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<hr><h1>pool_memory.h</h1><a href="pool__memory_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025
00026 <font class="preprocessor">#ifndef NL_POOL_MEMORY_H</font>
00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_POOL_MEMORY_H</font>
00028 <font class="preprocessor"></font>
00029 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font>
00030 <font class="preprocessor">#include <list></font>
00031 <font class="preprocessor">#include <vector></font>
00032
00033 <font class="keyword">namespace </font>NLMISC
00034 {
00035
00036
00048 <font class="keyword">template</font><<font class="keyword">class</font> T>
<a name="l00049"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html">00049</a> <font class="keyword">class </font>CPoolMemory
00050 {
00051 <font class="keyword">public</font>:
00052 <font class="comment">/*</font>
00053 <font class="comment"> * Constructor</font>
00054 <font class="comment"> *</font>
00055 <font class="comment"> * \param blockSize is the default bloc size</font>
00056 <font class="comment"> */</font>
<a name="l00057"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html#a0">00057</a> <a class="code" href="classNLMISC_1_1CPoolMemory.html#a0">CPoolMemory</a> (uint blockSize=10)
00058 {
00059 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o0">_BlockSize</a>=blockSize;
00060 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.end();
00061 }
00062
00063 <font class="comment">/*</font>
00064 <font class="comment"> * Allocate an element.</font>
00065 <font class="comment"> *</font>
00066 <font class="comment"> * Return a pointer on the element.</font>
00067 <font class="comment"> */</font>
<a name="l00068"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html#a1">00068</a> T* <a class="code" href="classNLMISC_1_1CPoolMemory.html#a1">allocate</a> ()
00069 {
00070 <font class="comment">// End of block ?</font>
00071 <font class="keywordflow">if</font> ( (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>!=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.end()) && (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>->size()>=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o0">_BlockSize</a>) )
00072 {
00073 <font class="comment">// Get next block</font>
00074 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>++;
00075 }
00076
00077 <font class="comment">// Out of memory ?</font>
00078 <font class="keywordflow">if</font> (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>==<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.end())
00079 {
00080 <font class="comment">// Add a block</font>
00081 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.resize (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.size()+1);
00082
00083 <font class="comment">// Pointer on the new block</font>
00084 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.end ();
00085 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>--;
00086
00087 <font class="comment">// Reserve it</font>
00088 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>->reserve (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o0">_BlockSize</a>);
00089 }
00090
00091 <font class="comment">// Allocate</font>
00092 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>->resize (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>->size()+1);
00093
00094 <font class="comment">// Return the pointer</font>
00095 <font class="keywordflow">return</font> &*((<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>->end ()-1));
00096 }
00097
00098 <font class="comment">/*</font>
00099 <font class="comment"> * Free all the elements allocated since last free(). Memory is kept for next allocations.</font>
00100 <font class="comment"> */</font>
<a name="l00101"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html#a2">00101</a> <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CPoolMemory.html#a2">free</a> ()
00102 {
00103 <a class="code" href="classstd_1_1list.html">std::list< std::vector<T></a> >::iterator ite=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.begin();
00104 <font class="keywordflow">while</font> (ite!=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.end())
00105 {
00106 <font class="comment">// Clear the block</font>
00107 ite->clear ();
00108
00109 <font class="comment">// Check size in not zero</font>
00110 <a class="code" href="debug_8h.html#a6">nlassert</a> (ite->capacity ()>0);
00111
00112 ite++;
00113 }
00114 <font class="comment">// Pointer at the begining</font>
00115 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.begin();
00116 }
00117
00118 <font class="comment">/*</font>
00119 <font class="comment"> * Purge memory. All the memory used by the allocator is freid for real.</font>
00120 <font class="comment"> */</font>
<a name="l00121"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html#a3">00121</a> <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CPoolMemory.html#a3">purge</a> ()
00122 {
00123 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.clear();
00124 <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>=<a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>.end();
00125 }
00126
00127 <font class="keyword">private</font>:
<a name="l00128"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html#o0">00128</a> uint <a class="code" href="classNLMISC_1_1CPoolMemory.html#o0">_BlockSize</a>;
<a name="l00129"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">00129</a> <a class="code" href="classstd_1_1list.html">std::list< std::vector<T></a> > <a class="code" href="classNLMISC_1_1CPoolMemory.html#o1">_BlockList</a>;
<a name="l00130"></a><a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">00130</a> <a class="code" href="classstd_1_1list.html">std::list< std::vector<T></a> >::iterator <a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>;
00131 };
00132
00133
00134 } <font class="comment">// NLMISC</font>
00135
00136
00137 <font class="preprocessor">#endif // NL_POOL_MEMORY_H</font>
00138 <font class="preprocessor"></font>
00139 <font class="comment">/* End of pool_memory.h */</font>
</pre></div>
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