117 lines
4.1 KiB
HTML
117 lines
4.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title><ucontext.h></title>
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</head>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="<ucontext.h>"></a> <a name="tag_13_78"></a><!-- <ucontext.h> -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_13_78_01"></a>NAME</h4>
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<blockquote>ucontext.h - user context</blockquote>
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<h4><a name="tag_13_78_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <ucontext.h> <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></div>
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</blockquote>
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<h4><a name="tag_13_78_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i><ucontext.h></i> header shall define the <b>mcontext_t</b> type through <b>typedef</b>.</p>
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<p>The <i><ucontext.h></i> header shall define the <b>ucontext_t</b> type as a structure that shall include at least the
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following members:</p>
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<pre>
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<tt>ucontext_t *uc_link </tt> Pointer to the context that is resumed <tt>
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</tt> when this context returns. <tt>
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sigset_t uc_sigmask </tt> The set of signals that are blocked when this <tt>
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</tt> context is active. <tt>
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stack_t uc_stack </tt> The stack used by this context. <tt>
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mcontext_t uc_mcontext</tt> A machine-specific representation of the saved <tt>
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</tt> context. <tt>
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</tt>
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</pre>
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<p>The types <b>sigset_t</b> and <b>stack_t</b> shall be defined as in <a href="signal.h.html"><i><signal.h></i></a> .</p>
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<p>The following shall be declared as functions and may also be defined as macros, Function prototypes shall be provided.</p>
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<pre>
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<tt>int getcontext(ucontext_t *);
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int setcontext(const ucontext_t *);
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void makecontext(ucontext_t *, void (*)(void), int, ...);
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int swapcontext(ucontext_t *restrict, const ucontext_t *restrict);
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</tt>
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</pre>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_13_78_04"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_78_05"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_78_06"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_13_78_07"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="signal.h.html"><i><signal.h></i></a> , the System Interfaces volume of IEEE Std 1003.1-2001, <a href=
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"../functions/getcontext.html"><i>getcontext</i>()</a>, <a href="../functions/makecontext.html"><i>makecontext</i>()</a>, <a href=
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"../functions/sigaction.html"><i>sigaction</i>()</a>, <a href="../functions/sigprocmask.html"><i>sigprocmask</i>()</a>, <a href=
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"../functions/sigaltstack.html"><i>sigaltstack</i>()</a></p>
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</blockquote>
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<h4><a name="tag_13_78_08"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 4, Version 2.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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<center><font size="2"><!--footer start-->
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
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"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
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