</span></u> <b><i> *
|
||
for that page. Like the buckets themselves, bucket descriptors are</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>21</span></u> <b><i> *
|
||
stored on pages requested from get_free_page(). However, unlike buckets,</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>22</span></u> <b><i> *
|
||
pages devoted to bucket descriptor pages are never released back to the</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>23</span></u> <b><i> *
|
||
system. Fortunately, a system should probably only need 1 or 2 bucket</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>24</span></u> <b><i> *
|
||
descriptor pages, since a page can hold 256 bucket descriptors (which</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>25</span></u> <b><i> *
|
||
corresponds to 1 megabyte worth of bucket pages.) If the kernel is using </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>26</span></u> <b><i> *
|
||
that much allocated memory, it's probably doing something wrong. :-)</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>27</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>28</span></u> <b><i> *
|
||
Note: malloc() and free() both call get_free_page() and free_page()</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>29</span></u> <b><i> *
|
||
in sections of code where interrupts are turned off, to allow</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>30</span></u> <b><i> *
|
||
malloc() and free() to be safely called from an interrupt routine.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>31</span></u> <b><i> *
|
||
(We will probably need this functionality when networking code,</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>32</span></u> <b><i> *
|
||
particularily things like NFS, is added to Linux.) However, this</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>33</span></u> <b><i> *
|
||
presumes that get_free_page() and free_page() are interrupt-level</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>34</span></u> <b><i> *
|
||
safe, which they may not be once paging is added. If this is the</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>35</span></u> <b><i> *
|
||
case, we will need to modify malloc() to keep a few unused pages</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>36</span></u> <b><i> *
|
||
"pre-allocated" so that it can safely draw upon those pages if</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>37</span></u> <b><i> *
|
||
it is called from an interrupt routine.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>38</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>39</span></u> <b><i> *
|
||
Another concern is that get_free_page() should not sleep; if it </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>40</span></u> <b><i> *
|
||
does, the code is carefully ordered so as to avoid any race </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>41</span></u> <b><i> *
|
||
conditions. The catch is that if malloc() is called re-entrantly, </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>42</span></u> <b><i> *
|
||
there is a chance that unecessary pages will be grabbed from the </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>43</span></u> <b><i> *
|
||
system. Except for the pages for the bucket descriptor page, the </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>44</span></u> <b><i> *
|
||
extra pages will eventually get released back to the system, though,</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>45</span></u> <b><i> *
|
||
so it isn't all that bad.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>46</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>47</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * malloc.c
|
||
- Linux</span><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>亯<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>Theodore Ts'o</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> (tytso@mit.edu), 11/29/91</span></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܵؿ죬<EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>жϲ<EFBFBD><EFBFBD><EFBFBD>ô˺<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>ƣ<EFBFBD>ʹ<EFBFBD>øú<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>4k</span><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><span lang=EN-US>Linux</span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>Ĵ<EFBFBD>С<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>д<EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿҳ<span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊһ<EFBFBD><EFBFBD><EFBFBD>洢Ͱ<span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ɶ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>С<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>һҳ<EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷź<EFBFBD>ҳ<EFBFBD>Ϳ<EFBFBD><EFBFBD>Է<EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ء<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>malloc()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD>Ĵ洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӹô洢Ͱ<EFBFBD>з<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ڴ档</p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ÿ<EFBFBD><EFBFBD><EFBFBD>洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õĴ洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>м<EFBFBD>¼<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD>ٶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ʹ<EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>Ͽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD>Ǵ洢<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * get_free_page()</span><EFBFBD><EFBFBD><EFBFBD>뵽<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>ϵģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢Ͱ<EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD>ͷŸ<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD>Լֻ<EFBFBD><EFBFBD>Ҫ<span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><span lang=EN-US>2</span>ҳ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD>Ϊһ</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>256</span><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>(</span><EFBFBD><EFBFBD>Ӧ<span lang=EN-US>1MB</span><EFBFBD>ڴ<EFBFBD>Ĵ洢Ͱҳ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳΪͰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD>ô<EFBFBD>϶<EFBFBD>ϵͳʲô<EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><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>⣡<span
|
||
lang=EN-US>malloc()</span><EFBFBD><EFBFBD><span lang=EN-US>free()</span><EFBFBD><EFBFBD><EFBFBD>߹ر<EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϵĴ<EFBFBD><EFBFBD>벿<EFBFBD>ֶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>get_free_page()</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* free_page()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<span lang=EN-US>malloc()</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>free()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȫ<EFBFBD>ر<EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* (</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NFS</span><EFBFBD>ȱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵽<span
|
||
lang=EN-US>Linux</span><EFBFBD><EFBFBD>ʱ<EFBFBD>Ϳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ֹ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ</p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD>Ǽ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>get_free_page()</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>free_page()</span><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD>ȫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õģ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˷<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD>Ϳ<EFBFBD><EFBFBD>ܲ<EFBFBD><EFBFBD>ǰ<EFBFBD>ȫ<EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><span lang=EN-US>malloc()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD>ȷ<EFBFBD><EFBFBD>䡱<EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD>ڴ棬<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>malloc()</span><EFBFBD><EFBFBD><span lang=EN-US>free()</span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>Ϳ<EFBFBD><EFBFBD><EFBFBD>ȫ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>get_free_page()</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>˯<EFBFBD>ߣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>ߵĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>˷<EFBFBD>ֹ</p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD>κξ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ϸ<EFBFBD>ذ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD> <20>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>malloc()</span><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ҳ<EFBFBD>汻<EFBFBD><EFBFBD>ϵͳ<EFBFBD><EFBFBD>ȡ<EFBFBD>ߵĻ<EFBFBD><EFBFBD>ᡣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ջ<EFBFBD><EFBFBD>ͷŸ<EFBFBD>ϵͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Բ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>á<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>48</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'>49</span></u>
|
||
#include <linux/mm.h> // </span><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩҳ<EFBFBD><EFBFBD><EFBFBD>ͷź<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>50</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>ʽ<EFBFBD><EFBFBD><EFBFBD>ꡣ</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>51</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>52</span></u>
|
||
struct <u><span style='color:blue'>bucket_desc</span></u> { <b><i>/*
|
||
16 bytes */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>53</span></u>
|
||
void
|
||
*page; // </span><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>54</span></u>
|
||
struct <u><span style='color:blue'>bucket_desc</span></u>
|
||
*next; // </span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>55</span></u>
|
||
void
|
||
*freeptr; // </span>ָ<EFBFBD><EFBFBD>Ͱ<EFBFBD>п<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>λ<EFBFBD>õ<EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>56</span></u>
|
||
unsigned short refcnt;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>57</span></u>
|
||
unsigned short
|
||
bucket_size; // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>洢Ͱ<EFBFBD>Ĵ<EFBFBD>С<EFBFBD><EFBFBD></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> <u><span style='color:blue'>59</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ṹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>60</span></u>
|
||
struct <u><span style='color:blue'>_bucket_dir</span></u> { <b><i>/*
|
||
8 bytes */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>61</span></u>
|
||
int
|
||
size; // </span><EFBFBD>ô洢Ͱ<EFBFBD>Ĵ<EFBFBD>С<span lang=EN-US>(</span><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>62</span></u>
|
||
struct <u><span style='color:blue'>bucket_desc</span></u>
|
||
*chain; // </span><EFBFBD>ô洢ͰĿ¼<EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</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> <u><span style='color:blue'>64</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>65</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>66</span></u> <b><i> *
|
||
The following is the where we store a pointer to the first bucket</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>67</span></u> <b><i> *
|
||
descriptor for a given size. </i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>68</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>69</span></u> <b><i> *
|
||
If it turns out that the Linux kernel allocates a lot of objects of a</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>70</span></u> <b><i> *
|
||
specific size, then we may want to add that specific size to this list,</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>71</span></u> <b><i> *
|
||
since that will allow the memory to be allocated more efficiently.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>72</span></u> <b><i> *
|
||
However, since an entire page must be dedicated to each specific size</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>73</span></u> <b><i> *
|
||
on this list, some amount of temperance must be exercised here.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>74</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>75</span></u> <b><i> *
|
||
Note that this list *must* be kept in order.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>76</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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD>ŵ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD>洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ĵط<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>Linux</span><EFBFBD>ں˷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>С<EFBFBD>ӵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ڴ<EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǣ<EFBFBD><EFBFBD><EFBFBD>Ϊһҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD>Բ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>洢ͰĿ¼<EFBFBD>б<EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>77</span></u>
|
||
struct <u><span style='color:blue'>_bucket_dir</span></u> <u><span
|
||
style='color:blue'>bucket_dir</span></u>[] = {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>78</span></u>
|
||
{ 16, (struct <u><span style='color:blue'>bucket_desc</span></u> *)
|
||
0}, // 16</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>79</span></u>
|
||
{ 32, (struct <u><span style='color:blue'>bucket_desc</span></u> *)
|
||
0}, // 32</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>80</span></u>
|
||
{ 64, (struct <u><span style='color:blue'>bucket_desc</span></u> *)
|
||
0}, // 64</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>81</span></u>
|
||
{ 128, (struct <u><span style='color:blue'>bucket_desc</span></u> *) 0},
|
||
// 128</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>82</span></u>
|
||
{ 256, (struct <u><span style='color:blue'>bucket_desc</span></u> *) 0},
|
||
// 256</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>83</span></u>
|
||
{ 512, (struct <u><span style='color:blue'>bucket_desc</span></u> *) 0},
|
||
// 512</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>84</span></u>
|
||
{ 1024, (struct <u><span style='color:blue'>bucket_desc</span></u> *) 0},
|
||
// 1024</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>85</span></u>
|
||
{ 2048, (struct <u><span style='color:blue'>bucket_desc</span></u> *) 0},
|
||
// 2048</span><EFBFBD>ֽڳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>顣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>86</span></u>
|
||
{ 4096, (struct <u><span style='color:blue'>bucket_desc</span></u> *) 0},
|
||
// 4096</span><EFBFBD>ֽ<EFBFBD><span lang=EN-US>(1</span>ҳ<span lang=EN-US>)</span><EFBFBD>ڴ档</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>87</span></u>
|
||
{ 0, (struct <u><span style='color:blue'>bucket_desc</span></u>
|
||
*) 0}}; <b><i>/* End of list marker */</i></b></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> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>90</span></u> <b><i> *
|
||
This contains a linked list of free bucket descriptor blocks</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>91</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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǻ<EFBFBD><EFBFBD>п<EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<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'>92</span></u>
|
||
struct <u><span style='color:blue'>bucket_desc</span></u> *<u><span
|
||
style='color:blue'>free_bucket_desc</span></u> = (struct <u><span
|
||
style='color:blue'>bucket_desc</span></u> *) 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>93</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>94</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>95</span></u> <b><i> *
|
||
This routine initializes a bucket description page.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>96</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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD>ʼ<EFBFBD><EFBFBD>һҳͰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>档</p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>free_bucket_desc</span>ָ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>97</span></u>
|
||
static inline void <u><span style='color:blue'>init_bucket_desc</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>
|
||
struct <u><span style='color:blue'>bucket_desc</span></u> *bdesc, *first;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>100</span></u><span
|
||
lang=EN-US>
|
||
int i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>101</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD>ڴ棬<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>ڴ治<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>102</span></u><span
|
||
lang=EN-US> first = bdesc =
|
||
(struct <u><span style='color:blue'>bucket_desc</span></u> *) <u><span
|
||
style='color:blue'>get_free_page</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>103</span></u><span
|
||
lang=EN-US> if (!bdesc)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>104</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"Out of memory in
|
||
init_bucket_desc()"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD>һҳ<EFBFBD>ڴ<EFBFBD><EFBFBD>пɴ<EFBFBD>ŵ<EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>佨<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>105</span></u><span
|
||
lang=EN-US> for (i = <u><span
|
||
style='color:blue'>PAGE_SIZE</span></u>/sizeof(struct <u><span
|
||
style='color:blue'>bucket_desc</span></u>); i > 1; i--) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>106</span></u><span
|
||
lang=EN-US>
|
||
bdesc->next = bdesc+1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>107</span></u><span
|
||
lang=EN-US>
|
||
bdesc++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>108</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>109</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>110</span></u><span
|
||
lang=EN-US> <b><i> * This
|
||
is done last, to avoid race conditions in case </i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>111</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
get_free_page() sleeps and this routine gets called again....</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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>get_free_page()</span>˯<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ľ<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> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>free_bucket_desc</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>113</span></u><span
|
||
lang=EN-US> bdesc->next = <u><span
|
||
style='color:blue'>free_bucket_desc</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>114</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>free_bucket_desc</span></u> = first;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>115</span></u><span
|
||
lang=EN-US> }</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>䶯̬<EFBFBD>ڴ溯<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>len
|
||
- </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>鳤<EFBFBD>ȡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>117</span></u><span
|
||
lang=EN-US> void *<u><span style='color:blue'>malloc</span></u>(unsigned int
|
||
len)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>118</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>119</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>_bucket_dir</span></u> *bdir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>120</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>bucket_desc</span></u> *bdesc;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>121</span></u><span
|
||
lang=EN-US>
|
||
void
|
||
*retval;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>122</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>123</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>124</span></u><span
|
||
lang=EN-US> <b><i> * First
|
||
we search the bucket_dir to find the right bucket change</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>125</span></u><span
|
||
lang=EN-US> <b><i> * for
|
||
this request.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>126</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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢ͰĿ¼<span lang=EN-US>bucket_dir</span><EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD><EFBFBD>ʺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD>С<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>洢ͰĿ¼<EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD><EFBFBD>ʺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ͱ<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><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD>˶<EFBFBD>Ӧ<EFBFBD><EFBFBD>ͰĿ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>127</span></u><span
|
||
lang=EN-US> for (bdir = <u><span
|
||
style='color:blue'>bucket_dir</span></u>; bdir->size; bdir++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>128</span></u><span
|
||
lang=EN-US>
|
||
if (bdir->size >= len)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>129</span></u><span
|
||
lang=EN-US>
|
||
break;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʴ<EFBFBD>С<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>С̫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˸<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD>Ϊ<span lang=EN-US>1</span><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>130</span></u><span
|
||
lang=EN-US> if (!bdir->size)
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>131</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>printk</span></u>(<i>"malloc called with impossibly
|
||
large argument (%d)\n"</i>,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>132</span></u><span
|
||
lang=EN-US>
|
||
len);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>133</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"malloc: bad arg"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>134</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>135</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>136</span></u><span
|
||
lang=EN-US> <b><i> * Now
|
||
we search for a bucket descriptor which has free space</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>137</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><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD>пռ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>138</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>cli</span></u>(); <b><i>/* Avoid race conditions */</i></b>
|
||
/* </span>Ϊ<EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȹ<EFBFBD><EFBFBD>ж<EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӦͰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҿ<EFBFBD><EFBFBD>п<EFBFBD><EFBFBD>пռ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // freeptr</span><EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>139</span></u><span
|
||
lang=EN-US> for (bdesc =
|
||
bdir->chain; bdesc; bdesc = bdesc->next) </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>140</span></u><span
|
||
lang=EN-US>
|
||
if (bdesc->freeptr)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>141</span></u><span
|
||
lang=EN-US>
|
||
break;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>142</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>143</span></u><span
|
||
lang=EN-US> <b><i> * If we
|
||
didn't find a bucket with free space, then we'll </i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>144</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
allocate a new one.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>145</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>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD>пռ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD>Ҫ<EFBFBD>½<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>146</span></u><span
|
||
lang=EN-US> if (!bdesc) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>147</span></u><span
|
||
lang=EN-US>
|
||
char *cp;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>148</span></u><span
|
||
lang=EN-US>
|
||
int i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>149</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>free_bucket_desc</span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>һ<EFBFBD>ε<EFBFBD><EFBFBD>øó<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ꡣ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ҳ<EFBFBD>沢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>free_bucket_desc</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>һ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>150</span></u><span
|
||
lang=EN-US>
|
||
if (!<u><span style='color:blue'>free_bucket_desc</span></u>) </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>151</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>init_bucket_desc</span></u>();</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ȡ<span lang=EN-US>free_bucket_desc</span>ָ<EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>free_bucket_desc</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>152</span></u><span
|
||
lang=EN-US>
|
||
bdesc = <u><span style='color:blue'>free_bucket_desc</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>153</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free_bucket_desc</span></u> = bdesc->next;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD>Ͱ<EFBFBD>Ĵ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD>ӦͰĿ¼<EFBFBD>Ĵ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棬</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>page</span>ָ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ָ<EFBFBD><EFBFBD>Ҳָ<EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ʱȫΪ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>154</span></u><span
|
||
lang=EN-US>
|
||
bdesc->refcnt = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>155</span></u><span
|
||
lang=EN-US> bdesc->bucket_size
|
||
= bdir->size;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>156</span></u><span
|
||
lang=EN-US>
|
||
bdesc->page = bdesc->freeptr = (void *) cp = <u><span style='color:blue'>get_free_page</span></u>();</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><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>
|
||
if (!cp)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>158</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"Out of memory in kernel
|
||
malloc()"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>159</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/* Set up the chain of free objects */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
/* </span><EFBFBD>ڸ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>н<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ը<EFBFBD>ͰĿ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD>СΪ<EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD>Ը<EFBFBD>ҳ<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>л<EFBFBD><EFBFBD>֣<EFBFBD><EFBFBD><EFBFBD>ʹÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD>ʼ<span
|
||
lang=EN-US>4</span><EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>160</span></u><span
|
||
lang=EN-US>
|
||
for (i=<u><span style='color:blue'>PAGE_SIZE</span></u>/bdir->size; i >
|
||
1; i--) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>161</span></u><span
|
||
lang=EN-US>
|
||
*((char **) cp) = cp + bdir->size;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>162</span></u><span
|
||
lang=EN-US>
|
||
cp += bdir->size;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>163</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0(NULL)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ӦͰĿ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>chain</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͰĿ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // chain</span>ָ<EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>164</span></u><span
|
||
lang=EN-US>
|
||
*((char **) cp) = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>165</span></u><span
|
||
lang=EN-US>
|
||
bdesc->next = bdir->chain; <b><i>/* OK, link it in! */</i></b>
|
||
/* OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>룡<span lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>166</span></u><span
|
||
lang=EN-US>
|
||
bdir->chain = bdesc;</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><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>뼴<EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧҳ<EFBFBD><EFBFBD>ĵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>пռ<EFBFBD>ָ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ӧҳ<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>168</span></u><span
|
||
lang=EN-US> retval = (void *)
|
||
bdesc->freeptr;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>169</span></u><span
|
||
lang=EN-US> bdesc->freeptr =
|
||
*((void **) retval);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>170</span></u><span
|
||
lang=EN-US> bdesc->refcnt++;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>171</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>sti</span></u>(); <b><i>/* OK, we're safe again */</i></b>
|
||
/* OK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ְ<EFBFBD>ȫ<EFBFBD><EFBFBD><span lang=EN-US>*/</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>172</span></u><span
|
||
lang=EN-US> return(retval);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>173</span></u><span
|
||
lang=EN-US> }</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> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>176</span></u><span
|
||
lang=EN-US> <b><i> * Here is the free routine. If you know the size
|
||
of the object that you</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>177</span></u><span
|
||
lang=EN-US> <b><i> * are freeing, then free_s() will use that information
|
||
to speed up the</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>178</span></u><span
|
||
lang=EN-US> <b><i> * search for the bucket descriptor.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>179</span></u><span
|
||
lang=EN-US> <b><i> * </i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>180</span></u><span
|
||
lang=EN-US> <b><i> * We will #define a macro so that "free(x)"
|
||
is becomes "free_s(x, 0)"</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>181</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><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD><EFBFBD>ͷŶ<EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>free_s()</span><EFBFBD><EFBFBD>ʹ<EFBFBD>ø<EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD>ӦͰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٶȡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>꣬ʹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>"free(x)"</span><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>"free_s(x,
|
||
0)"</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD>ͷŴ洢Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>obj
|
||
- </span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룻<span lang=EN-US>size - </span><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>182</span></u><span
|
||
lang=EN-US> void <u><span style='color:blue'>free_s</span></u>(void *obj, int
|
||
size)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>183</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>184</span></u><span
|
||
lang=EN-US>
|
||
void *page;</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'>_bucket_dir</span></u> *bdir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>186</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>bucket_desc</span></u> *bdesc,
|
||
*prev;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>187</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>188</span></u><span
|
||
lang=EN-US> <b><i>/* Calculate
|
||
what page this object lives in */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>ҳ<EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>189</span></u><span
|
||
lang=EN-US> page = (void
|
||
*) ((unsigned long) obj & 0xfffff000);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>190</span></u><span
|
||
lang=EN-US> <b><i>/* Now search
|
||
the buckets looking for that page */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
/* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢ͰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>Ҹ<EFBFBD>ҳ<EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>191</span></u><span
|
||
lang=EN-US> for (bdir = <u><span
|
||
style='color:blue'>bucket_dir</span></u>; bdir->size; bdir++) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>192</span></u><span
|
||
lang=EN-US>
|
||
prev = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>193</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/* If size is zero then this conditional is always false */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
/* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>size</span><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>϶<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>false */ </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>194</span></u><span
|
||
lang=EN-US>
|
||
if (bdir->size < size)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>195</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҷ<EFBFBD>Ӧҳ<EFBFBD>档<EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>page</span><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>ҵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><span
|
||
lang=EN-US>found</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ӧ<span lang=EN-US>page</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>prev</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>196</span></u><span
|
||
lang=EN-US>
|
||
for (bdesc = bdir->chain; bdesc; bdesc = bdesc->next) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>197</span></u><span
|
||
lang=EN-US>
|
||
if (bdesc->page == page) </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>198</span></u><span
|
||
lang=EN-US>
|
||
goto
|
||
found;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>199</span></u><span
|
||
lang=EN-US>
|
||
prev = bdesc;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>200</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>201</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˶<EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>202</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>panic</span></u>(<i>"Bad address passed to kernel
|
||
free_s()"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>203</span></u><span
|
||
lang=EN-US> found:</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȹ<EFBFBD><EFBFBD>жϡ<EFBFBD>Ȼ<EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>204</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>cli</span></u>(); <b><i>/* To avoid race conditions */</i></b>
|
||
/* </span>Ϊ<EFBFBD>˱<EFBFBD><EFBFBD>⾺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>205</span></u><span
|
||
lang=EN-US> *((void **)obj) =
|
||
bdesc->freeptr;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>206</span></u><span
|
||
lang=EN-US> bdesc->freeptr =
|
||
obj;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>207</span></u><span
|
||
lang=EN-US> bdesc->refcnt--;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѵ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǾͿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŶ<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>208</span></u><span
|
||
lang=EN-US> if
|
||
(bdesc->refcnt == 0) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>209</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>210</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
We need to make sure that prev is still accurate. It</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>211</span></u><span
|
||
lang=EN-US> <b><i> *
|
||
may not be, if someone rudely interrupted us....</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>212</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><EFBFBD><EFBFBD>Ҫȷ<EFBFBD><EFBFBD><span lang=EN-US>prev</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>³<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
* </span><EFBFBD><EFBFBD><EFBFBD>п<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><span lang=EN-US>prev</span><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>213</span></u><span
|
||
lang=EN-US>
|
||
if ((prev && (prev->next != bdesc)) ||</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>214</span></u><span
|
||
lang=EN-US>
|
||
(!prev && (bdir->chain != bdesc)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>215</span></u><span
|
||
lang=EN-US>
|
||
for (prev = bdir->chain; prev; prev = prev->next)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>216</span></u><span
|
||
lang=EN-US>
|
||
if (prev->next == bdesc)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>217</span></u><span
|
||
lang=EN-US>
|
||
break;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>ǰһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>218</span></u><span
|
||
lang=EN-US>
|
||
if (prev)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>219</span></u><span
|
||
lang=EN-US>
|
||
prev->next = bdesc->next;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>prev==NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>chain</span>Ӧ<EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>bdesc</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD>Ϊ<EFBFBD>˽<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>chain</span>ָ<EFBFBD><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'>220</span></u><span
|
||
lang=EN-US>
|
||
else {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>221</span></u><span
|
||
lang=EN-US>
|
||
if (bdir->chain != bdesc)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>222</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>panic</span></u>(<i>"malloc bucket chains
|
||
corrupted"</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>223</span></u><span
|
||
lang=EN-US>
|
||
bdir->chain = bdesc->next;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>224</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ͷŵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>ҳ<EFBFBD>棬<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><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>225</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free_page</span></u>((unsigned long)
|
||
bdesc->page);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>226</span></u><span
|
||
lang=EN-US>
|
||
bdesc->next = <u><span style='color:blue'>free_bucket_desc</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>227</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>free_bucket_desc</span></u> = bdesc;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>228</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>жϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ء<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>229</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>sti</span></u>();</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>230</span></u><span
|
||
lang=EN-US> return;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>231</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>232</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>233</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>
|