00001 /* +---------------------------------------------------------------------------+ 00002 | The Mobile Robot Programming Toolkit (MRPT) C++ library | 00003 | | 00004 | http://mrpt.sourceforge.net/ | 00005 | | 00006 | Copyright (C) 2005-2009 University of Malaga | 00007 | | 00008 | This software was written by the Machine Perception and Intelligent | 00009 | Robotics Lab, University of Malaga (Spain). | 00010 | Contact: Jose-Luis Blanco <jlblanco@ctima.uma.es> | 00011 | | 00012 | This file is part of the MRPT project. | 00013 | | 00014 | MRPT is free software: you can redistribute it and/or modify | 00015 | it under the terms of the GNU General Public License as published by | 00016 | the Free Software Foundation, either version 3 of the License, or | 00017 | (at your option) any later version. | 00018 | | 00019 | MRPT is distributed in the hope that it will be useful, | 00020 | but WITHOUT ANY WARRANTY; without even the implied warranty of | 00021 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 00022 | GNU General Public License for more details. | 00023 | | 00024 | You should have received a copy of the GNU General Public License | 00025 | along with MRPT. If not, see <http://www.gnu.org/licenses/>. | 00026 | | 00027 +---------------------------------------------------------------------------+ */ 00028 #ifndef CReferencedMemBlock_H 00029 #define CReferencedMemBlock_H 00030 00031 #include <mrpt/utils/utils_defs.h> 00032 #include <utility> 00033 00034 namespace mrpt 00035 { 00036 namespace utils 00037 { 00038 /** Represents a memory block (via "void*") that can be shared between several objects through copy operator (=). 00039 * It keeps the reference count and only when it comes to zero, the memory block is really freed. 00040 */ 00041 class MRPTDLLIMPEXP CReferencedMemBlock : public stlplus::smart_ptr< vector_byte > 00042 { 00043 public: 00044 /** Constructor with an optional size of the memory block */ 00045 CReferencedMemBlock(size_t mem_block_size = 0 ); 00046 00047 /** Destructor, calls dereference_once. */ 00048 virtual ~CReferencedMemBlock(); 00049 00050 /** Resize the shared memory block. */ 00051 void resize(size_t mem_block_size ); 00052 00053 template <class T> T getAs() 00054 { 00055 MRPT_TRY_START 00056 if (!stlplus::smart_ptr< vector_byte >::present()) 00057 THROW_EXCEPTION("Trying to access to an uninitialized memory block"); 00058 00059 if( stlplus::smart_ptr< vector_byte >::operator ->()->empty() ) 00060 THROW_EXCEPTION("Trying to access to a memory block of size 0"); 00061 00062 return reinterpret_cast<T>( & stlplus::smart_ptr< vector_byte >::operator ->()->operator [](0) ); 00063 MRPT_TRY_END 00064 } 00065 00066 template <class T> T getAs() const 00067 { 00068 MRPT_TRY_START 00069 if (!stlplus::smart_ptr< vector_byte >::present()) 00070 THROW_EXCEPTION("Trying to access to an uninitialized memory block"); 00071 00072 if( stlplus::smart_ptr< vector_byte >::operator ->()->empty() ) 00073 THROW_EXCEPTION("Trying to access to a memory block of size 0"); 00074 00075 return reinterpret_cast<const T>( & stlplus::smart_ptr< vector_byte >::operator ->()->operator [](0) ); 00076 MRPT_TRY_END 00077 } 00078 00079 }; // End of class 00080 00081 } // End of namespace 00082 } // End of namespace 00083 00084 #endif
Page generated by Doxygen 1.5.7.1 for MRPT 0.7.1 SVN: at Mon Aug 17 23:02:22 EDT 2009 |