intern/memutil/MEM_Allocator.h

   1 /**
   2  *
   3  * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version. The Blender
   9  * Foundation also sells licenses for use in proprietary software under
  10  * the Blender License.  See http://www.blender.org/BL/ for information
  11  * about this.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21  *
  22  * Contributor(s): Peter Schlaile <peter@schlaile.de> 2005
  23  *
  24  * ***** END GPL/BL DUAL LICENSE BLOCK *****
  25  */
  26
  27 #ifndef __MEM_Allocator_h_included__
  28 #define __MEM_Allocator_h_included__ 1
  29
  30 #include "guardedalloc/MEM_guardedalloc.h"
  31
  32 #ifdef _MSC_VER
  33 #if _MSC_VER < 1300 // 1200 == VC++ 6.0 according to boost
  34 #define MS_VISUALC_6_0_WORKAROUND 1
  35 #endif
  36 #endif
  37
  38 template<typename _Tp>
  39 struct MEM_Allocator
  40 {
  41         typedef size_t    size_type;
  42         typedef ptrdiff_t difference_type;
  43         typedef _Tp*       pointer;
  44         typedef const _Tp* const_pointer;
  45         typedef _Tp&       reference;
  46         typedef const _Tp& const_reference;
  47         typedef _Tp        value_type;
  48
  49 #ifndef MS_VISUALC_6_0_WORKAROUND
  50         template<typename _Tp1>
  51         struct rebind {
  52                 typedef MEM_Allocator<_Tp1> other;
  53         };
  54 #endif
  55
  56         MEM_Allocator() throw() {}
  57         MEM_Allocator(const MEM_Allocator&) throw() {}
  58
  59 #ifndef MS_VISUALC_6_0_WORKAROUND
  60         template<typename _Tp1>
  61         MEM_Allocator(const MEM_Allocator<_Tp1>) throw() { }
  62 #endif
  63
  64         ~MEM_Allocator() throw() {}
  65
  66         pointer address(reference __x) const { return &__x; }
  67
  68         const_pointer address(const_reference __x) const { return &__x; }
  69
  70 #ifdef MS_VISUALC_6_0_WORKAROUND
  71         char *_Charalloc(size_type n) {
  72                 return (char *) MEM_mallocN(n, "STL MEM_Allocator VC6.0");
  73         }
  74 #endif
  75         // NB: __n is permitted to be 0.  The C++ standard says nothing
  76         // about what the return value is when __n == 0.
  77         _Tp* allocate(size_type __n, const void* = 0) {
  78                 _Tp* __ret = 0;
  79                 if (__n)
  80                         __ret = static_cast<_Tp*>(
  81                                 MEM_mallocN(__n * sizeof(_Tp),
  82                                             "STL MEM_Allocator"));
  83                 return __ret;
  84         }
  85
  86 #ifndef MS_VISUALC_6_0_WORKAROUND
  87         // __p is not permitted to be a null pointer.
  88         void deallocate(pointer __p, size_type){
  89                 MEM_freeN(__p);
  90         }
  91 #else
  92         // __p is not permitted to be a null pointer.
  93         void deallocate(void* __p, size_type){
  94                 MEM_freeN(__p);
  95         }
  96 #endif
  97
  98         size_type max_size() const throw() {
  99                 return size_t(-1) / sizeof(_Tp);
 100         }
 101
 102         void construct(pointer __p, const _Tp& __val) {
 103                 new(__p) _Tp(__val);
 104         }
 105
 106         void destroy(pointer __p) {
 107                 __p->~_Tp();
 108         }
 109 };
 110
 111 #endif