<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en_US" xml:lang="en_US">
<head>
<title>kdecore: kvmallocator.cpp Source File (kdecore)</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<meta http-equiv="pics-label" content='(pics-1.1 "http://www.icra.org/ratingsv02.html" comment "ICRAonline DE v2.0" l gen true for "http://www.kde.org" r (nz 1 vz 1 lz 1 oz 1 cb 1) "http://www.rsac.org/ratingsv01.html" l gen true for "http://www.kde.org" r (n 0 s 0 v 0 l 0))' />
<meta name="trademark" content="KDE e.V." />
<meta name="description" content="K Desktop Environment Homepage, KDE.org" />
<meta name="MSSmartTagsPreventParsing" content="true" />
<meta name="robots" content="all" />
<link rel="shortcut icon" href="../../favicon.ico" />
<link rel="stylesheet" media="screen" type="text/css" title="APIDOX" href="doxygen.css" />
</head>
<body>
<div id="nav_header_top" align="right">
<a href="#content" class="doNotDisplay" accesskey="2">Skip to main content ::</a>
<a href="../.."><img id="nav_header_logo" alt="Home" align="left" src="../../kde_gear_64.png" border="0" /></a>
<span class="doNotDisplay">::</span>
<div id="nav_header_title" align="left">KDE API Reference</div>
</div>
<div id="nav_header_bottom" align="right">
<span class="doNotDisplay">:: <a href="#navigation" accesskey="5">Skip to Link Menu</a><br/></span>
<div id="nav_header_bottom_right" style="text-align: left;">
/ <a href="../..">API Reference</a>
/ <a href=".">kdecore</a>
</div>
</div>
<table id="main" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td valign="top" class="menuheader" height="0"></td>
<td id="contentcolumn" valign="top" rowspan="2" >
<div id="content" style="padding-top: 0px;"><div style="width:100%; margin: 0px; padding: 0px;">
<a name="content"></a>
<!-- Generated by Doxygen 1.7.4 -->
<div class="header">
<div class="headertitle">
<div class="title">kvmallocator.cpp</div> </div>
</div>
<div class="contents">
<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> This file is part of the KDE libraries</span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment"> Copyright (C) 1999 Waldo Bastian (bastian@kde.org)</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00007"></a>00007 <span class="comment"> modify it under the terms of the GNU Library General Public</span>
<a name="l00008"></a>00008 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00009"></a>00009 <span class="comment"> version 2 of the License, or (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00014"></a>00014 <span class="comment"> Library General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> You should have received a copy of the GNU Library General Public License</span>
<a name="l00017"></a>00017 <span class="comment"> along with this library; see the file COPYING.LIB. If not, write to</span>
<a name="l00018"></a>00018 <span class="comment"> the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span>
<a name="l00019"></a>00019 <span class="comment"> Boston, MA 02110-1301, USA.</span>
<a name="l00020"></a>00020 <span class="comment">*/</span>
<a name="l00021"></a>00021 <span class="comment">//----------------------------------------------------------------------------</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00023"></a>00023 <span class="comment">// Virtual Memory Allocator</span>
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="comment">// TODO: Add large file support.</span>
<a name="l00026"></a>00026 <span class="comment">// TODO: Error reporting. (e.g. disk-full)</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="preprocessor">#include <unistd.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <sys/mman.h></span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="preprocessor">#include <qintdict.h></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <qmap.h></span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="preprocessor">#include <ktempfile.h></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <kdebug.h></span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="preprocessor">#include "kvmallocator.h"</span>
<a name="l00038"></a>00038
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="preprocessor">#define KVM_ALIGN 4095</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span>
<a name="l00042"></a>00042 <span class="keyword">struct </span>KVMAllocator::Block
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 off_t start;
<a name="l00045"></a>00045 <span class="keywordtype">size_t</span> length; <span class="comment">// Requested length</span>
<a name="l00046"></a>00046 <span class="keywordtype">size_t</span> size; <span class="comment">// Actual size</span>
<a name="l00047"></a>00047 <span class="keywordtype">void</span> *mmap;
<a name="l00048"></a>00048 };
<a name="l00049"></a>00049
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="keyword">class </span>KVMAllocatorPrivate
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053 <span class="keyword">public</span>:
<a name="l00054"></a>00054 <a class="code" href="classKTempFile.html" title="The KTempFile class creates and opens a unique file for temporary use.">KTempFile</a> *tempfile;
<a name="l00055"></a>00055 off_t max_length;
<a name="l00056"></a>00056 <a class="codeRef" href="qmap.html">QMap<off_t, KVMAllocator::Block></a> used_blocks;
<a name="l00057"></a>00057 <a class="codeRef" href="qmap.html">QMap<off_t, KVMAllocator::Block></a> free_blocks;
<a name="l00058"></a>00058 };
<a name="l00059"></a>00059
<a name="l00063"></a><a class="code" href="classKVMAllocator.html#a28aec0dcfaceeb19ceb1b17a5bb74246">00063</a> <a class="code" href="classKVMAllocator.html#a28aec0dcfaceeb19ceb1b17a5bb74246" title="Create a KVMAllocator.">KVMAllocator::KVMAllocator</a>()
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 d = <span class="keyword">new</span> KVMAllocatorPrivate;
<a name="l00066"></a>00066 d->tempfile = 0;
<a name="l00067"></a>00067 d->max_length = 0;
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069
<a name="l00073"></a><a class="code" href="classKVMAllocator.html#a86622f83fef106f445209e261491ca75">00073</a> <a class="code" href="classKVMAllocator.html#a86622f83fef106f445209e261491ca75" title="Destruct the KVMAllocator and release all memory.">KVMAllocator::~KVMAllocator</a>()
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 <span class="keyword">delete</span> d->tempfile;
<a name="l00076"></a>00076 <span class="keyword">delete</span> d;
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078
<a name="l00083"></a>00083 KVMAllocator::Block *
<a name="l00084"></a><a class="code" href="classKVMAllocator.html#a99a8f4bd882d719fa8fcb5e232f68a76">00084</a> <a class="code" href="classKVMAllocator.html#a99a8f4bd882d719fa8fcb5e232f68a76" title="Allocate a virtual memory block.">KVMAllocator::allocate</a>(<span class="keywordtype">size_t</span> _size)
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 <span class="keywordflow">if</span> (!d->tempfile)
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 d->tempfile = <span class="keyword">new</span> <a class="code" href="classKTempFile.html" title="The KTempFile class creates and opens a unique file for temporary use.">KTempFile</a>(QString::null, <span class="stringliteral">"vmdata"</span>);
<a name="l00089"></a>00089 d->tempfile->unlink();
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091 <span class="comment">// Search in free list</span>
<a name="l00092"></a>00092 <a class="codeRef" href="qmap.html">QMap<off_t,KVMAllocator::Block>::iterator</a> it;
<a name="l00093"></a>00093 it = d->free_blocks.begin();
<a name="l00094"></a>00094 <span class="keywordflow">while</span> (it != d->free_blocks.end())
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <span class="keywordflow">if</span> (it.data().<a class="codeRef" href="qmap.html#size">size</a> > _size)
<a name="l00097"></a>00097 {
<a name="l00098"></a>00098 Block &free_block = it.data();
<a name="l00099"></a>00099 Block block;
<a name="l00100"></a>00100 kdDebug(180)<<<span class="stringliteral">"VM alloc: using block from free list "</span><<(long)free_block.start<<<span class="stringliteral">" size ="</span><<(<span class="keywordtype">long</span>)free_block.size<<<span class="stringliteral">" request = "</span><<_size<< <a class="code" href="group__kdebug.html#ga313d520ed8f8f6b46eeef22cfb3b082a" title="Does nothing.">endl</a>;
<a name="l00101"></a>00101 block.start = free_block.start;
<a name="l00102"></a>00102 block.length = _size;
<a name="l00103"></a>00103 block.size = (_size + KVM_ALIGN) & ~KVM_ALIGN;
<a name="l00104"></a>00104 block.mmap = 0;
<a name="l00105"></a>00105 free_block.size -= block.size;
<a name="l00106"></a>00106 free_block.start += block.size;
<a name="l00107"></a>00107 <span class="keywordflow">if</span> (!free_block.size)
<a name="l00108"></a>00108 d->free_blocks.remove(it);
<a name="l00109"></a>00109 it = d->used_blocks.replace(block.start, block);
<a name="l00110"></a>00110 <span class="keywordflow">return</span> &(it.data());
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 ++it;
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="comment">// Create new block</span>
<a name="l00117"></a>00117 Block block;
<a name="l00118"></a>00118 block.start = d->max_length;
<a name="l00119"></a>00119 block.length = _size;
<a name="l00120"></a>00120 block.size = (_size + KVM_ALIGN) & ~KVM_ALIGN;
<a name="l00121"></a>00121 block.mmap = 0;
<a name="l00122"></a>00122 kdDebug(180)<<<span class="stringliteral">"VM alloc: using new block "</span><<(long)block.start<<<span class="stringliteral">" size ="</span><<(<span class="keywordtype">long</span>)block.size<<<span class="stringliteral">" request = "</span><<_size<< <a class="code" href="group__kdebug.html#ga313d520ed8f8f6b46eeef22cfb3b082a" title="Does nothing.">endl</a>;
<a name="l00123"></a>00123 it = d->used_blocks.replace(block.start, block);
<a name="l00124"></a>00124 d->max_length += block.size;
<a name="l00125"></a>00125 <span class="keywordflow">return</span> &(it.data());
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127
<a name="l00131"></a>00131 <span class="keywordtype">void</span>
<a name="l00132"></a><a class="code" href="classKVMAllocator.html#a070f150bea36838497930350d0b73036">00132</a> <a class="code" href="classKVMAllocator.html#a070f150bea36838497930350d0b73036" title="Free a virtual memory block.">KVMAllocator::free</a>(Block *block_p)
<a name="l00133"></a>00133 {
<a name="l00134"></a>00134 Block block = *block_p;
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (block.mmap)
<a name="l00136"></a>00136 {
<a name="l00137"></a>00137 kdDebug(180)<<<span class="stringliteral">"VM free: Block "</span><<(long)block.start<<<span class="stringliteral">" is still mmapped!"</span><<<a class="code" href="group__kdebug.html#ga313d520ed8f8f6b46eeef22cfb3b082a" title="Does nothing.">endl</a>;
<a name="l00138"></a>00138 <span class="keywordflow">return</span>;
<a name="l00139"></a>00139 }
<a name="l00140"></a>00140 <a class="codeRef" href="qmap.html">QMap<off_t,KVMAllocator::Block>::iterator</a> it;
<a name="l00141"></a>00141 it = d->used_blocks.find(block.start);
<a name="l00142"></a>00142 <span class="keywordflow">if</span> (it == d->used_blocks.end())
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 kdDebug(180)<<<span class="stringliteral">"VM free: Block "</span><<(long)block.start<<<span class="stringliteral">" is not allocated."</span><<<a class="code" href="group__kdebug.html#ga313d520ed8f8f6b46eeef22cfb3b082a" title="Does nothing.">endl</a>;
<a name="l00145"></a>00145 <span class="keywordflow">return</span>;
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147 d->used_blocks.remove(it);
<a name="l00148"></a>00148 it = d->free_blocks.replace(block.start, block);
<a name="l00149"></a>00149 <a class="codeRef" href="qmap.html">QMap<off_t,KVMAllocator::Block>::iterator</a> before = it;
<a name="l00150"></a>00150 --before;
<a name="l00151"></a>00151 <span class="keywordflow">if</span> (before != d->free_blocks.end())
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 Block &block_before = before.data();
<a name="l00154"></a>00154 <span class="keywordflow">if</span> ((block_before.start + off_t(block_before.size)) == block.start)
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <span class="comment">// Merge blocks.</span>
<a name="l00157"></a>00157 kdDebug(180) << <span class="stringliteral">"VM merging: Block "</span><< (long)block_before.start<<
<a name="l00158"></a>00158 <span class="stringliteral">" with "</span><< (<span class="keywordtype">long</span>)block.start<< <span class="stringliteral">" (before)"</span> << <a class="code" href="group__kdebug.html#ga313d520ed8f8f6b46eeef22cfb3b082a" title="Does nothing.">endl</a>;
<a name="l00159"></a>00159 block.size += block_before.size;
<a name="l00160"></a>00160 block.start = block_before.start;
<a name="l00161"></a>00161 it.data() = block;
<a name="l00162"></a>00162 d->free_blocks.remove(before);
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165
<a name="l00166"></a>00166 <a class="codeRef" href="qmap.html">QMap<off_t,KVMAllocator::Block>::iterator</a> after = it;
<a name="l00167"></a>00167 ++after;
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (after != d->free_blocks.end())
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 Block &block_after = after.data();
<a name="l00171"></a>00171 <span class="keywordflow">if</span> ((block.start + off_t(block.size)) == block_after.start)
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173 <span class="comment">// Merge blocks.</span>
<a name="l00174"></a>00174 kdDebug(180) << <span class="stringliteral">"VM merging: Block "</span><< (long)block.start<<
<a name="l00175"></a>00175 <span class="stringliteral">" with "</span><< (<span class="keywordtype">long</span>)block_after.start<< <span class="stringliteral">" (after)"</span> << <a class="code" href="group__kdebug.html#ga313d520ed8f8f6b46eeef22cfb3b082a" title="Does nothing.">endl</a>;
<a name="l00176"></a>00176 block.size += block_after.size;
<a name="l00177"></a>00177 it.data() = block;
<a name="l00178"></a>00178 d->free_blocks.remove(after);
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182
<a name="l00186"></a>00186 <span class="keywordtype">void</span>
<a name="l00187"></a><a class="code" href="classKVMAllocator.html#acaa363d33659cabdb0a55dbdc19b5a49">00187</a> <a class="code" href="classKVMAllocator.html#acaa363d33659cabdb0a55dbdc19b5a49" title="Copy data from a virtual memory block to normal memory.">KVMAllocator::copy</a>(<span class="keywordtype">void</span> *dest, Block *src, <span class="keywordtype">int</span> _offset, <span class="keywordtype">size_t</span> length)
<a name="l00188"></a>00188 {
<a name="l00189"></a>00189 (void) <a class="code" href="classKVMAllocator.html#aac35217b1d71606a5e462bc47dedacf7" title="Copy length bytes from _offset in the virtual memory block src to normal memory at address *dest...">copyBlock</a>(dest, src, _offset, length);
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="keywordtype">bool</span>
<a name="l00193"></a><a class="code" href="classKVMAllocator.html#aac35217b1d71606a5e462bc47dedacf7">00193</a> <a class="code" href="classKVMAllocator.html#aac35217b1d71606a5e462bc47dedacf7" title="Copy length bytes from _offset in the virtual memory block src to normal memory at address *dest...">KVMAllocator::copyBlock</a>(<span class="keywordtype">void</span> *dest, Block *src, <span class="keywordtype">int</span> _offset, <span class="keywordtype">size_t</span> length)
<a name="l00194"></a>00194 {
<a name="l00195"></a>00195 <span class="comment">//kdDebug(180)<<"VM read: seek "<<(long)src->start<<" +"<<_offset<<":"<<length<<endl;</span>
<a name="l00196"></a>00196 lseek(d->tempfile->handle(), src->start+_offset, SEEK_SET);
<a name="l00197"></a>00197 <span class="keywordflow">if</span> (length == 0)
<a name="l00198"></a>00198 length = src->length - _offset;
<a name="l00199"></a>00199 <span class="keywordtype">int</span> to_go = length;
<a name="l00200"></a>00200 <span class="keywordtype">int</span> done = 0;
<a name="l00201"></a>00201 <span class="keywordtype">char</span> *buf = (<span class="keywordtype">char</span> *) dest;
<a name="l00202"></a>00202 <span class="keywordflow">while</span>(to_go > 0)
<a name="l00203"></a>00203 {
<a name="l00204"></a>00204 <span class="keywordtype">int</span> n = read(d->tempfile->handle(), buf+done, to_go);
<a name="l00205"></a>00205 <span class="keywordflow">if</span> (n <= 0)
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 <span class="keywordflow">if</span> (n < 0)
<a name="l00208"></a>00208 <span class="keywordflow">return</span> <span class="keyword">false</span>; <span class="comment">// Error</span>
<a name="l00209"></a>00209 <span class="keywordflow">else</span>
<a name="l00210"></a>00210 <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// End of data</span>
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212 done += n;
<a name="l00213"></a>00213 to_go -= n;
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215 <span class="comment">// Done.</span>
<a name="l00216"></a>00216 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218
<a name="l00222"></a>00222 <span class="keywordtype">void</span>
<a name="l00223"></a><a class="code" href="classKVMAllocator.html#a9c2f67ff2265f10c845370a4ba6918c1">00223</a> <a class="code" href="classKVMAllocator.html#acaa363d33659cabdb0a55dbdc19b5a49" title="Copy data from a virtual memory block to normal memory.">KVMAllocator::copy</a>(Block *dest, <span class="keywordtype">void</span> *src, <span class="keywordtype">int</span> _offset, <span class="keywordtype">size_t</span> length)
<a name="l00224"></a>00224 {
<a name="l00225"></a>00225 (void) <a class="code" href="classKVMAllocator.html#aac35217b1d71606a5e462bc47dedacf7" title="Copy length bytes from _offset in the virtual memory block src to normal memory at address *dest...">copyBlock</a>(dest, src, _offset, length);
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227
<a name="l00228"></a>00228 <span class="keywordtype">bool</span>
<a name="l00229"></a><a class="code" href="classKVMAllocator.html#aabb79b822e3e2722a7c5939a661ba8ac">00229</a> <a class="code" href="classKVMAllocator.html#aac35217b1d71606a5e462bc47dedacf7" title="Copy length bytes from _offset in the virtual memory block src to normal memory at address *dest...">KVMAllocator::copyBlock</a>(Block *dest, <span class="keywordtype">void</span> *src, <span class="keywordtype">int</span> _offset, <span class="keywordtype">size_t</span> length)
<a name="l00230"></a>00230 {
<a name="l00231"></a>00231 <span class="comment">//kdDebug(180)<<"VM write: seek "<<(long)dest->start<<" +"<<_offset<< ":" << length << endl;</span>
<a name="l00232"></a>00232 lseek(d->tempfile->handle(), dest->start+_offset, SEEK_SET);
<a name="l00233"></a>00233 <span class="keywordflow">if</span> (length == 0)
<a name="l00234"></a>00234 length = dest->length - _offset;
<a name="l00235"></a>00235 <span class="keywordtype">int</span> to_go = length;
<a name="l00236"></a>00236 <span class="keywordtype">int</span> done = 0;
<a name="l00237"></a>00237 <span class="keywordtype">char</span> *buf = (<span class="keywordtype">char</span> *) src;
<a name="l00238"></a>00238 <span class="keywordflow">while</span>(to_go > 0)
<a name="l00239"></a>00239 {
<a name="l00240"></a>00240 <span class="keywordtype">int</span> n = write(d->tempfile->handle(), buf+done, to_go);
<a name="l00241"></a>00241 <span class="keywordflow">if</span> (n <= 0) <span class="keywordflow">return</span> <span class="keyword">false</span>; <span class="comment">// Error</span>
<a name="l00242"></a>00242 done += n;
<a name="l00243"></a>00243 to_go -= n;
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245 <span class="comment">// Done.</span>
<a name="l00246"></a>00246 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00247"></a>00247 }
<a name="l00248"></a>00248
<a name="l00252"></a>00252 <span class="keywordtype">void</span> *
<a name="l00253"></a><a class="code" href="classKVMAllocator.html#a98b531998ba0ebf7db502617d90c2b52">00253</a> <a class="code" href="classKVMAllocator.html#a98b531998ba0ebf7db502617d90c2b52" title="Map a virtual memory block in memory.">KVMAllocator::map</a>(Block *block)
<a name="l00254"></a>00254 {
<a name="l00255"></a>00255 <span class="keywordflow">if</span> (block->mmap)
<a name="l00256"></a>00256 <span class="keywordflow">return</span> block->mmap;
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="keywordtype">void</span> *result = mmap(0, block->length, PROT_READ| PROT_WRITE,
<a name="l00259"></a>00259 MAP_SHARED, d->tempfile->handle(), block->start);
<a name="l00260"></a>00260 block->mmap = result;
<a name="l00261"></a>00261 <span class="keywordflow">return</span> block->mmap;
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263
<a name="l00267"></a>00267 <span class="keywordtype">void</span>
<a name="l00268"></a><a class="code" href="classKVMAllocator.html#ad9408ca1d868813faba6eebf3e1c015f">00268</a> <a class="code" href="classKVMAllocator.html#ad9408ca1d868813faba6eebf3e1c015f" title="Unmap a virtual memory block.">KVMAllocator::unmap</a>(Block *block)
<a name="l00269"></a>00269 {
<a name="l00270"></a>00270 <span class="comment">// The following cast is necassery for Solaris.</span>
<a name="l00271"></a>00271 <span class="comment">// (touch it and die). --Waba</span>
<a name="l00272"></a>00272 munmap((<span class="keywordtype">char</span> *)block->mmap, block->length);
<a name="l00273"></a>00273 block->mmap = 0;
<a name="l00274"></a>00274 }
</pre></div></div>
</div>
</div></div>
</td>
</tr>
<tr>
<td valign="top" id="leftmenu" width="25%">
<a name="navigation"></a>
<div class="menu_box"><h2>kdecore</h2>
<div class="nav_list">
<ul><li><a href="index.html">Main Page</a></li><li><a href="modules.html">Modules</a></li><li><a href="namespaces.html">Namespace List</a></li><li><a href="hierarchy.html">Class Hierarchy</a></li><li><a href="classes.html">Alphabetical List</a></li><li><a href="annotated.html">Class List</a></li><li><a href="files.html">File List</a></li><li><a href="namespacemembers.html">Namespace Members</a></li><li><a href="functions.html">Class Members</a></li><li><a href="pages.html">Related Pages</a></li></ul>
<!--
<h2>Class Picker</h2>
<div style="text-align: center;">
<form name="guideform">
<select name="guidelinks" style="width:100%;" onChange="window.location=document.guideform.guidelinks.options[document.guideform.guidelinks.selectedIndex].value">
<option value="annotated.html">-- Choose --</option>
<option value="classKAboutData.html">kaboutdata</option>, <option value="classKAboutPerson.html">kaboutperson</option>, <option value="classKAboutTranslator.html">kabouttranslator</option>, <option value="classKAccel.html">kaccel</option>, <option value="classKAcceleratorManager.html">kacceleratormanager</option>, <option value="classKAccelManagerAlgorithm.html">kaccelmanageralgorithm</option>, <option value="classKAccelShortcutList.html">kaccelshortcutlist</option>, <option value="classKAccelString.html">kaccelstring</option>, <option value="classKAddressInfo.html">kaddressinfo</option>, <option value="classKAppDCOPInterface.html">kappdcopinterface</option>, <option value="classKApplication.html">kapplication</option>, <option value="classKAsyncIO.html">kasyncio</option>, <option value="classKAudioPlayer.html">kaudioplayer</option>, <option value="classKBufferedIO.html">kbufferedio</option>, <option value="classKCalendarSystem.html">kcalendarsystem</option>, <option value="classKCalendarSystemFactory.html">kcalendarsystemfactory</option>, <option value="classKCalendarSystemJalali.html">kcalendarsystemjalali</option>, <option value="classKCatalogue.html">kcatalogue</option>, <option value="classKCharMacroExpander.html">kcharmacroexpander</option>, <option value="classKCharsets.html">kcharsets</option>, <option value="classKClipboardSynchronizer.html">kclipboardsynchronizer</option>, <option value="classKCmdLineArgs.html">kcmdlineargs</option>, <option value="classKCodecs.html">kcodecs</option>, <option value="classKCompletion.html">kcompletion</option>, <option value="classKCompletionBase.html">kcompletionbase</option>, <option value="classKCompletionMatches.html">kcompletionmatches</option>, <option value="classKCompTreeNode.html">kcomptreenode</option>, <option value="classKConfig.html">kconfig</option>, <option value="classKConfigBackEnd.html">kconfigbackend</option>, <option value="classKConfigBase.html">kconfigbase</option>, <option value="classKConfigDialogManager.html">kconfigdialogmanager</option>, <option value="classKConfigGroup.html">kconfiggroup</option>, <option value="classKConfigGroupSaver.html">kconfiggroupsaver</option>, <option value="classKConfigINIBackEnd.html">kconfiginibackend</option>, <option value="classKConfigSkeleton.html">kconfigskeleton</option>, <option value="classKConfigSkeleton_1_1ItemBool.html">kconfigskeleton::itembool</option>, <option value="classKConfigSkeleton_1_1ItemColor.html">kconfigskeleton::itemcolor</option>, <option value="classKConfigSkeleton_1_1ItemDateTime.html">kconfigskeleton::itemdatetime</option>, <option value="classKConfigSkeleton_1_1ItemDouble.html">kconfigskeleton::itemdouble</option>, <option value="classKConfigSkeleton_1_1ItemEnum.html">kconfigskeleton::itemenum</option>, <option value="classKConfigSkeleton_1_1ItemFont.html">kconfigskeleton::itemfont</option>, <option value="classKConfigSkeleton_1_1ItemInt.html">kconfigskeleton::itemint</option>, <option value="classKConfigSkeleton_1_1ItemInt64.html">kconfigskeleton::itemint64</option>, <option value="classKConfigSkeleton_1_1ItemIntList.html">kconfigskeleton::itemintlist</option>, <option value="classKConfigSkeleton_1_1ItemLong.html">kconfigskeleton::itemlong</option>, <option value="classKConfigSkeleton_1_1ItemPassword.html">kconfigskeleton::itempassword</option>, <option value="classKConfigSkeleton_1_1ItemPath.html">kconfigskeleton::itempath</option>, <option value="classKConfigSkeleton_1_1ItemPathList.html">kconfigskeleton::itempathlist</option>, <option value="classKConfigSkeleton_1_1ItemPoint.html">kconfigskeleton::itempoint</option>, <option value="classKConfigSkeleton_1_1ItemProperty.html">kconfigskeleton::itemproperty</option>, <option value="classKConfigSkeleton_1_1ItemRect.html">kconfigskeleton::itemrect</option>, <option value="classKConfigSkeleton_1_1ItemSize.html">kconfigskeleton::itemsize</option>, <option value="classKConfigSkeleton_1_1ItemString.html">kconfigskeleton::itemstring</option>, <option value="classKConfigSkeleton_1_1ItemStringList.html">kconfigskeleton::itemstringlist</option>, <option value="classKConfigSkeleton_1_1ItemUInt.html">kconfigskeleton::itemuint</option>, <option value="classKConfigSkeleton_1_1ItemUInt64.html">kconfigskeleton::itemuint64</option>, <option value="classKConfigSkeleton_1_1ItemULong.html">kconfigskeleton::itemulong</option>, <option value="classKConfigSkeletonItem.html">kconfigskeletonitem</option>, <option value="classKCrash.html">kcrash</option>, <option value="classKDCOPPropertyProxy.html">kdcoppropertyproxy</option>, <option value="classKDebugDCOPIface.html">kdebugdcopiface</option>, <option value="classKDesktopFile.html">kdesktopfile</option>, <option value="classKExtendedSocket.html">kextendedsocket</option>, <option value="classKGenericFactory.html">kgenericfactory</option>, <option value="classKGenericFactory_3_01KTypeList_3_01Product_00_01ProductListTail_01_4_00_01KTypeList_3_01Pare1ed8d1e5a9847c99711cad3b12c7e96c.html">kgenericfactory< ktypelist< product, productlisttail >, ktypelist< pare1ed8d1e5a9847c99711cad3b12c7e96c</option>, <option value="classKGenericFactory_3_01KTypeList_3_01Product_00_01ProductListTail_01_4_00_01KTypeList_3_01Paref6a00f76851e0daa2cb662bb8a41fc7f.html">kgenericfactory< ktypelist< product, productlisttail >, ktypelist< paref6a00f76851e0daa2cb662bb8a41fc7f</option>, <option value="classKGenericFactory_3_01KTypeList_3_01Product_00_01ProductListTail_01_4_00_01QObject_01_4.html">kgenericfactory< ktypelist< product, productlisttail >, qobject ></option>, <option value="classKGlobal.html">kglobal</option>, <option value="classKGlobalAccel.html">kglobalaccel</option>, <option value="classKGlobalSettings.html">kglobalsettings</option>, <option value="classKIcon.html">kicon</option>, <option value="classKIconEffect.html">kiconeffect</option>, <option value="classKIconLoader.html">kiconloader</option>, <option value="classKIconTheme.html">kicontheme</option>, <option value="classKInetSocketAddress.html">kinetsocketaddress</option>, <option value="classKInstance.html">kinstance</option>, <option value="classKIOBufferBase.html">kiobufferbase</option>, <option value="classKIPC.html">kipc</option>, <option value="classKKey.html">kkey</option>, <option value="classKKeyNative.html">kkeynative</option>, <option value="classKKeySequence.html">kkeysequence</option>, <option value="classKLibFactory.html">klibfactory</option>, <option value="classKLibLoader.html">klibloader</option>, <option value="classKLibrary.html">klibrary</option>, <option value="classKLocale.html">klocale</option>, <option value="classKLockFile.html">klockfile</option>, <option value="classKMacroExpanderBase.html">kmacroexpanderbase</option>, <option value="classKMD4.html">kmd4</option>, <option value="classKMD5.html">kmd5</option>, <option value="classKMimeSourceFactory.html">kmimesourcefactory</option>, <option value="classKMountPoint.html">kmountpoint</option>, <option value="classKMultipleDrag.html">kmultipledrag</option>, <option value="classKNetwork_1_1KActiveSocketBase.html">knetwork::kactivesocketbase</option>, <option value="classKNetwork_1_1KBufferedSocket.html">knetwork::kbufferedsocket</option>, <option value="classKNetwork_1_1KClientSocketBase.html">knetwork::kclientsocketbase</option>, <option value="classKNetwork_1_1KDatagramPacket.html">knetwork::kdatagrampacket</option>, <option value="classKNetwork_1_1KDatagramSocket.html">knetwork::kdatagramsocket</option>, <option value="classKNetwork_1_1KHttpProxySocketDevice.html">knetwork::khttpproxysocketdevice</option>, <option value="classKNetwork_1_1KInetSocketAddress.html">knetwork::kinetsocketaddress</option>, <option value="classKNetwork_1_1KIpAddress.html">knetwork::kipaddress</option>, <option value="classKNetwork_1_1KMulticastSocket.html">knetwork::kmulticastsocket</option>, <option value="classKNetwork_1_1KMulticastSocketImpl.html">knetwork::kmulticastsocketimpl</option>, <option value="classKNetwork_1_1KNetworkInterface.html">knetwork::knetworkinterface</option>, <option value="classKNetwork_1_1KPassiveSocketBase.html">knetwork::kpassivesocketbase</option>, <option value="classKNetwork_1_1KResolver.html">knetwork::kresolver</option>, <option value="classKNetwork_1_1KResolverEntry.html">knetwork::kresolverentry</option>, <option value="classKNetwork_1_1KResolverResults.html">knetwork::kresolverresults</option>, <option value="classKNetwork_1_1KResolverWorkerBase_1_1ResolverLocker.html">knetwork::kresolverworkerbase::resolverlocker</option>, <option value="classKNetwork_1_1KReverseResolver.html">knetwork::kreverseresolver</option>, <option value="classKNetwork_1_1KServerSocket.html">knetwork::kserversocket</option>, <option value="classKNetwork_1_1KSocketAddress.html">knetwork::ksocketaddress</option>, <option value="classKNetwork_1_1KSocketBase.html">knetwork::ksocketbase</option>, <option value="classKNetwork_1_1KSocketDevice.html">knetwork::ksocketdevice</option>, <option value="classKNetwork_1_1KSocketDeviceFactory.html">knetwork::ksocketdevicefactory</option>, <option value="classKNetwork_1_1KSocksSocketDevice.html">knetwork::ksockssocketdevice</option>, <option value="classKNetwork_1_1KStreamSocket.html">knetwork::kstreamsocket</option>, <option value="classKNetwork_1_1KUnixSocketAddress.html">knetwork::kunixsocketaddress</option>, <option value="classKNotifyClient_1_1Instance.html">knotifyclient::instance</option>, <option value="classKPalette.html">kpalette</option>, <option value="classKPixmapProvider.html">kpixmapprovider</option>, <option value="classKPopupAccelManager.html">kpopupaccelmanager</option>, <option value="classKProcess.html">kprocess</option>, <option value="classKProcessController.html">kprocesscontroller</option>, <option value="classKProcIO.html">kprocio</option>, <option value="classKProtocolInfoFactory.html">kprotocolinfofactory</option>, <option value="classKPty.html">kpty</option>, <option value="classKRandomSequence.html">krandomsequence</option>, <option value="classKRegExp.html">kregexp</option>, <option value="classKRegExpPrivate.html">kregexpprivate</option>, <option value="classKRFCDate.html">krfcdate</option>, <option value="classKRootProp.html">krootprop</option>, <option value="classKSaveFile.html">ksavefile</option>, <option value="classKServerSocket.html">kserversocket</option>, <option value="classKSessionManaged.html">ksessionmanaged</option>, <option value="classKShared.html">kshared</option>, <option value="classKSharedConfig.html">ksharedconfig</option>, <option value="classKSharedPtr.html">ksharedptr</option>, <option value="classKShellProcess.html">kshellprocess</option>, <option value="classKShortcut.html">kshortcut</option>, <option value="classKShortcutList.html">kshortcutlist</option>, <option value="classKSimpleConfig.html">ksimpleconfig</option>, <option value="classKSocket.html">ksocket</option>, <option value="classKSocketAddress.html">ksocketaddress</option>, <option value="classKSocks.html">ksocks</option>, <option value="classKSortableItem.html">ksortableitem</option>, <option value="classKSortableValueList.html">ksortablevaluelist</option>, <option value="classKStandardDirs.html">kstandarddirs</option>, <option value="classKStaticDeleter.html">kstaticdeleter</option>, <option value="classKStaticDeleterBase.html">kstaticdeleterbase</option>, <option value="classKStdAccel_1_1ShortcutList.html">kstdaccel::shortcutlist</option>, <option value="classKStringHandler.html">kstringhandler</option>, <option value="classKSycocaEntry.html">ksycocaentry</option>, <option value="classKSycocaFactoryList.html">ksycocafactorylist</option>, <option value="classKTempDir.html">ktempdir</option>, <option value="classKTempFile.html">ktempfile</option>, <option value="classKTimezone.html">ktimezone</option>, <option value="classKTimezoneDetails.html">ktimezonedetails</option>, <option value="classKTimezones.html">ktimezones</option>, <option value="classKTimezoneSource.html">ktimezonesource</option>, <option value="classKUniqueApplication.html">kuniqueapplication</option>, <option value="classKUnixSocketAddress.html">kunixsocketaddress</option>, <option value="classKURL.html">kurl</option>, <option value="classKURL_1_1List.html">kurl::list</option>, <option value="classKURLDrag.html">kurldrag</option>, <option value="classKUser.html">kuser</option>, <option value="classKUserGroup.html">kusergroup</option>, <option value="classKVMAllocator.html">kvmallocator</option>, <option value="classKWin.html">kwin</option>, <option value="classKWin_1_1WindowInfo.html">kwin::windowinfo</option>, <option value="classKWinModule.html">kwinmodule</option>, <option value="classKWordMacroExpander.html">kwordmacroexpander</option>, <option value="classKXErrorHandler.html">kxerrorhandler</option>, <option value="classKZoneAllocator.html">kzoneallocator</option>, <option value="classNET.html">net</option>,
</select>
</form>
</div>
-->
</div></div>
<div class="menu_box"><h2>API Dox</h2>
<div class="nav_list">
<ul>
<li><a href="../../arts/html/index.html">arts</a></li><li><a href="../../dcop/html/index.html">dcop</a></li><li><a href="../../dnssd/html/index.html">dnssd</a></li><li><a href="../../interfaces/html/index.html">interfaces</a></li><li> <a href="../../interfaces/kimproxy/interface/html/index.html">interface</a></li><li> <a href="../../interfaces/kimproxy/library/html/index.html">library</a></li><li> <a href="../../interfaces/kspeech/html/index.html">kspeech</a></li><li> <a href="../../interfaces/ktexteditor/html/index.html">ktexteditor</a></li><li><a href="../../kabc/html/index.html">kabc</a></li><li><a href="../../kate/html/index.html">kate</a></li><li><a href="../../kcmshell/html/index.html">kcmshell</a></li><li><a href="../../kdecore/html/index.html">kdecore</a></li><li><a href="../../kded/html/index.html">kded</a></li><li><a href="../../kdefx/html/index.html">kdefx</a></li><li><a href="../../kdeprint/html/index.html">kdeprint</a></li><li><a href="../../kdesu/html/index.html">kdesu</a></li><li><a href="../../kdeui/html/index.html">kdeui</a></li><li><a href="../../kdoctools/html/index.html">kdoctools</a></li><li><a href="../../khtml/html/index.html">khtml</a></li><li><a href="../../kimgio/html/index.html">kimgio</a></li><li><a href="../../kinit/html/index.html">kinit</a></li><li><a href="../../kio/html/index.html">kio</a></li><li> <a href="../../kio/bookmarks/html/index.html">bookmarks</a></li><li> <a href="../../kio/httpfilter/html/index.html">httpfilter</a></li><li> <a href="../../kio/kfile/html/index.html">kfile</a></li><li> <a href="../../kio/kio/html/index.html">kio</a></li><li> <a href="../../kio/kioexec/html/index.html">kioexec</a></li><li> <a href="../../kio/kpasswdserver/html/index.html">kpasswdserver</a></li><li> <a href="../../kio/kssl/html/index.html">kssl</a></li><li><a href="../../kioslave/html/index.html">kioslave</a></li><li> <a href="../../kioslave/http/html/index.html">http</a></li><li><a href="../../kjs/html/index.html">kjs</a></li><li><a href="../../kmdi/html/index.html">kmdi</a></li><li> <a href="../../kmdi/kmdi/html/index.html">kmdi</a></li><li><a href="../../knewstuff/html/index.html">knewstuff</a></li><li><a href="../../kparts/html/index.html">kparts</a></li><li><a href="../../kresources/html/index.html">kresources</a></li><li><a href="../../kspell2/html/index.html">kspell2</a></li><li><a href="../../kunittest/html/index.html">kunittest</a></li><li><a href="../../kutils/html/index.html">kutils</a></li><li><a href="../../kwallet/html/index.html">kwallet</a></li><li><a href="../../libkmid/html/index.html">libkmid</a></li><li><a href="../../libkscreensaver/html/index.html">libkscreensaver</a></li>
</ul></div></div>
</td>
</tr>
</table>
<span class="doNotDisplay">
<a href="http://www.kde.org/" accesskey="8">KDE Home</a> |
<a href="http://accessibility.kde.org/" accesskey="9">KDE Accessibility Home</a> |
<a href="http://www.kde.org/media/accesskeys.php" accesskey="0">Description of Access Keys</a>
</span>
<div style="height: 8px"></div>
<div id="footer">
<div id="footer_left">
Maintained by <a href="mailto:groot@kde.org">Adriaan de Groot</a>
and
<a href="mailto:winter@kde.org">Allen Winter</a>.
<br/>
KDE and K Desktop Environment are trademarks of <a href="http://www.kde.org/areas/kde-ev/" title="Homepage of the KDE non-profit Organization">KDE e.V.</a> |
<a href="http://www.kde.org/contact/impressum.php">Legal</a>
</div>
<div id="footer_right"><img src="/media/images/footer_right.png" style="margin: 0px" alt="" /></div>
</div>
<!--
WARNING: DO NOT SEND MAIL TO THE FOLLOWING EMAIL ADDRESS! YOU WILL
BE BLOCKED INSTANTLY AND PERMANENTLY!
<a href="mailto:aaaatrap-425acc3b5374943f@kde.org">Block me</a>
WARNING END
-->
</body>
</html>
