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<div class="title">CReferencedMemBlock.h</div> </div>
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<a href="_c_referenced_mem_block_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* +---------------------------------------------------------------------------+</span>
<a name="l00002"></a>00002 <span class="comment"> | The Mobile Robot Programming Toolkit (MRPT) C++ library |</span>
<a name="l00003"></a>00003 <span class="comment"> | |</span>
<a name="l00004"></a>00004 <span class="comment"> | http://www.mrpt.org/ |</span>
<a name="l00005"></a>00005 <span class="comment"> | |</span>
<a name="l00006"></a>00006 <span class="comment"> | Copyright (C) 2005-2011 University of Malaga |</span>
<a name="l00007"></a>00007 <span class="comment"> | |</span>
<a name="l00008"></a>00008 <span class="comment"> | This software was written by the Machine Perception and Intelligent |</span>
<a name="l00009"></a>00009 <span class="comment"> | Robotics Lab, University of Malaga (Spain). |</span>
<a name="l00010"></a>00010 <span class="comment"> | Contact: Jose-Luis Blanco <jlblanco@ctima.uma.es> |</span>
<a name="l00011"></a>00011 <span class="comment"> | |</span>
<a name="l00012"></a>00012 <span class="comment"> | This file is part of the MRPT project. |</span>
<a name="l00013"></a>00013 <span class="comment"> | |</span>
<a name="l00014"></a>00014 <span class="comment"> | MRPT is free software: you can redistribute it and/or modify |</span>
<a name="l00015"></a>00015 <span class="comment"> | it under the terms of the GNU General Public License as published by |</span>
<a name="l00016"></a>00016 <span class="comment"> | the Free Software Foundation, either version 3 of the License, or |</span>
<a name="l00017"></a>00017 <span class="comment"> | (at your option) any later version. |</span>
<a name="l00018"></a>00018 <span class="comment"> | |</span>
<a name="l00019"></a>00019 <span class="comment"> | MRPT is distributed in the hope that it will be useful, |</span>
<a name="l00020"></a>00020 <span class="comment"> | but WITHOUT ANY WARRANTY; without even the implied warranty of |</span>
<a name="l00021"></a>00021 <span class="comment"> | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |</span>
<a name="l00022"></a>00022 <span class="comment"> | GNU General Public License for more details. |</span>
<a name="l00023"></a>00023 <span class="comment"> | |</span>
<a name="l00024"></a>00024 <span class="comment"> | You should have received a copy of the GNU General Public License |</span>
<a name="l00025"></a>00025 <span class="comment"> | along with MRPT. If not, see <http://www.gnu.org/licenses/>. |</span>
<a name="l00026"></a>00026 <span class="comment"> | |</span>
<a name="l00027"></a>00027 <span class="comment"> +---------------------------------------------------------------------------+ */</span>
<a name="l00028"></a>00028 <span class="preprocessor">#ifndef CReferencedMemBlock_H</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define CReferencedMemBlock_H</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="utils__defs_8h.html">mrpt/utils/utils_defs.h</a>></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <utility></span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">namespace </span>mrpt
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036 <span class="keyword">namespace </span>utils
<a name="l00037"></a>00037 {<span class="comment"></span>
<a name="l00038"></a>00038 <span class="comment"> /** Represents a memory block (via "void*") that can be shared between several objects through copy operator (=).</span>
<a name="l00039"></a>00039 <span class="comment"> * It keeps the reference count and only when it comes to zero, the memory block is really freed.</span>
<a name="l00040"></a>00040 <span class="comment"> * \ingroup mrpt_base_grp</span>
<a name="l00041"></a>00041 <span class="comment"> */</span>
<a name="l00042"></a>00042 <span class="keyword">class </span><a class="code" href="base_2include_2mrpt_2base_2link__pragmas_8h.html#a6045fa0129b1a3d6c8bf895470e66574">BASE_IMPEXP</a> CReferencedMemBlock : <span class="keyword">public</span> stlplus::smart_ptr< vector_byte >
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keyword">public</span>:<span class="comment"></span>
<a name="l00045"></a>00045 <span class="comment"> /** Constructor with an optional size of the memory block */</span>
<a name="l00046"></a>00046 CReferencedMemBlock(<span class="keywordtype">size_t</span> mem_block_size = 0 );
<a name="l00047"></a>00047 <span class="comment"></span>
<a name="l00048"></a>00048 <span class="comment"> /** Destructor, calls dereference_once. */</span>
<a name="l00049"></a>00049 <span class="keyword">virtual</span> ~CReferencedMemBlock();
<a name="l00050"></a>00050 <span class="comment"></span>
<a name="l00051"></a>00051 <span class="comment"> /** Resize the shared memory block. */</span>
<a name="l00052"></a>00052 <span class="keywordtype">void</span> resize(<span class="keywordtype">size_t</span> mem_block_size );
<a name="l00053"></a>00053
<a name="l00054"></a><a class="code" href="classmrpt_1_1utils_1_1_c_referenced_mem_block.html#a4cc8832fb6c4db9a43119c60a23172ff">00054</a> <span class="keyword">template</span> <<span class="keyword">class</span> T> T <a class="code" href="namespacemrpt_1_1utils.html#ab0d63216ed1169b8456c0291d7dfcfc8" title="Utility to get a cast'ed pointer from a smart pointer.">getAs</a>()
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="keywordflow">if</span> (!<a class="code" href="classstlplus_1_1smart__ptr.html">stlplus::smart_ptr< vector_byte >::present</a>())
<a name="l00057"></a>00057 <a class="code" href="mrpt__macros_8h.html#aaa3f404ea85a6575a7139f8d101370ba">THROW_EXCEPTION</a>(<span class="stringliteral">"Trying to access to an uninitialized memory block"</span>);
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordflow">if</span>( <a class="code" href="classstlplus_1_1smart__ptr.html">stlplus::smart_ptr< vector_byte >::operator</a> ->()-><a class="code" href="eigen__plugins_8h.html#a05ed04d61c4f7d75d93908c25a09d8c4">empty</a>() )
<a name="l00060"></a>00060 <a class="code" href="mrpt__macros_8h.html#aaa3f404ea85a6575a7139f8d101370ba">THROW_EXCEPTION</a>(<span class="stringliteral">"Trying to access to a memory block of size 0"</span>);
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="keywordflow">return</span> <span class="keyword">reinterpret_cast<</span>T<span class="keyword">></span>( & <a class="code" href="classstlplus_1_1smart__ptr.html">stlplus::smart_ptr< vector_byte >::operator -></a>()->operator [](0) );
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064
<a name="l00065"></a><a class="code" href="classmrpt_1_1utils_1_1_c_referenced_mem_block.html#a1a6414ed61b52dc1dfeff71a7c89a816">00065</a> <span class="keyword">template</span> <<span class="keyword">class</span> T> T <a class="code" href="namespacemrpt_1_1utils.html#ab0d63216ed1169b8456c0291d7dfcfc8" title="Utility to get a cast'ed pointer from a smart pointer.">getAs</a>()<span class="keyword"> const</span>
<a name="l00066"></a>00066 <span class="keyword"> </span>{
<a name="l00067"></a>00067 <span class="keywordflow">if</span> (!<a class="code" href="classstlplus_1_1smart__ptr.html">stlplus::smart_ptr< vector_byte >::present</a>())
<a name="l00068"></a>00068 <a class="code" href="mrpt__macros_8h.html#aaa3f404ea85a6575a7139f8d101370ba">THROW_EXCEPTION</a>(<span class="stringliteral">"Trying to access to an uninitialized memory block"</span>);
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="keywordflow">if</span>( <a class="code" href="classstlplus_1_1smart__ptr.html">stlplus::smart_ptr< vector_byte >::operator</a> ->()-><a class="code" href="eigen__plugins_8h.html#a05ed04d61c4f7d75d93908c25a09d8c4">empty</a>() )
<a name="l00071"></a>00071 <a class="code" href="mrpt__macros_8h.html#aaa3f404ea85a6575a7139f8d101370ba">THROW_EXCEPTION</a>(<span class="stringliteral">"Trying to access to a memory block of size 0"</span>);
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="keywordflow">return</span> <span class="keyword">reinterpret_cast<</span><span class="keyword">const </span>T<span class="keyword">></span>( & <a class="code" href="classstlplus_1_1smart__ptr.html">stlplus::smart_ptr< vector_byte >::operator -></a>()->operator [](0) );
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075
<a name="l00076"></a>00076 }; <span class="comment">// End of class</span>
<a name="l00077"></a>00077
<a name="l00078"></a>00078 } <span class="comment">// End of namespace</span>
<a name="l00079"></a>00079 } <span class="comment">// End of namespace</span>
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="preprocessor">#endif</span>
</pre></div></div>
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