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<title>mem.c -- memory operations</title>
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<body>
<!-- Navigation links -->
<p><a name="TOP"><b>Up:</b></a> <a
href="http://www.geom.umn.edu/software/qhull">Home page</a> for Qhull<br>
<b>Up:</b> <a href="../html/index.htm#TOC">Qhull manual</a>: Table of Contents <br>
<b>Up:</b> <a href="../html/qh-quick.htm#programs">Programs</a>
• <a href="../html/qh-quick.htm#options">Options</a>
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• <a href="../html/qh-optg.htm#geomview">Geomview</a>
• <a href="../html/qh-optp.htm#print">Print</a>
• <a href="../html/qh-optq.htm#qhull">Qhull</a>
• <a href="../html/qh-optc.htm#prec">Precision</a>
• <a href="../html/qh-optt.htm#trace">Trace</a><br>
<b>Up:</b> <a href="../html/qh-in.htm#TOC">Qhull internals: Table of Contents</a><br>
<b>To:</b> <a href="index.htm">Qhull functions</a>, macros, and data structures<br>
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• <a href="qh-io.htm">Io</a> • <a href="qh-mem.htm#TOC">Mem</a>
• <a href="qh-merge.htm">Merge</a> • <a href="qh-poly.htm">Poly</a>
• <a href="qh-qhull.htm">Qhull</a> • <a href="qh-set.htm">Set</a>
• <a href="qh-stat.htm">Stat</a> • <a href="qh-user.htm">User</a>
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<hr>
<h2>mem.c -- memory operations</h2>
<blockquote>
<p>Qhull uses quick-fit memory allocation. It maintains a
set of free lists for a variety of small allocations. A
small request returns a block from the best fitting free
list. If the free list is empty, Qhull allocates a block
from a reserved buffer. </p>
<p>Use 'T5' to trace memory allocations.</p>
</blockquote>
<p><b>Copyright © 1995-2002 The Geometry Center, Minneapolis MN</b></p>
<hr>
<p><a href="#TOP">ｻ</a> <a href="qh-geom.htm#TOC">Geom</a>
<a name="TOC">•</a> <a href="qh-globa.htm#TOC">Global</a> •
<a href="qh-io.htm#TOC">Io</a> • <b>Mem</b>
• <a href="qh-merge.htm#TOC">Merge</a> • <a href="qh-poly.htm#TOC">Poly</a>
• <a href="qh-qhull.htm#TOC">Qhull</a> • <a href="qh-set.htm#TOC">Set</a>
• <a href="qh-stat.htm#TOC">Stat</a> • <a href="qh-user.htm#TOC">User</a>
</p>
<h3>Index to <a href="mem.c">mem.c</a> and
<a href="mem.h">mem.h</a></h3>
<ul>
<li><a href="#etype">mem.h data types</a> </li>
<li><a href="#emacro">mem.h macros</a> </li>
<li><a href="#efunc">User level functions</a> </li>
</ul>
<h3><a href="qh-mem.htm#TOC">ｻ</a><a name="etype">mem.h data types and constants</a></h3>
<ul>
<li><a href="mem.h#ptr_intT">ptr_intT</a> for casting
a void* to an integer-type </li>
<li><a href="mem.h#qhmemT">qhmemT</a> global memory
structure for mem.c </li>
<li><a href="mem.h#NOmem">qh_NOmem</a> disable memory allocation</li>
</ul>
<h3><a href="qh-mem.htm#TOC">ｻ</a><a name="emacro">mem.h macros</a></h3>
<ul>
<li><a href="mem.h#memalloc_">qh_memalloc_</a>
allocate memory</li>
<li><a href="mem.h#memfree_">qh_memfree_</a> free
memory</li>
</ul>
<h3><a href="qh-mem.htm#TOC">ｻ</a><a name="efunc">User level
functions</a></h3>
<ul>
<li><a href="mem.c#memalloc">qh_memalloc</a> allocate
memory </li>
<li><a href="mem.c#memfree">qh_memfree</a> free
memory </li>
<li><a href="mem.c#meminit">qh_meminit</a> initialize
memory </li>
<li><a href="mem.c#memstatistics">qh_memstatistics</a>
print memory statistics </li>
<li><a href="mem.c#NOmem">qh_NOmem</a> allocation routines with malloc() and free()
</ul>
<h3><a href="qh-mem.htm#TOC">ｻ</a><a name="m">Initialization and
termination functions</a></h3>
<ul>
<li><a href="mem.c#intcompare">qh_intcompare</a> used by
qsort and bsearch to compare two integers </li>
<li><a href="mem.c#memfreeshort">qh_memfreeshort</a>
frees up all short and qhmem memory allocations </li>
<li><a href="mem.c#meminit">qh_meminit</a> initialize
memory </li>
<li><a href="mem.c#meminitbuffers">qh_meminitbuffers</a>
initialize qhmem </li>
<li><a href="mem.c#memsetup">qh_memsetup</a> set up
memory after running memsize() </li>
<li><a href="mem.c#memsize">qh_memsize</a> define a free
list for this size </li>
<li><a href="mem.c#memstatistics">qh_memstatistics</a>
print out memory statistics </li>
</ul>
<p><!-- Navigation links --> </p>
<hr>
<p><b>Up:</b>
<a href="http://www.geom.umn.edu/software/qhull">Home page for
Qhull</a> <br>
<b>Up:</b> <a href="../html/index.htm#TOC">Qhull manual: Table of Contents</a> <br>
<b>Up:</b> <a href="../html/qh-quick.htm#programs">Programs</a>
• <a href="../html/qh-quick.htm#options">Options</a>
• <a href="../html/qh-opto.htm#output">Output</a>
• <a href="../html/qh-optf.htm#format">Formats</a>
• <a href="../html/qh-optg.htm#geomview">Geomview</a>
• <a href="../html/qh-optp.htm#print">Print</a>
• <a href="../html/qh-optq.htm#qhull">Qhull</a>
• <a href="../html/qh-optc.htm#prec">Precision</a>
• <a href="../html/qh-optt.htm#trace">Trace</a><br>
<b>Up:</b> <a href="../html/qh-in.htm#TOC">Qhull internals: Table of Contents</a> <br>
<b>To:</b> <a href="index.htm">Qhull functions</a>, macros, and data structures<br>
<b>To:</b> <a href="qh-geom.htm">Geom</a> •
<a href="qh-globa.htm">Global</a> • <a href="qh-io.htm">Io</a>
• <a href="qh-mem.htm">Mem</a> • <a href="qh-merge.htm">Merge</a>
• <a href="qh-poly.htm">Poly</a> • <a href="qh-qhull.htm#TOC">Qhull</a>
• <a href="qh-set.htm">Set</a> • <a href="qh-stat.htm">Stat</a>
• <a href="qh-user.htm">User</a><br>
</p>
<p><!-- GC common information --> </p>
<hr>
<p><a href="http://www.geom.umn.edu/"><img
src="../html/qh--geom.gif" align="middle" width="40" height="40"></a><i>The
Geometry Center Home Page </i></p>
<p>Comments to: <a href=mailto:qhull@geom.umn.edu>qhull@geom.umn.edu</a>
</a><br>
Created: May 2, 1997 --- <!-- hhmts start --> Last modified: see top <!-- hhmts end --> </p>
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