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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 &lt;list&gt;</font>
00031 <font class="preprocessor">#include &lt;vector&gt;</font>
00032 
00033 <font class="keyword">namespace </font>NLMISC 
00034 {
00035 
00036 
00048 <font class="keyword">template</font>&lt;<font class="keyword">class</font> T&gt;
<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()) &amp;&amp; (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>-&gt;size()&gt;=<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>-&gt;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>-&gt;resize (<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>-&gt;size()+1);
00093 
00094                 <font class="comment">// Return the pointer</font>
00095                 <font class="keywordflow">return</font> &amp;*((<a class="code" href="classNLMISC_1_1CPoolMemory.html#o2">_BlockPointer</a>-&gt;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&lt; std::vector&lt;T&gt;</a> &gt;::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-&gt;clear ();
00108 
00109                         <font class="comment">// Check size in not zero</font>
00110                         <a class="code" href="debug_8h.html#a6">nlassert</a> (ite-&gt;capacity ()&gt;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&lt; std::vector&lt;T&gt;</a> &gt;                             <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&lt; std::vector&lt;T&gt;</a> &gt;::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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