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| author | neodarz <neodarz@neodarz.net> | 2018-08-11 20:21:34 +0200 |
|---|---|---|
| committer | neodarz <neodarz@neodarz.net> | 2018-08-11 20:21:34 +0200 |
| commit | 0ea5fc66924303d1bf73ba283a383e2aadee02f2 (patch) | |
| tree | 2568e71a7ccc44ec23b8bb3f0ff97fb6bf2ed709 /docs/doxygen/nel/block__memory_8h-source.html | |
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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>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> +</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> |