wtf/FastMalloc.h

   1 /*
   2  *  Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Library General Public License
  15  *  along with this library; see the file COPYING.LIB.  If not, write to
  16  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  *  Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #ifndef WTF_FastMalloc_h
  22 #define WTF_FastMalloc_h
  23
  24 #include "Platform.h"
  25 #include <stdlib.h>
  26 #include <new>
  27
  28 namespace WTF {
  29
  30     // These functions call CRASH() if an allocation fails.
  31     void* fastMalloc(size_t n);
  32     void* fastZeroedMalloc(size_t n);
  33     void* fastCalloc(size_t n_elements, size_t element_size);
  34     void* fastRealloc(void* p, size_t n);
  35
  36     // These functions return NULL if an allocation fails.
  37     void* tryFastMalloc(size_t n);
  38     void* tryFastZeroedMalloc(size_t n);
  39     void* tryFastCalloc(size_t n_elements, size_t element_size);
  40     void* tryFastRealloc(void* p, size_t n);
  41
  42     void fastFree(void* p);
  43
  44 #ifndef NDEBUG
  45     void fastMallocForbid();
  46     void fastMallocAllow();
  47 #endif
  48
  49     void releaseFastMallocFreeMemory();
  50
  51     struct FastMallocStatistics {
  52         size_t heapSize;
  53         size_t freeSizeInHeap;
  54         size_t freeSizeInCaches;
  55         size_t returnedSize;
  56     };
  57     FastMallocStatistics fastMallocStatistics();
  58
  59 } // namespace WTF
  60
  61 using WTF::fastMalloc;
  62 using WTF::fastZeroedMalloc;
  63 using WTF::fastCalloc;
  64 using WTF::fastRealloc;
  65 using WTF::tryFastMalloc;
  66 using WTF::tryFastZeroedMalloc;
  67 using WTF::tryFastCalloc;
  68 using WTF::tryFastRealloc;
  69 using WTF::fastFree;
  70
  71 #ifndef NDEBUG
  72 using WTF::fastMallocForbid;
  73 using WTF::fastMallocAllow;
  74 #endif
  75
  76 #if COMPILER(GCC) && PLATFORM(DARWIN)
  77 #define WTF_PRIVATE_INLINE __private_extern__ inline __attribute__((always_inline))
  78 #elif COMPILER(GCC)
  79 #define WTF_PRIVATE_INLINE inline __attribute__((always_inline))
  80 #elif COMPILER(MSVC)
  81 #define WTF_PRIVATE_INLINE __forceinline
  82 #else
  83 #define WTF_PRIVATE_INLINE inline
  84 #endif
  85
  86 #ifndef _CRTDBG_MAP_ALLOC
  87
  88 #if !defined(USE_SYSTEM_MALLOC) || !(USE_SYSTEM_MALLOC)
  89 WTF_PRIVATE_INLINE void* operator new(size_t s) { return fastMalloc(s); }
  90 WTF_PRIVATE_INLINE void operator delete(void* p) { fastFree(p); }
  91 WTF_PRIVATE_INLINE void* operator new[](size_t s) { return fastMalloc(s); }
  92 WTF_PRIVATE_INLINE void operator delete[](void* p) { fastFree(p); }
  93 #endif
  94
  95 #endif // _CRTDBG_MAP_ALLOC
  96
  97 #endif /* WTF_FastMalloc_h */