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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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