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<div class="title">kallocator.cpp</div> </div>
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<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"> Copyright (C) 2002 Michael Matz (matz@kde.org)</span>
<a name="l00006"></a>00006 <span class="comment"></span>
<a name="l00007"></a>00007 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00008"></a>00008 <span class="comment"> modify it under the terms of the GNU Library General Public</span>
<a name="l00009"></a>00009 <span class="comment"> License as published by the Free Software Foundation; either</span>
<a name="l00010"></a>00010 <span class="comment"> version 2 of the License, or (at your option) any later version.</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00015"></a>00015 <span class="comment"> Library General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"></span>
<a name="l00017"></a>00017 <span class="comment"> You should have received a copy of the GNU Library General Public License</span>
<a name="l00018"></a>00018 <span class="comment"> along with this library; see the file COPYING.LIB. If not, write to</span>
<a name="l00019"></a>00019 <span class="comment"> the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span>
<a name="l00020"></a>00020 <span class="comment"> Boston, MA 02110-1301, USA.</span>
<a name="l00021"></a>00021 <span class="comment">*/</span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="comment">/* Fast zone memory allocator with deallocation support, for use as obstack</span>
<a name="l00024"></a>00024 <span class="comment"> or as general purpose allocator. It does no compaction. If the usage</span>
<a name="l00025"></a>00025 <span class="comment"> pattern is non-optimal it might waste some memory while running. E.g.</span>
<a name="l00026"></a>00026 <span class="comment"> allocating many small things at once, and then deallocating only every</span>
<a name="l00027"></a>00027 <span class="comment"> second one, there is a high chance, that actually no memory is freed. */</span>
<a name="l00028"></a>00028 <span class="comment">// $Id: kallocator.cpp 477382 2005-11-03 23:41:16Z adridg $</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#include "kallocator.h"</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <kdebug.h></span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">class </span>KZoneAllocator::MemBlock
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="keyword">public</span>:
<a name="l00036"></a>00036 MemBlock(<span class="keywordtype">size_t</span> s) : size(s), ref(0), older(0), newer(0)
<a name="l00037"></a>00037 { begin = <span class="keyword">new</span> <span class="keywordtype">char</span>[s]; }
<a name="l00038"></a>00038 ~MemBlock() { <span class="keyword">delete</span> [] begin; }
<a name="l00039"></a>00039 <span class="keywordtype">bool</span> is_in(<span class="keywordtype">void</span> *ptr)<span class="keyword"> const </span>{<span class="keywordflow">return</span> !(begin > (<span class="keywordtype">char</span> *)ptr
<a name="l00040"></a>00040 || (begin + size) <= (<span class="keywordtype">char</span> *)ptr); }
<a name="l00041"></a>00041 <span class="keywordtype">size_t</span> size;
<a name="l00042"></a>00042 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ref;
<a name="l00043"></a>00043 <span class="keywordtype">char</span> *begin;
<a name="l00044"></a>00044 MemBlock *older;
<a name="l00045"></a>00045 MemBlock *newer;
<a name="l00046"></a>00046 };
<a name="l00047"></a>00047
<a name="l00048"></a><a class="code" href="classKZoneAllocator.html#a36b961a7b14aa89d38b6bbbc872b858f">00048</a> <a class="code" href="classKZoneAllocator.html#a36b961a7b14aa89d38b6bbbc872b858f" title="Creates a KZoneAllocator object.">KZoneAllocator::KZoneAllocator</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> _blockSize)
<a name="l00049"></a>00049 : currentBlock(0), blockSize(1), blockOffset(0), log2(0), num_blocks(0),
<a name="l00050"></a>00050 hashList(0), hashSize(0), hashDirty(true)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 <span class="keywordflow">while</span> (<a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a> < _blockSize)
<a name="l00053"></a>00053 <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a> <<= 1, <a class="code" href="classKZoneAllocator.html#aa906b3634355596aee652978112db366" title="base-2 log of the block size.">log2</a>++;
<a name="l00054"></a>00054 <span class="comment">/* Make sure, that a block is allocated at the first time allocate()</span>
<a name="l00055"></a>00055 <span class="comment"> is called (even with a 0 size). */</span>
<a name="l00056"></a>00056 <a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a> = <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a> + 1;
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a><a class="code" href="classKZoneAllocator.html#ae33bc3b19e245154c594b24cf547dfdc">00059</a> <a class="code" href="classKZoneAllocator.html#ae33bc3b19e245154c594b24cf547dfdc" title="Destructs the ZoneAllocator and free all memory allocated by it.">KZoneAllocator::~KZoneAllocator</a>()
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> count = 0;
<a name="l00062"></a>00062 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>) {
<a name="l00063"></a>00063 <span class="comment">/* No need to maintain the different lists in hashList[] anymore.</span>
<a name="l00064"></a>00064 <span class="comment"> I.e. no need to use delBlock(). */</span>
<a name="l00065"></a>00065 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i < <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a>; i++)
<a name="l00066"></a>00066 <span class="keyword">delete</span> <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[i];
<a name="l00067"></a>00067 <span class="keyword">delete</span> [] <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>;
<a name="l00068"></a>00068 <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a> = 0;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070 MemBlock *next;
<a name="l00071"></a>00071 <span class="keywordflow">for</span> (; <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>; <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a> = next) {
<a name="l00072"></a>00072 next = <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>->older;
<a name="l00073"></a>00073 <span class="keyword">delete</span> <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>;
<a name="l00074"></a>00074 count++;
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076 <span class="preprocessor">#ifndef NDEBUG // as this is called quite late in the app, we don't care</span>
<a name="l00077"></a>00077 <span class="preprocessor"></span> <span class="comment">// to use kdDebug</span>
<a name="l00078"></a>00078 <span class="keywordflow">if</span> (count > 1)
<a name="l00079"></a>00079 qDebug(<span class="stringliteral">"zone still contained %d blocks"</span>, count);
<a name="l00080"></a>00080 <span class="preprocessor">#endif</span>
<a name="l00081"></a>00081 <span class="preprocessor"></span>}
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="keywordtype">void</span> KZoneAllocator::insertHash(MemBlock *b)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> adr = ((<span class="keywordtype">unsigned</span> long)b->begin) & (~(<a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a> - 1));
<a name="l00086"></a>00086 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> end = ((<span class="keywordtype">unsigned</span> long)b->begin) + <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>;
<a name="l00087"></a>00087 <span class="keywordflow">while</span> (adr < end) {
<a name="l00088"></a>00088 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> key = adr >> <a class="code" href="classKZoneAllocator.html#aa906b3634355596aee652978112db366" title="base-2 log of the block size.">log2</a>;
<a name="l00089"></a>00089 key = key & (<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> - 1);
<a name="l00090"></a>00090 <span class="keywordflow">if</span> (!<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[key])
<a name="l00091"></a>00091 <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[key] = <span class="keyword">new</span> <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock *></a>;
<a name="l00092"></a>00092 <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[key]-><a class="codeRef" href="qvaluelist.html#append">append</a>(b);
<a name="l00093"></a>00093 adr += <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00102"></a><a class="code" href="classKZoneAllocator.html#ab6d37b990beb809892767e9f170da1d3">00102</a> <span class="keywordtype">void</span> <a class="code" href="classKZoneAllocator.html#ab6d37b990beb809892767e9f170da1d3" title="Add a new memory block to the pool of blocks, and reorganize the hash lists if needed.">KZoneAllocator::addBlock</a>(MemBlock *b)
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 b->newer = 0;
<a name="l00105"></a>00105 b->older = <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>;
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>)
<a name="l00107"></a>00107 b->older->newer = b;
<a name="l00108"></a>00108 <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a> = b;
<a name="l00109"></a>00109 <a class="code" href="classKZoneAllocator.html#aa60ffb8beb73c9f60e4bc21a5226a7c9" title="Count total number of allocated blocks.">num_blocks</a>++;
<a name="l00110"></a>00110 <span class="comment">/* If we either have no hashList at all, or since it's last construction</span>
<a name="l00111"></a>00111 <span class="comment"> there are now many more blocks we reconstruct the list. But don't</span>
<a name="l00112"></a>00112 <span class="comment"> make it larger than a certain maximum. */</span>
<a name="l00113"></a>00113 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a> && ((<a class="code" href="classKZoneAllocator.html#aa60ffb8beb73c9f60e4bc21a5226a7c9" title="Count total number of allocated blocks.">num_blocks</a> / 4) > <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> && <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> < 64*1024))
<a name="l00114"></a>00114 <a class="code" href="classKZoneAllocator.html#a810875a1bce9300ac724e0f0f2a53653" title="Flag the hashes as in need of reorganization.">hashDirty</a> = <span class="keyword">true</span>;
<a name="l00115"></a>00115 <span class="comment">/* Only insert this block into the hashlists, if we aren't going to</span>
<a name="l00116"></a>00116 <span class="comment"> reconstruct them anyway. */</span>
<a name="l00117"></a>00117 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a> && !<a class="code" href="classKZoneAllocator.html#a810875a1bce9300ac724e0f0f2a53653" title="Flag the hashes as in need of reorganization.">hashDirty</a>)
<a name="l00118"></a>00118 insertHash (b);
<a name="l00119"></a>00119 }
<a name="l00120"></a>00120
<a name="l00122"></a><a class="code" href="classKZoneAllocator.html#a29f094ce4053e4e8af1ff1826da69e65">00122</a> <span class="keywordtype">void</span> <a class="code" href="classKZoneAllocator.html#a29f094ce4053e4e8af1ff1826da69e65" title="Reinitialize hash list.">KZoneAllocator::initHash</a>()
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>) {
<a name="l00125"></a>00125 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i < <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a>; i++)
<a name="l00126"></a>00126 <span class="keyword">delete</span> <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[i];
<a name="l00127"></a>00127 <span class="keyword">delete</span> [] <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>;
<a name="l00128"></a>00128 <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a> = 0;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> = 1;
<a name="l00131"></a>00131 <span class="keywordflow">while</span> (<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> < <a class="code" href="classKZoneAllocator.html#aa60ffb8beb73c9f60e4bc21a5226a7c9" title="Count total number of allocated blocks.">num_blocks</a>)
<a name="l00132"></a>00132 <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> <<= 1;
<a name="l00133"></a>00133 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> < 1024)
<a name="l00134"></a>00134 <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> = 1024;
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> > 64*1024)
<a name="l00136"></a>00136 <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> = 64*1024;
<a name="l00137"></a>00137 <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a> = <span class="keyword">new</span> <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock *></a> *[<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a>];
<a name="l00138"></a>00138 memset (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>, 0, <span class="keyword">sizeof</span>(<a class="codeRef" href="qvaluelist.html">QValueList<MemBlock*></a> *) * <a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a>);
<a name="l00139"></a>00139 <a class="code" href="classKZoneAllocator.html#a810875a1bce9300ac724e0f0f2a53653" title="Flag the hashes as in need of reorganization.">hashDirty</a> = <span class="keyword">false</span>;
<a name="l00140"></a>00140 <span class="keywordflow">for</span> (MemBlock *b = <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>; b; b = b->older)
<a name="l00141"></a>00141 insertHash(b);
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00148"></a><a class="code" href="classKZoneAllocator.html#a3101ba3b2cf87452eec21a5cb56ec9b9">00148</a> <span class="keywordtype">void</span> <a class="code" href="classKZoneAllocator.html#a3101ba3b2cf87452eec21a5cb56ec9b9" title="Delete a memory block.">KZoneAllocator::delBlock</a>(MemBlock *b)
<a name="l00149"></a>00149 {
<a name="l00150"></a>00150 <span class="comment">/* Update also the hashlists if we aren't going to reconstruct them</span>
<a name="l00151"></a>00151 <span class="comment"> soon. */</span>
<a name="l00152"></a>00152 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a> && !<a class="code" href="classKZoneAllocator.html#a810875a1bce9300ac724e0f0f2a53653" title="Flag the hashes as in need of reorganization.">hashDirty</a>) {
<a name="l00153"></a>00153 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> adr = ((<span class="keywordtype">unsigned</span> long)b->begin) & (~(<a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a> - 1));
<a name="l00154"></a>00154 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> end = ((<span class="keywordtype">unsigned</span> long)b->begin) + <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>;
<a name="l00155"></a>00155 <span class="keywordflow">while</span> (adr < end) {
<a name="l00156"></a>00156 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> key = adr >> <a class="code" href="classKZoneAllocator.html#aa906b3634355596aee652978112db366" title="base-2 log of the block size.">log2</a>;
<a name="l00157"></a>00157 key = key & (<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> - 1);
<a name="l00158"></a>00158 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[key]) {
<a name="l00159"></a>00159 <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock *></a> *list = <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[key];
<a name="l00160"></a>00160 <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock *>::Iterator</a> it = list-><a class="codeRef" href="qvaluelist.html#begin">begin</a>();
<a name="l00161"></a>00161 <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock *>::Iterator</a> endit = list-><a class="codeRef" href="qvaluelist.html#end">end</a>();
<a name="l00162"></a>00162 <span class="keywordflow">for</span> (; it != endit; ++it)
<a name="l00163"></a>00163 <span class="keywordflow">if</span> (*it == b) {
<a name="l00164"></a>00164 list-><a class="codeRef" href="qvaluelist.html#remove">remove</a>(it);
<a name="l00165"></a>00165 <span class="keywordflow">break</span>;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168 adr += <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>;
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171 <span class="keywordflow">if</span> (b->older)
<a name="l00172"></a>00172 b->older->newer = b->newer;
<a name="l00173"></a>00173 <span class="keywordflow">if</span> (b->newer)
<a name="l00174"></a>00174 b->newer->older = b->older;
<a name="l00175"></a>00175 <span class="keywordflow">if</span> (b == <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>) {
<a name="l00176"></a>00176 <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a> = 0;
<a name="l00177"></a>00177 <a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a> = <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>;
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179 <span class="keyword">delete</span> b;
<a name="l00180"></a>00180 <a class="code" href="classKZoneAllocator.html#aa60ffb8beb73c9f60e4bc21a5226a7c9" title="Count total number of allocated blocks.">num_blocks</a>--;
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182
<a name="l00183"></a>00183 <span class="keywordtype">void</span> *
<a name="l00184"></a><a class="code" href="classKZoneAllocator.html#a90dc4c5de42a9156b1910992f0ccd986">00184</a> <a class="code" href="classKZoneAllocator.html#a90dc4c5de42a9156b1910992f0ccd986" title="Allocates a memory block.">KZoneAllocator::allocate</a>(<span class="keywordtype">size_t</span> _size)
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186 <span class="comment">// Use the size of (void *) as alignment</span>
<a name="l00187"></a>00187 <span class="keyword">const</span> <span class="keywordtype">size_t</span> alignment = <span class="keyword">sizeof</span>(<span class="keywordtype">void</span> *) - 1;
<a name="l00188"></a>00188 _size = (_size + alignment) & ~alignment;
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <span class="keywordflow">if</span> ((<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>) _size + <a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a> > <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>)
<a name="l00191"></a>00191 {
<a name="l00192"></a>00192 <span class="keywordflow">if</span> (_size > <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>) {
<a name="l00193"></a>00193 qDebug(<span class="stringliteral">"KZoneAllocator: allocating more than %lu bytes"</span>, <a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>);
<a name="l00194"></a>00194 <span class="keywordflow">return</span> 0;
<a name="l00195"></a>00195 }
<a name="l00196"></a>00196 <a class="code" href="classKZoneAllocator.html#ab6d37b990beb809892767e9f170da1d3" title="Add a new memory block to the pool of blocks, and reorganize the hash lists if needed.">addBlock</a>(<span class="keyword">new</span> MemBlock(<a class="code" href="classKZoneAllocator.html#a3f5a6692ae40161475fa73997e0b6341" title="Store block size from constructor.">blockSize</a>));
<a name="l00197"></a>00197 <a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a> = 0;
<a name="l00198"></a>00198 <span class="comment">//qDebug ("Allocating block #%d (%x)\n", num_blocks, currentBlock->begin);</span>
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200 <span class="keywordtype">void</span> *result = (<span class="keywordtype">void</span> *)(<a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>->begin+<a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a>);
<a name="l00201"></a>00201 <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>->ref++;
<a name="l00202"></a>00202 <a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a> += _size;
<a name="l00203"></a>00203 <span class="keywordflow">return</span> result;
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="keywordtype">void</span>
<a name="l00207"></a><a class="code" href="classKZoneAllocator.html#aed8801cd9c71f6c15dec2fc49ebdf22b">00207</a> <a class="code" href="classKZoneAllocator.html#aed8801cd9c71f6c15dec2fc49ebdf22b" title="Gives back a block returned by allocate() to the zone allocator, and possibly deallocates the block h...">KZoneAllocator::deallocate</a>(<span class="keywordtype">void</span> *ptr)
<a name="l00208"></a>00208 {
<a name="l00209"></a>00209 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a810875a1bce9300ac724e0f0f2a53653" title="Flag the hashes as in need of reorganization.">hashDirty</a>)
<a name="l00210"></a>00210 <a class="code" href="classKZoneAllocator.html#a29f094ce4053e4e8af1ff1826da69e65" title="Reinitialize hash list.">initHash</a>();
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> key = (((<span class="keywordtype">unsigned</span> long)ptr) >> <a class="code" href="classKZoneAllocator.html#aa906b3634355596aee652978112db366" title="base-2 log of the block size.">log2</a>) & (<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> - 1);
<a name="l00213"></a>00213 <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock *></a> *list = <a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a>[key];
<a name="l00214"></a>00214 <span class="keywordflow">if</span> (!list) {
<a name="l00215"></a>00215 <span class="comment">/* Can happen with certain usage pattern of intermixed free_since()</span>
<a name="l00216"></a>00216 <span class="comment"> and deallocate(). */</span>
<a name="l00217"></a>00217 <span class="comment">//qDebug("Uhoh");</span>
<a name="l00218"></a>00218 <span class="keywordflow">return</span>;
<a name="l00219"></a>00219 }
<a name="l00220"></a>00220 <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock*>::ConstIterator</a> it = list-><a class="codeRef" href="qvaluelist.html#begin">begin</a>();
<a name="l00221"></a>00221 <a class="codeRef" href="qvaluelist.html">QValueList<MemBlock*>::ConstIterator</a> endit = list-><a class="codeRef" href="qvaluelist.html#end">end</a>();
<a name="l00222"></a>00222 <span class="keywordflow">for</span> (; it != endit; ++it) {
<a name="l00223"></a>00223 MemBlock *cur = *it;
<a name="l00224"></a>00224 <span class="keywordflow">if</span> (cur->is_in(ptr)) {
<a name="l00225"></a>00225 <span class="keywordflow">if</span> (!--cur->ref) {
<a name="l00226"></a>00226 <span class="keywordflow">if</span> (cur != <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>)
<a name="l00227"></a>00227 <a class="code" href="classKZoneAllocator.html#a3101ba3b2cf87452eec21a5cb56ec9b9" title="Delete a memory block.">delBlock</a> (cur);
<a name="l00228"></a>00228 <span class="keywordflow">else</span>
<a name="l00229"></a>00229 <a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a> = 0;
<a name="l00230"></a>00230 }
<a name="l00231"></a>00231 <span class="keywordflow">return</span>;
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234 <span class="comment">/* Can happen with certain usage pattern of intermixed free_since()</span>
<a name="l00235"></a>00235 <span class="comment"> and deallocate(). */</span>
<a name="l00236"></a>00236 <span class="comment">//qDebug("Uhoh2");</span>
<a name="l00237"></a>00237 }
<a name="l00238"></a>00238
<a name="l00239"></a>00239 <span class="keywordtype">void</span>
<a name="l00240"></a><a class="code" href="classKZoneAllocator.html#a1a55d13715013aa84706510dbfaedf02">00240</a> <a class="code" href="classKZoneAllocator.html#a1a55d13715013aa84706510dbfaedf02" title="Deallocate many objects at once.">KZoneAllocator::free_since</a>(<span class="keywordtype">void</span> *ptr)
<a name="l00241"></a>00241 {
<a name="l00242"></a>00242 <span class="comment">/* If we have a hashList and it's not yet dirty, see, if we will dirty</span>
<a name="l00243"></a>00243 <span class="comment"> it by removing too many blocks. This will make the below delBlock()s</span>
<a name="l00244"></a>00244 <span class="comment"> faster. */</span>
<a name="l00245"></a>00245 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#a9a46307f207a6e47ba7692c638b21c72" title="Collection of lists of blocks, for lookups.">hashList</a> && !<a class="code" href="classKZoneAllocator.html#a810875a1bce9300ac724e0f0f2a53653" title="Flag the hashes as in need of reorganization.">hashDirty</a>)
<a name="l00246"></a>00246 {
<a name="l00247"></a>00247 <span class="keyword">const</span> MemBlock *b;
<a name="l00248"></a>00248 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> removed = 0;
<a name="l00249"></a>00249 <span class="keywordflow">for</span> (b = <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>; b; b = b->older, removed++)
<a name="l00250"></a>00250 <span class="keywordflow">if</span> (b->is_in (ptr))
<a name="l00251"></a>00251 <span class="keywordflow">break</span>;
<a name="l00252"></a>00252 <span class="keywordflow">if</span> (<a class="code" href="classKZoneAllocator.html#ab05085be35977ce615fea3d2a564b10c" title="Count of hashes.">hashSize</a> >= 4 * (<a class="code" href="classKZoneAllocator.html#aa60ffb8beb73c9f60e4bc21a5226a7c9" title="Count total number of allocated blocks.">num_blocks</a> - removed))
<a name="l00253"></a>00253 <a class="code" href="classKZoneAllocator.html#a810875a1bce9300ac724e0f0f2a53653" title="Flag the hashes as in need of reorganization.">hashDirty</a> = <span class="keyword">true</span>;
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255 <span class="keywordflow">while</span> (<a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a> && !<a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>->is_in(ptr)) {
<a name="l00256"></a>00256 <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a> = <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>->older;
<a name="l00257"></a>00257 <a class="code" href="classKZoneAllocator.html#a3101ba3b2cf87452eec21a5cb56ec9b9" title="Delete a memory block.">delBlock</a> (<a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>->newer);
<a name="l00258"></a>00258 }
<a name="l00259"></a>00259 <a class="code" href="classKZoneAllocator.html#a80f8f721a695e79f102e4b92c363398c" title="Store offset into current block; size-offset is free.">blockOffset</a> = ((<span class="keywordtype">char</span>*)ptr) - <a class="code" href="classKZoneAllocator.html#a48f3981f6c908084498e9242ec52848b" title="One block is 'current' to satisfy requests.">currentBlock</a>->begin;
<a name="l00260"></a>00260 }
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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 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