00001 /* 00002 ----------------------------------------------------------------------------- 00003 This source file is part of OGRE 00004 (Object-oriented Graphics Rendering Engine) 00005 For the latest info, see http://www.ogre3d.org/ 00006 00007 Copyright (c) 2000-2009 Torus Knot Software Ltd 00008 00009 Permission is hereby granted, free of charge, to any person obtaining a copy 00010 of this software and associated documentation files (the "Software"), to deal 00011 in the Software without restriction, including without limitation the rights 00012 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00013 copies of the Software, and to permit persons to whom the Software is 00014 furnished to do so, subject to the following conditions: 00015 00016 The above copyright notice and this permission notice shall be included in 00017 all copies or substantial portions of the Software. 00018 00019 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00020 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00021 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00022 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00023 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00024 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00025 THE SOFTWARE. 00026 ----------------------------------------------------------------------------- 00027 */ 00028 00029 #ifndef _MemorySTLAllocator_H__ 00030 #define _MemorySTLAllocator_H__ 00031 00032 #include "OgrePrerequisites.h" 00033 #include "OgreHeaderPrefix.h" 00034 00035 namespace Ogre 00036 { 00037 00038 00061 template 00062 < 00063 typename T, 00064 typename AllocPolicy 00065 > 00066 class STLAllocator 00067 { 00068 public : 00070 typedef T value_type; 00071 typedef value_type* pointer; 00072 typedef const value_type* const_pointer; 00073 typedef value_type& reference; 00074 typedef const value_type& const_reference; 00075 typedef std::size_t size_type; 00076 typedef std::ptrdiff_t difference_type; 00077 00078 00080 template<typename U> 00081 struct rebind 00082 { 00083 typedef STLAllocator<U, AllocPolicy> other; 00084 }; 00085 00087 inline explicit STLAllocator() 00088 { } 00089 00091 virtual ~STLAllocator() 00092 { } 00093 00095 inline STLAllocator( STLAllocator const& ) 00096 { } 00097 00099 template <typename U> 00100 inline STLAllocator( STLAllocator<U, AllocPolicy> const& ) 00101 { } 00102 00104 template <typename U, typename P> 00105 inline STLAllocator( STLAllocator<U, P> const& ) 00106 { } 00107 00109 inline pointer allocate( size_type count, 00110 typename std::allocator<void>::const_pointer ptr = 0 ) 00111 { 00112 (void)ptr; 00113 // convert request to bytes 00114 register size_type sz = count*sizeof( T ); 00115 pointer p = static_cast<pointer>(AllocPolicy::allocateBytes(sz)); 00116 return p; 00117 } 00118 00120 inline void deallocate( pointer ptr, size_type ) 00121 { 00122 // convert request to bytes, but we can't use this? 00123 // register size_type sz = count*sizeof( T ); 00124 AllocPolicy::deallocateBytes(ptr); 00125 } 00126 00127 pointer address(reference x) const 00128 { 00129 return &x; 00130 } 00131 00132 const_pointer address(const_reference x) const 00133 { 00134 return &x; 00135 } 00136 00137 size_type max_size() const throw() 00138 { 00139 // maximum size this can handle, delegate 00140 return AllocPolicy::getMaxAllocationSize(); 00141 } 00142 00143 void construct(pointer p, const T& val) 00144 { 00145 // call placement new 00146 new(static_cast<void*>(p)) T(val); 00147 } 00148 00149 void destroy(pointer p) 00150 { 00151 // do we have to protect against non-classes here? 00152 // some articles suggest yes, some no 00153 p->~T(); 00154 } 00155 00156 }; 00157 00160 template<typename T, typename T2, typename P> 00161 inline bool operator==(STLAllocator<T,P> const&, 00162 STLAllocator<T2,P> const&) 00163 { 00164 // same alloc policy (P), memory can be freed 00165 return true; 00166 } 00167 00170 template<typename T, typename P, typename OtherAllocator> 00171 inline bool operator==(STLAllocator<T,P> const&, 00172 OtherAllocator const&) 00173 { 00174 return false; 00175 } 00178 template<typename T, typename T2, typename P> 00179 inline bool operator!=(STLAllocator<T,P> const&, 00180 STLAllocator<T2,P> const&) 00181 { 00182 // same alloc policy (P), memory can be freed 00183 return false; 00184 } 00185 00188 template<typename T, typename P, typename OtherAllocator> 00189 inline bool operator!=(STLAllocator<T,P> const&, 00190 OtherAllocator const&) 00191 { 00192 return true; 00193 } 00194 00195 00199 }// namespace Ogre 00200 00201 #include "OgreHeaderSuffix.h" 00202 #endif // _MemorySTLAllocator_H__ 00203
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Last modified Thu Dec 31 16:27:11 2009