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authorneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
committerneodarz <neodarz@neodarz.net>2018-08-11 20:21:34 +0200
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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>&lt;<font class="keyword">class</font> T&gt;
+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&amp; reference;
+00081 <font class="keyword">typedef</font> <font class="keyword">const</font> T&amp; 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> &amp;<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> &amp;<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 &amp;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-&gt;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&lt;T, false&gt; *bm) : _BlockMemory(bm)
+00112 {
+00113 }
+00115 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(<font class="keyword">const</font> CSTLBlockAllocator&lt;T&gt; &amp;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-&gt;__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-&gt;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-&gt;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> &lt;<font class="keyword">class</font> _Tp, <font class="keyword">class</font> U&gt;
+00161 CSTLBlockAllocator&lt;U&gt;&amp; __stl_alloc_rebind(CSTLBlockAllocator&lt;_Tp&gt;&amp; __a, <font class="keyword">const</font> U*)
+00162 {
+00163 <font class="comment">// must change the internal eltSize of __a.</font>
+00164 __a._BlockMemory-&gt;__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&lt;U&gt;&amp;)(__a);
+00167 }
+00168
+00169 <font class="keyword">template</font> &lt;<font class="keyword">class</font> _Tp, <font class="keyword">class</font> U&gt;
+00170 CSTLBlockAllocator&lt;U&gt; __stl_alloc_create(<font class="keyword">const</font> CSTLBlockAllocator&lt;_Tp&gt;&amp;, <font class="keyword">const</font> U*)
+00171 {
+00172 <font class="keywordflow">return</font> CSTLBlockAllocator&lt;U&gt;();
+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&lt;T, false&gt; *_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>&lt;<font class="keyword">class</font> T&gt;
+<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&lt; T &gt;
+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&lt;T, false&gt; *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&lt;T&gt; &amp;other) : std::allocator&lt;T&gt;(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&lt;T, false&gt; *bm)
+00217 {
+00218 }
+00220 <a class="code" href="classNLMISC_1_1CSTLBlockAllocator.html#a0">CSTLBlockAllocator</a>(<font class="keyword">const</font> CSTLBlockAllocator&lt;T&gt; &amp;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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