3party/mimalloc
0
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2024-12-27 13:33:18 +08:00
Code Issues Projects Releases Wiki Activity
mimalloc/docs/group__aligned.html
Johannes Schindelin 745a34f475 Fix whitespace 
This mostly deletes trailing spaces.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2022-12-03 00:24:20 +01:00

466 lines
20 KiB
HTML
Raw Blame History

<!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">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.9.1"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>mi-malloc: Aligned Allocation</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>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtreedata.js"></script>
<script type="text/javascript" src="navtree.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:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
$(document).ready(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 style="height: 56px;">
<td id="projectlogo"><img alt="Logo" src="mimalloc-logo.svg"/></td>
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">mi-malloc
&#160;<span id="projectnumber">1.7/2.0</span>
</div>
</td>
<td> <div id="MSearchBox" class="MSearchBoxInactive">
<span class="left">
<img id="MSearchSelect" src="search/mag_sel.svg"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
alt=""/>
<input type="text" id="MSearchField" value="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 1.9.1 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
var searchBox = new SearchBox("searchBox", "search",false,'Search','.html');
/* @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:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
$(document).ready(function(){initNavTree('group__aligned.html',''); initResizable(); });
/* @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">
<iframe src="javascript:void(0)" frameborder="0"
name="MSearchResults" id="MSearchResults">
</iframe>
</div>
<div class="header">
<div class="summary">
<a href="#define-members">Macros</a> &#124;
<a href="#func-members">Functions</a> </div>
<div class="headertitle">
<div class="title">Aligned Allocation</div> </div>
</div><!--header-->
<div class="contents">
<p>Allocating aligned memory blocks.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:ga83c03016066b438f51a8095e9140be06"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga83c03016066b438f51a8095e9140be06">MI_ALIGNMENT_MAX</a></td></tr>
<tr class="memdesc:ga83c03016066b438f51a8095e9140be06"><td class="mdescLeft">&#160;</td><td class="mdescRight">The maximum supported alignment size (currently 1MiB). <a href="group__aligned.html#ga83c03016066b438f51a8095e9140be06">More...</a><br /></td></tr>
<tr class="separator:ga83c03016066b438f51a8095e9140be06"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga68930196751fa2cca9e1fd0d71bade56"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga68930196751fa2cca9e1fd0d71bade56">mi_malloc_aligned</a> (size_t size, size_t alignment)</td></tr>
<tr class="memdesc:ga68930196751fa2cca9e1fd0d71bade56"><td class="mdescLeft">&#160;</td><td class="mdescRight">Allocate <em>size</em> bytes aligned by <em>alignment</em>. <a href="group__aligned.html#ga68930196751fa2cca9e1fd0d71bade56">More...</a><br /></td></tr>
<tr class="separator:ga68930196751fa2cca9e1fd0d71bade56"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga0cadbcf5b89a7b6fb171bc8df8734819"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga0cadbcf5b89a7b6fb171bc8df8734819">mi_zalloc_aligned</a> (size_t size, size_t alignment)</td></tr>
<tr class="separator:ga0cadbcf5b89a7b6fb171bc8df8734819"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga53dddb4724042a90315b94bc268fb4c9"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga53dddb4724042a90315b94bc268fb4c9">mi_calloc_aligned</a> (size_t count, size_t size, size_t alignment)</td></tr>
<tr class="separator:ga53dddb4724042a90315b94bc268fb4c9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga4028d1cf4aa4c87c880747044a8322ae"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga4028d1cf4aa4c87c880747044a8322ae">mi_realloc_aligned</a> (void *p, size_t newsize, size_t alignment)</td></tr>
<tr class="separator:ga4028d1cf4aa4c87c880747044a8322ae"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga5850da130c936bd77db039dcfbc8295d"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga5850da130c936bd77db039dcfbc8295d">mi_malloc_aligned_at</a> (size_t size, size_t alignment, size_t offset)</td></tr>
<tr class="memdesc:ga5850da130c936bd77db039dcfbc8295d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Allocate <em>size</em> bytes aligned by <em>alignment</em> at a specified <em>offset</em>. <a href="group__aligned.html#ga5850da130c936bd77db039dcfbc8295d">More...</a><br /></td></tr>
<tr class="separator:ga5850da130c936bd77db039dcfbc8295d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga5f8c2353766db522565e642fafd8a3f8"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga5f8c2353766db522565e642fafd8a3f8">mi_zalloc_aligned_at</a> (size_t size, size_t alignment, size_t offset)</td></tr>
<tr class="separator:ga5f8c2353766db522565e642fafd8a3f8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga08647c4593f3b2eef24a919a73eba3a3"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#ga08647c4593f3b2eef24a919a73eba3a3">mi_calloc_aligned_at</a> (size_t count, size_t size, size_t alignment, size_t offset)</td></tr>
<tr class="separator:ga08647c4593f3b2eef24a919a73eba3a3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaf66a9ae6c6f08bd6be6fb6ea771faffb"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__aligned.html#gaf66a9ae6c6f08bd6be6fb6ea771faffb">mi_realloc_aligned_at</a> (void *p, size_t newsize, size_t alignment, size_t offset)</td></tr>
<tr class="separator:gaf66a9ae6c6f08bd6be6fb6ea771faffb"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>Allocating aligned memory blocks. </p>
<h2 class="groupheader">Macro Definition Documentation</h2>
<a id="ga83c03016066b438f51a8095e9140be06"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga83c03016066b438f51a8095e9140be06">&#9670;&nbsp;</a></span>MI_ALIGNMENT_MAX</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define MI_ALIGNMENT_MAX</td>
</tr>
</table>
</div><div class="memdoc">
<p>The maximum supported alignment size (currently 1MiB). </p>
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="ga53dddb4724042a90315b94bc268fb4c9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga53dddb4724042a90315b94bc268fb4c9">&#9670;&nbsp;</a></span>mi_calloc_aligned()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_calloc_aligned </td>
<td>(</td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>count</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a id="ga08647c4593f3b2eef24a919a73eba3a3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga08647c4593f3b2eef24a919a73eba3a3">&#9670;&nbsp;</a></span>mi_calloc_aligned_at()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_calloc_aligned_at </td>
<td>(</td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>count</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>offset</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a id="ga68930196751fa2cca9e1fd0d71bade56"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga68930196751fa2cca9e1fd0d71bade56">&#9670;&nbsp;</a></span>mi_malloc_aligned()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_malloc_aligned </td>
<td>(</td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Allocate <em>size</em> bytes aligned by <em>alignment</em>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">size</td><td>number of bytes to allocate. </td></tr>
<tr><td class="paramname">alignment</td><td>the minimal alignment of the allocated memory. Must be less than <a class="el" href="group__aligned.html#ga83c03016066b438f51a8095e9140be06" title="The maximum supported alignment size (currently 1MiB).">MI_ALIGNMENT_MAX</a>. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>pointer to the allocated memory or <em>NULL</em> if out of memory. The returned pointer is aligned by <em>alignment</em>, i.e. <code>(uintptr_t)p % alignment == 0</code>.</dd></dl>
<p>Returns a unique pointer if called with <em>size</em> 0. </p><dl class="section see"><dt>See also</dt><dd><a href="https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-malloc?view=vs-2017">_aligned_malloc</a> (on Windows) </dd>
<dd>
<a href="http://man.openbsd.org/reallocarray">aligned_alloc</a> (on BSD, with switched arguments!) </dd>
<dd>
<a href="https://linux.die.net/man/3/posix_memalign">posix_memalign</a> (on Posix, with switched arguments!) </dd>
<dd>
<a href="https://linux.die.net/man/3/posix_memalign">memalign</a> (on Linux, with switched arguments!) </dd></dl>
</div>
</div>
<a id="ga5850da130c936bd77db039dcfbc8295d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga5850da130c936bd77db039dcfbc8295d">&#9670;&nbsp;</a></span>mi_malloc_aligned_at()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_malloc_aligned_at </td>
<td>(</td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>offset</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Allocate <em>size</em> bytes aligned by <em>alignment</em> at a specified <em>offset</em>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">size</td><td>number of bytes to allocate. </td></tr>
<tr><td class="paramname">alignment</td><td>the minimal alignment of the allocated memory at <em>offset</em>. </td></tr>
<tr><td class="paramname">offset</td><td>the offset that should be aligned. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>pointer to the allocated memory or <em>NULL</em> if out of memory. The returned pointer is aligned by <em>alignment</em> at <em>offset</em>, i.e. <code>((uintptr_t)p + offset) % alignment == 0</code>.</dd></dl>
<p>Returns a unique pointer if called with <em>size</em> 0. </p><dl class="section see"><dt>See also</dt><dd><a href="https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-offset-malloc?view=vs-2017">_aligned_offset_malloc</a> (on Windows) </dd></dl>
</div>
</div>
<a id="ga4028d1cf4aa4c87c880747044a8322ae"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga4028d1cf4aa4c87c880747044a8322ae">&#9670;&nbsp;</a></span>mi_realloc_aligned()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_realloc_aligned </td>
<td>(</td>
<td class="paramtype">void *&#160;</td>
<td class="paramname"><em>p</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>newsize</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a id="gaf66a9ae6c6f08bd6be6fb6ea771faffb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaf66a9ae6c6f08bd6be6fb6ea771faffb">&#9670;&nbsp;</a></span>mi_realloc_aligned_at()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_realloc_aligned_at </td>
<td>(</td>
<td class="paramtype">void *&#160;</td>
<td class="paramname"><em>p</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>newsize</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>offset</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a id="ga0cadbcf5b89a7b6fb171bc8df8734819"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga0cadbcf5b89a7b6fb171bc8df8734819">&#9670;&nbsp;</a></span>mi_zalloc_aligned()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_zalloc_aligned </td>
<td>(</td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<a id="ga5f8c2353766db522565e642fafd8a3f8"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga5f8c2353766db522565e642fafd8a3f8">&#9670;&nbsp;</a></span>mi_zalloc_aligned_at()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void* mi_zalloc_aligned_at </td>
<td>(</td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>alignment</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>offset</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
</div><!-- contents -->
</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> 1.9.1 </li>
</ul>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink