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<hr><h1>block_memory.h</h1><a href="block__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_BLOCK_MEMORY_H</font>
00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_BLOCK_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 <font class="preprocessor">#include "<a class="code" href="debug_8h.html">nel/misc/debug.h</a>"</font>
00033
00034
00035 <font class="keyword">namespace </font>NLMISC
00036 {
00037
00038
00039 <font class="comment">// ***************************************************************************</font>
00041 <font class="comment">extern bool NL3D_BlockMemoryAssertOnPurge; // =true.</font>
00042
00043
00044 <font class="comment">// ***************************************************************************</font>
00063 <font class="comment"></font><font class="keyword">template</font><<font class="keyword">class</font> T, <font class="keywordtype">bool</font> __ctor_dtor__= true >
<a name="l00064"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html">00064</a> <font class="keyword">class </font>CBlockMemory
00065 {
00066 <font class="keyword">public</font>:
00067
<a name="l00069"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a0">00069</a> <a class="code" href="classNLMISC_1_1CBlockMemory.html#a0">CBlockMemory</a>(uint blockSize= 16)
00070 {
00071 <a class="code" href="debug_8h.html#a6">nlassert</a>(blockSize);
00072 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o0">_BlockSize</a>= blockSize;
00073 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>= std::max(<font class="keyword">sizeof</font>(T), <font class="keyword">sizeof</font>(<font class="keywordtype">void</font>*));
00074 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>= NULL;
00075 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>= 0;
00076 }
00077 <font class="comment">// just copy setup from other blockMemory, don't copy data!</font>
<a name="l00078"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a1">00078</a> <a class="code" href="classNLMISC_1_1CBlockMemory.html#a0">CBlockMemory</a>(<font class="keyword">const</font> CBlockMemory<T, __ctor_dtor__> &other)
00079 {
00080 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o0">_BlockSize</a>= other._BlockSize;
00081 <font class="comment">// if other block is rebinded, don't copy its rebinded size.</font>
00082 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>= std::max(<font class="keyword">sizeof</font>(T), <font class="keyword">sizeof</font>(<font class="keywordtype">void</font>*));
00083 <font class="comment">// No elts allocated</font>
00084 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>= NULL;
00085 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>= 0;
00086 }
<a name="l00089"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a2">00089</a> <a class="code" href="classNLMISC_1_1CBlockMemory.html#a2">~CBlockMemory</a>()
00090 {
00091 <a class="code" href="classNLMISC_1_1CBlockMemory.html#a5">purge</a>();
00092 }
00093
00094
<a name="l00096"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a3">00096</a> T* <a class="code" href="classNLMISC_1_1CBlockMemory.html#a3">allocate</a>()
00097 {
00098 <font class="comment">// if not enough memory, aloc a block.</font>
00099 <font class="keywordflow">if</font>(!<a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>)
00100 {
00101 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.push_front(CBlock());
00102 <a class="code" href="classNLMISC_1_1CBlockMemory.html#c0">buildBlock</a>(*<a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.begin());
00103 <font class="comment">// new free elt points to the beginning of this block.</font>
00104 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>= (*<a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.begin()).Data;
00105 <font class="preprocessor">#ifdef NL_DEBUG</font>
00106 <font class="preprocessor"></font> <font class="comment">// if debug, must decal for begin check.</font>
00107 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>= (uint32*)<a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a> + 1;
00108 <font class="preprocessor">#endif</font>
00109 <font class="preprocessor"></font> }
00110
00111 <font class="comment">// choose next free elt.</font>
00112 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>);
00113 T* ret= (T*)<a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>;
00114
00115 <font class="comment">// update _NextFreeElt, so it points to the next free element.</font>
00116 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>= *(<font class="keywordtype">void</font>**)<a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>;
00117
00118 <font class="comment">// construct the allocated element.</font>
00119 <font class="keywordflow">if</font>( __ctor_dtor__ )
00120 <font class="preprocessor">#undef new</font>
00121 <font class="preprocessor"></font> <font class="keyword">new</font> (ret) T;
00122 <font class="preprocessor">#define new NL_NEW</font>
00123 <font class="preprocessor"></font>
00124
00125 <font class="comment">// some simple Check.</font>
00126 <font class="preprocessor">#ifdef NL_DEBUG</font>
00127 <font class="preprocessor"></font> uint32 *checkStart= (uint32*)(<font class="keywordtype">void</font>*)ret-1;
00128 uint32 *checkEnd = (uint32*)((uint8*)(<font class="keywordtype">void</font>*)ret+<a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>);
00129 <a class="code" href="debug_8h.html#a6">nlassert</a>( *checkStart == <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u1">CheckDeletedIdent</a>);
00130 <a class="code" href="debug_8h.html#a6">nlassert</a>( *checkEnd == <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u1">CheckDeletedIdent</a>);
00131 <font class="comment">// if ok, mark this element as allocated.</font>
00132 *checkStart= <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u0">CheckAllocatedIdent</a>;
00133 *checkEnd = <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u0">CheckAllocatedIdent</a>;
00134 <font class="preprocessor">#endif</font>
00135 <font class="preprocessor"></font>
00136 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>++;
00137 <font class="keywordflow">return</font> ret;
00138 }
00139
<a name="l00141"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a4">00141</a> <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CBlockMemory.html#a4">free</a>(T* ptr)
00142 {
00143 <font class="keywordflow">if</font>(!ptr)
00144 <font class="keywordflow">return</font>;
00145 <font class="comment">// some simple Check.</font>
00146 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>>0);
00147 <font class="preprocessor">#ifdef NL_DEBUG</font>
00148 <font class="preprocessor"></font> uint32 *checkStart= (uint32*)(<font class="keywordtype">void</font>*)ptr-1;
00149 uint32 *checkEnd = (uint32*)((uint8*)(<font class="keywordtype">void</font>*)ptr+<a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>);
00150 <a class="code" href="debug_8h.html#a6">nlassert</a>( *checkStart == <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u0">CheckAllocatedIdent</a>);
00151 <a class="code" href="debug_8h.html#a6">nlassert</a>( *checkEnd == <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u0">CheckAllocatedIdent</a>);
00152 <font class="comment">// if ok, mark this element as deleted.</font>
00153 *checkStart= <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u1">CheckDeletedIdent</a>;
00154 *checkEnd = <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u1">CheckDeletedIdent</a>;
00155 <font class="preprocessor">#endif</font>
00156 <font class="preprocessor"></font>
00157 <font class="comment">// destruct the element.</font>
00158 <font class="keywordflow">if</font>( __ctor_dtor__ )
00159 ptr->~T();
00160
00161 <font class="comment">// just append this freed element to the list.</font>
00162 *(<font class="keywordtype">void</font>**)ptr= <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>;
00163 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>= (<font class="keywordtype">void</font>*) ptr;
00164
00165 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>--;
00166 }
00167
00168
<a name="l00174"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a5">00174</a> <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CBlockMemory.html#a5">purge</a> ()
00175 {
00176 <font class="keywordflow">if</font>(NL3D_BlockMemoryAssertOnPurge)
00177 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>==0);
00178
00179 <font class="keywordflow">while</font>(<a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.begin()!=<a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.end())
00180 {
00181 <a class="code" href="classNLMISC_1_1CBlockMemory.html#c1">releaseBlock</a>(*<a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.begin());
00182 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.erase(<a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.begin());
00183 }
00184
00185 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>= NULL;
00186 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>= 0;
00187 }
00188
00189
00190 <font class="comment">// ********************</font>
00191 <font class="keyword">public</font>:
00192
00193 <font class="comment">// This is to be used with CSTLBlockAllocator only!!! It change the size of an element!!</font>
<a name="l00194"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a6">00194</a> <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CBlockMemory.html#a6">__stl_alloc_changeEltSize</a>(uint eltSize)
00195 {
00196 <font class="comment">// must not be used with object ctor/dtor behavior.</font>
00197 <a class="code" href="debug_8h.html#a6">nlassert</a>(__ctor_dtor__ == <font class="keyword">false</font>);
00198 <font class="comment">// format size.</font>
00199 eltSize= std::max(eltSize, <font class="keyword">sizeof</font>(<font class="keywordtype">void</font>*));
00200 <font class="comment">// if not the same size as before</font>
00201 <font class="keywordflow">if</font>(<a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>!= eltSize)
00202 {
00203 <font class="comment">// verify that rebind is made before any allocation!!</font>
00204 <a class="code" href="debug_8h.html#a6">nlassert</a>(<a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>.empty());
00205 <font class="comment">// change the size.</font>
00206 <a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>= eltSize;
00207 }
00208 };
00209 <font class="comment">// This is to be used with CSTLBlockAllocator only!!!</font>
<a name="l00210"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#a7">00210</a> uint <a class="code" href="classNLMISC_1_1CBlockMemory.html#a7">__stl_alloc_getEltSize</a>()<font class="keyword"> const</font>
00211 <font class="keyword"> </font>{
00212 <font class="keywordflow">return</font> <a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>;
00213 }
00214
00215
00216 <font class="keyword">private</font>:
<a name="l00218"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#o0">00218</a> uint <a class="code" href="classNLMISC_1_1CBlockMemory.html#o0">_BlockSize</a>;
<a name="l00220"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">00220</a> uint <a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>;
<a name="l00222"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">00222</a> sint <a class="code" href="classNLMISC_1_1CBlockMemory.html#o2">_NAllocatedElts</a>;
<a name="l00224"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">00224</a> <font class="keywordtype">void</font> *<a class="code" href="classNLMISC_1_1CBlockMemory.html#o3">_NextFreeElt</a>;
00225
00226
<a name="l00228"></a><a class="code" href="structNLMISC_1_1CBlockMemory_1_1CBlock.html">00228</a> <font class="keyword">struct </font>CBlock
00229 {
<a name="l00231"></a><a class="code" href="structNLMISC_1_1CBlockMemory_1_1CBlock.html#m0">00231</a> <font class="keywordtype">void</font> *<a class="code" href="structNLMISC_1_1CBlockMemory_1_1CBlock.html#m0">Data</a>;
00232 };
00233
<a name="l00235"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">00235</a> <a class="code" href="classstd_1_1list.html">std::list<CBlock></a> <a class="code" href="classNLMISC_1_1CBlockMemory.html#o4">_Blocks</a>;
00236
00237
<a name="l00239"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#u2">00239</a> <font class="keyword">enum</font> <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2">TCheckIdent</a> { <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u0">CheckAllocatedIdent</a>= 0x01234567, <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u1">CheckDeletedIdent</a>= 0x89ABCDEF };
00240
00241
00242 <font class="keyword">private</font>:
<a name="l00243"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#c0">00243</a> <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CBlockMemory.html#c0">buildBlock</a>(CBlock &block)
00244 {
00245 uint i;
00246 uint32 nodeSize= <a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>;
00247 <font class="preprocessor">#ifdef NL_DEBUG</font>
00248 <font class="preprocessor"></font> <font class="comment">// must allocate more size for mem checks in debug.</font>
00249 nodeSize+= 2*<font class="keyword">sizeof</font>(uint32);
00250 <font class="preprocessor">#endif</font>
00251 <font class="preprocessor"></font>
00252 <font class="comment">// allocate.</font>
00253 block.Data = (<font class="keywordtype">void</font>*)<font class="keyword">new</font> uint8 [<a class="code" href="classNLMISC_1_1CBlockMemory.html#o0">_BlockSize</a> * nodeSize];
00254
00255 <font class="comment">// by default, all elements are not allocated, build the list of free elements.</font>
00256 <font class="keywordtype">void</font> *ptr= block.Data;
00257 <font class="preprocessor">#ifdef NL_DEBUG</font>
00258 <font class="preprocessor"></font> <font class="comment">// if debug, must decal for begin check.</font>
00259 ptr= (uint32*)ptr + 1;
00260 <font class="preprocessor">#endif</font>
00261 <font class="preprocessor"></font> <font class="keywordflow">for</font>(i=0; i<<a class="code" href="classNLMISC_1_1CBlockMemory.html#o0">_BlockSize</a>-1; i++)
00262 {
00263 <font class="comment">// next elt.</font>
00264 <font class="keywordtype">void</font> *next= (uint8*)ptr + nodeSize;
00265 <font class="comment">// points to the next element in this array.</font>
00266 *(<font class="keywordtype">void</font>**)ptr= next;
00267 <font class="comment">// next.</font>
00268 ptr= next;
00269 }
00270 <font class="comment">// last element points to NULL.</font>
00271 *(<font class="keywordtype">void</font>**)ptr= NULL;
00272
00273
00274 <font class="comment">// If debug, must init all check values to CheckDeletedIdent.</font>
00275 <font class="preprocessor">#ifdef NL_DEBUG</font>
00276 <font class="preprocessor"></font> ptr= block.Data;
00277 <font class="comment">// must decal for begin check.</font>
00278 ptr= (uint32*)ptr + 1;
00279 <font class="comment">// fill all nodes.</font>
00280 <font class="keywordflow">for</font>(i=0; i<<a class="code" href="classNLMISC_1_1CBlockMemory.html#o0">_BlockSize</a>; i++)
00281 {
00282 uint32 *checkStart= (uint32*)ptr-1;
00283 uint32 *checkEnd = (uint32*)((uint8*)ptr+<a class="code" href="classNLMISC_1_1CBlockMemory.html#o1">_EltSize</a>);
00284 <font class="comment">// mark this element as deleted.</font>
00285 *checkStart= <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u1">CheckDeletedIdent</a>;
00286 *checkEnd = <a class="code" href="classNLMISC_1_1CBlockMemory.html#u2u1">CheckDeletedIdent</a>;
00287
00288 <font class="comment">// next elt.</font>
00289 ptr= (uint8*)ptr + nodeSize;
00290 }
00291 <font class="preprocessor">#endif</font>
00292 <font class="preprocessor"></font>
00293 }
<a name="l00294"></a><a class="code" href="classNLMISC_1_1CBlockMemory.html#c1">00294</a> <font class="keywordtype">void</font> <a class="code" href="classNLMISC_1_1CBlockMemory.html#c1">releaseBlock</a>(CBlock &block)
00295 {
00296 <font class="keyword">delete</font> [] ((uint8*)block.Data);
00297 }
00298
00299 };
00300
00301
00302 } <font class="comment">// NLMISC</font>
00303
00304
00305 <font class="preprocessor">#endif // NL_BLOCK_MEMORY_H</font>
00306 <font class="preprocessor"></font>
00307 <font class="comment">/* End of block_memory.h */</font>
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