Google Git Google Git
Sign in
fuchsia/third_party/github.com/microsoft/mimalloc/refs/heads/upstream/dev3-nuget/./docs/using.html
blob: 4c0bff6a2c4a557ab221d7f9b60b662ef8cc8c56 [file] [edit]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=11"/>
<meta name="generator" content="Doxygen 1.11.0"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>mi-malloc: Using the Library</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<script type="text/javascript" src="clipboard.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="navtreedata.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="cookie.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(function() { init_search(); });
/* @license-end */
</script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="mimalloc-doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr id="projectrow">
<td id="projectlogo"><img alt="Logo" src="mimalloc-logo.svg"/></td>
<td id="projectalign">
<div id="projectname">mi-malloc<span id="projectnumber">&#160;v1.9, v2.2, v3.2</span>
</div>
</td>
<td> <div id="MSearchBox" class="MSearchBoxInactive">
<span class="left">
<span id="MSearchSelect" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()">&#160;</span>
<input type="text" id="MSearchField" value="" placeholder="Search" accesskey="S"
onfocus="searchBox.OnSearchFieldFocus(true)"
onblur="searchBox.OnSearchFieldFocus(false)"
onkeyup="searchBox.OnSearchFieldChange(event)"/>
</span><span class="right">
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.svg" alt=""/></a>
</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.11.0 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
var searchBox = new SearchBox("searchBox", "search/",'.html');
/* @license-end */
</script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(function() { codefold.init(0); });
/* @license-end */
</script>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(function(){initNavTree('using.html',''); initResizable(true); });
/* @license-end */
</script>
<div id="doc-content">
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<div id="MSearchResults">
<div class="SRPage">
<div id="SRIndex">
<div id="SRResults"></div>
<div class="SRStatus" id="Loading">Loading...</div>
<div class="SRStatus" id="Searching">Searching...</div>
<div class="SRStatus" id="NoMatches">No Matches</div>
</div>
</div>
</div>
</div>
<div><div class="header">
<div class="headertitle"><div class="title">Using the Library</div></div>
</div><!--header-->
<div class="contents">
<div class="textblock"><h3>Build</h3>
<p>The preferred usage is including <code>&lt;mimalloc.h&gt;</code>, linking with the shared- or static library, and using the <code>mi_malloc</code> API exclusively for allocation. For example, </p><div class="fragment"><div class="line">gcc -o myprogram -lmimalloc myfile.c</div>
</div><!-- fragment --><p>mimalloc uses only safe OS calls (<code>mmap</code> and <code>VirtualAlloc</code>) and can co-exist with other allocators linked to the same program. If you use <code>cmake</code>, you can simply use: </p><div class="fragment"><div class="line">find_package(mimalloc 2.1 REQUIRED)</div>
</div><!-- fragment --><p> in your <code>CMakeLists.txt</code> to find a locally installed mimalloc. Then use either: </p><div class="fragment"><div class="line">target_link_libraries(myapp PUBLIC mimalloc)</div>
</div><!-- fragment --><p> to link with the shared (dynamic) library, or: </p><div class="fragment"><div class="line">target_link_libraries(myapp PUBLIC mimalloc-<span class="keyword">static</span>)</div>
</div><!-- fragment --><p> to link with the static library. See <code>test\CMakeLists.txt</code> for an example.</p>
<h3>C++</h3>
<p>For best performance in C++ programs, it is also recommended to override the global <code>new</code> and <code>delete</code> operators. For convenience, mimalloc provides <a href="https://github.com/microsoft/mimalloc/blob/master/include/mimalloc-new-delete.h"><code>mimalloc-new-delete.h</code></a> which does this for you &ndash; just include it in a single(!) source file in your project.</p>
<p>In C++, mimalloc also provides the <code><a class="el" href="group__cpp.html#structmi__stl__allocator" title="std::allocator implementation for mimalloc for use in STL containers. For example:">mi_stl_allocator</a></code> struct which implements the <code>std::allocator</code> interface. For example: </p><div class="fragment"><div class="line">std::vector&lt;some_struct, mi_stl_allocator&lt;some_struct&gt;&gt; vec;</div>
<div class="line">vec.push_back(some_struct());</div>
</div><!-- fragment --><h3>Statistics</h3>
<p>You can pass environment variables to print verbose messages (<code>MIMALLOC_VERBOSE=1</code>) and statistics (<code>MIMALLOC_SHOW_STATS=1</code>) (in the debug version): </p><div class="fragment"><div class="line">&gt; env MIMALLOC_SHOW_STATS=1 ./cfrac 175451865205073170563711388363</div>
<div class="line"> </div>
<div class="line">175451865205073170563711388363 = 374456281610909315237213 * 468551</div>
<div class="line"> </div>
<div class="line">subproc 0</div>
<div class="line"> blocks peak total current block total#</div>
<div class="line"> bin S 4: 75.3 KiB 55.2 MiB 0 32 B 1.8 M ok</div>
<div class="line"> bin S 6: 31.0 KiB 180.4 KiB 0 48 B 3.8 K ok</div>
<div class="line"> bin S 8: 64 B 64 B 0 64 B 1 ok</div>
<div class="line"> bin S 9: 160 B 160 B 0 80 B 2 ok</div>
<div class="line"> bin S 17: 1.2 KiB 1.2 KiB 0 320 B 4 ok</div>
<div class="line"> bin S 21: 640 B 3.1 KiB 0 640 B 5 ok</div>
<div class="line"> bin S 33: 5.0 KiB 5.0 KiB 0 5.0 KiB 1 ok</div>
<div class="line"> </div>
<div class="line"> binned : 84.2 Ki 41.5 Mi 0 ok</div>
<div class="line"> huge : 0 0 0 ok</div>
<div class="line"> total : 84.2 KiB 41.5 MiB 0</div>
<div class="line"> malloc req: 29.7 MiB</div>
<div class="line"> </div>
<div class="line"> pages peak total current block total#</div>
<div class="line"> touched : 152.8 KiB 152.8 KiB 152.8 KiB</div>
<div class="line"> pages : 8 14 0 ok</div>
<div class="line"> abandoned : 1 249 0 ok</div>
<div class="line"> reclaima : 0</div>
<div class="line"> reclaimf : 249</div>
<div class="line"> reabandon : 0</div>
<div class="line"> waits : 0</div>
<div class="line"> extended : 38</div>
<div class="line"> retire : 35</div>
<div class="line"> searches : 0.7 avg</div>
<div class="line"> </div>
<div class="line"> arenas peak total current block total#</div>
<div class="line"> reserved : 1.0 GiB 1.0 GiB 1.0 GiB</div>
<div class="line"> committed : 4.8 MiB 4.8 MiB 4.4 MiB</div>
<div class="line"> reset : 0</div>
<div class="line"> purged : 385.5 Ki</div>
<div class="line"> arenas : 1</div>
<div class="line"> rollback : 0</div>
<div class="line"> mmaps : 3</div>
<div class="line"> commits : 0</div>
<div class="line"> resets : 1</div>
<div class="line"> purges : 2</div>
<div class="line"> guarded : 0</div>
<div class="line"> heaps : 1 1 1</div>
<div class="line"> </div>
<div class="line"> process peak total current block total#</div>
<div class="line"> threads : 1 1 1</div>
<div class="line"> numa nodes: 1</div>
<div class="line"> elapsed : 0.553 s</div>
<div class="line"> process : user: 0.557 s, system: 0.013 s, faults: 29, peak rss: 2.1 MiB, peak commit: 4.8 MiB</div>
</div><!-- fragment --><p>The above model of using the <code>mi_</code> prefixed API is not always possible though in existing programs that already use the standard malloc interface, and another option is to override the standard malloc interface completely and redirect all calls to the <em>mimalloc</em> library instead.</p>
<p>See <a class="el" href="overrides.html">Overriding Malloc</a> for more info. </p>
</div></div><!-- contents -->
</div><!-- PageDoc -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.11.0 </li>
</ul>
</div>
</body>
</html>