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doxygen="_cgi:http://www.nevrax.org/cgi-bin/nel-search.cgi" href="http://www.nevrax.org/cgi-bin/nel-search.cgi">Search</a> </center> +<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> + +<!-- footer --> +<BR><FONT Size=+5> </FONT> +</TD> +<TD WIDTH=15><IMG SRC=http://www.nevrax.org/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD> +</TR> +</TABLE> +</BODY> +</HTML> |