📄 getpagesize.html

📁 unix 下的C开发手册,还用详细的例程。
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>getpagesize</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_005_626">&nbsp;</a>NAME</h4><blockquote>getpagesize - get the current page size(<b>LEGACY</b>)</blockquote><h4><a name = "tag_000_005_627">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>#include &lt;<a href="unistd.h.html">unistd.h</a>&gt;int getpagesize(void);</code></pre></blockquote><h4><a name = "tag_000_005_628">&nbsp;</a>DESCRIPTION</h4><blockquote>The<i>getpagesize()</i>function returns the current page size.<p>The<i>getpagesize()</i>function is equivalent to <i>sysconf</i>(_SC_PAGE_SIZE) and<i>sysconf</i>(_SC_PAGESIZE).<p>This interface need not be reentrant.</blockquote><h4><a name = "tag_000_005_629">&nbsp;</a>RETURN VALUE</h4><blockquote>The<i>getpagesize()</i>function returns the current page size.</blockquote><h4><a name = "tag_000_005_630">&nbsp;</a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_005_631">&nbsp;</a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_005_632">&nbsp;</a>APPLICATION USAGE</h4><blockquote>The value returned by<i>getpagesize()</i>need not be the minimum value that<i><a href="malloc.html">malloc()</a></i>can allocate.  Moreover, the application cannot assume that anobject of this size can be allocated with<i><a href="malloc.html">malloc()</a></i>.<p>This interface, returning an <b>int</b>,may have problems representingappropriate values in the future. Applications should use the<i><a href="sysconf.html">sysconf()</a></i>function instead.</blockquote><h4><a name = "tag_000_005_633">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_005_634">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="getrlimit.html">getrlimit()</a></i>,<i><a href="mmap.html">mmap()</a></i>,<i><a href="mprotect.html">mprotect()</a></i>,<i><a href="munmap.html">munmap()</a></i>,<i><a href="msync.html">msync()</a></i>,<i><a href="sysconf.html">sysconf()</a></i>,<i><a href="unistd.h.html">&lt;unistd.h&gt;</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>
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