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<hr><h1>stl_block_allocator.h</h1><a href="stl__block__allocator_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_STL_BLOCK_ALLOCATOR_H</font>
00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_STL_BLOCK_ALLOCATOR_H</font>
00028 <font class="preprocessor"></font>
00029
00030 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font>
00031 <font class="preprocessor">#include "<a class="code" href="block__memory_8h.html">nel/misc/block_memory.h</a>"</font>
00032
00033
00034 <font class="keyword">namespace </font>NLMISC {
00035
00036
00037 <font class="comment">// ***************************************************************************</font>
00067 <font class="comment"></font><font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00068 <font class="preprocessor"></font>
00069 <font class="keyword">template</font><<font class="keyword">class</font> T>
00070 <font class="keyword">class </font>CSTLBlockAllocator
00071 {
00072 <font class="keyword">public</font>:
00073
00075 <font class="comment">// @{</font>
00076
00077 <font class="keyword">typedef</font> T value_type;
00078 <font class="keyword">typedef</font> value_type *<a class="code" href="driver__opengl__extension__def_8h.html#a362">pointer</a>;
00079 <font class="keyword">typedef</font> <font class="keyword">const</font> T* const_pointer;
00080 <font class="keyword">typedef</font> T& reference;
00081 <font class="keyword">typedef</font> <font class="keyword">const</font> T& const_reference;
00082 <font class="keyword">typedef</font> size_t size_type;
00083 <font class="keyword">typedef</font> ptrdiff_t difference_type;
00084
00085
00086 <a class="code" href="driver__opengl__extension__def_8h.html#a362">pointer</a> adress(reference <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>)<font class="keyword"> const</font>
00087 <font class="keyword"> </font>{
00088 <font class="keywordflow">return</font> &<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>;
00089 }
00090
00091 const_pointer adress(const_reference <a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>)<font class="keyword"> const</font>
00092 <font class="keyword"> </font>{
00093 <font class="keywordflow">return</font> &<a class="code" href="driver__opengl__extension__def_8h.html#a364">x</a>;
00094 }
00095
00096 <font class="keywordtype">void</font> construct(<a class="code" href="driver__opengl__extension__def_8h.html#a362">pointer</a> p, <font class="keyword">const</font> T &val)
00097 {
00098 <font class="keyword">new</font> (p) T(val);
00099 }
00100
00101 <font class="keywordtype">void</font> destroy(<a class="code" href="driver__opengl__extension__def_8h.html#a362">pointer</a> p)
00102 {
00103 p->T::~T();
00104 }
00105
00106 <font class="comment">// @}</font>
00107
00108 <font class="keyword">public</font>:
00109
00111 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(CBlockMemory<T, false> *bm) : _BlockMemory(bm)
00112 {
00113 }
00115 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(<font class="keyword">const</font> CSTLBlockAllocator<T> &other) : _BlockMemory(other._BlockMemory)
00116 {
00117 <font class="comment">// just copy the block memory from the other allocator.</font>
00118 }
00120 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a2">~CSTLBlockAllocator</a>()
00121 {
00122 _BlockMemory= NULL;
00123 }
00124
00125
00126 <a class="code" href="driver__opengl__extension__def_8h.html#a362">pointer</a> allocate(size_type n, const_pointer hint= NULL)
00127 {
00128 <font class="keywordflow">if</font>(n==0)
00129 <font class="keywordflow">return</font> NULL;
00130 <font class="comment">// If sizeof 1, use CBlockMemory allocation</font>
00131 <font class="keywordflow">if</font>(n==1)
00132 {
00133 <font class="preprocessor">#ifdef NL_DEBUG</font>
00134 <font class="preprocessor"></font> <font class="comment">// verify that we allocate with good size!! (verify __stl_alloc_rebind scheme).</font>
00135 <font class="comment">// ie an allocator can be used only to allocate a kind of element</font>
00136 uint eltSize= std::max(<font class="keyword">sizeof</font>(T), <font class="keyword">sizeof</font>(<font class="keywordtype">void</font>*));
00137 <a class="code" href="debug_8h.html#a6">nlassert</a>( eltSize == _BlockMemory->__stl_alloc_getEltSize() );
00138 <font class="preprocessor">#endif</font>
00139 <font class="preprocessor"></font> <font class="comment">// and allocate.</font>
00140 <font class="keywordflow">return</font> _BlockMemory->allocate();
00141 }
00142 <font class="comment">// else use std malloc</font>
00143 <font class="keywordflow">else</font>
00144 <font class="keywordflow">return</font> (T*)<font class="keyword">new</font> uint8[n*<font class="keyword">sizeof</font>(T)];
00145 }
00146
00147 <font class="keywordtype">void</font> deallocate(<font class="keywordtype">void</font> *p, size_type n)
00148 {
00149 <font class="keywordflow">if</font>(n==0)
00150 <font class="keywordflow">return</font>;
00151 <font class="comment">// If sizeof 1, use CBlockMemory allocation</font>
00152 <font class="keywordflow">if</font>(n==1)
00153 _BlockMemory->free((T*)p);
00154 <font class="comment">// else use std free</font>
00155 <font class="keywordflow">else</font>
00156 <font class="keyword">delete</font> [] ((uint8*)p);
00157 }
00158
00159
00160 <font class="keyword">template</font> <<font class="keyword">class</font> _Tp, <font class="keyword">class</font> U>
00161 CSTLBlockAllocator<U>& __stl_alloc_rebind(CSTLBlockAllocator<_Tp>& __a, <font class="keyword">const</font> U*)
00162 {
00163 <font class="comment">// must change the internal eltSize of __a.</font>
00164 __a._BlockMemory->__stl_alloc_changeEltSize(<font class="keyword">sizeof</font>(U));
00165 <font class="comment">// and just typecast/return him</font>
00166 <font class="keywordflow">return</font> (CSTLBlockAllocator<U>&)(__a);
00167 }
00168
00169 <font class="keyword">template</font> <<font class="keyword">class</font> _Tp, <font class="keyword">class</font> U>
00170 CSTLBlockAllocator<U> __stl_alloc_create(<font class="keyword">const</font> CSTLBlockAllocator<_Tp>&, <font class="keyword">const</font> U*)
00171 {
00172 <font class="keywordflow">return</font> CSTLBlockAllocator<U>();
00173 }
00174
00175
00176
00177 <font class="comment">// *******************</font>
00178 <font class="keyword">private</font>:
00179
00180 <font class="comment">// The blockMemory used to allocate elements</font>
00181 CBlockMemory<T, false> *_BlockMemory;
00182
00183 };
00184
00185
00186 <font class="preprocessor">#else // NL_OS_WINDOWS</font>
00187 <font class="preprocessor"></font>
00189
00190 <font class="preprocessor"># if !defined (__STL_USE_SGI_ALLOCATORS)</font>
00191 <font class="preprocessor"></font><font class="keyword">template</font><<font class="keyword">class</font> T>
<a name="l00192"></a><a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html">00192</a> <font class="keyword">class </font>CSTLBlockAllocator : <font class="keyword">public</font> std::allocator< T >
00193 {
00194 <font class="keyword">public</font>:
00195
<a name="l00197"></a><a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">00197</a> <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(CBlockMemory<T, false> *bm)
00198 {
00199 }
<a name="l00201"></a><a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a1">00201</a> <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(<font class="keyword">const</font> CSTLBlockAllocator<T> &other) : std::allocator<T>(other)
00202 {
00203 }
<a name="l00205"></a><a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a2">00205</a> <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a2">~CSTLBlockAllocator</a>()
00206 {
00207 }
00208
00209 };
00210 <font class="preprocessor"># else // !defined (__STL_USE_SGI_ALLOCATORS)</font>
00211 <font class="preprocessor"></font><font class="keyword">class </font>CSTLBlockAllocator : <font class="keyword">public</font> __sgi_alloc
00212 {
00213 <font class="keyword">public</font>:
00214
00216 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(CBlockMemory<T, false> *bm)
00217 {
00218 }
00220 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(<font class="keyword">const</font> CSTLBlockAllocator<T> &other) : __sgi_alloc(other)
00221 {
00222 }
00224 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a2">~CSTLBlockAllocator</a>()
00225 {
00226 }
00227
00228 };
00229 <font class="preprocessor"># endif // !defined (__STL_USE_SGI_ALLOCATORS)</font>
00230 <font class="preprocessor"></font>
00231
00232 <font class="preprocessor">#endif // NL_OS_WINDOWS</font>
00233 <font class="preprocessor"></font>
00234
00235
00236 } <font class="comment">// NLMISC</font>
00237
00238
00239 <font class="preprocessor">#endif // NL_STL_BLOCK_ALLOCATOR_H</font>
00240 <font class="preprocessor"></font>
00241 <font class="comment">/* End of stl_block_allocator.h */</font>
</pre></div>
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