third_party/WebKit/Source/wtf/FastAllocBase.h

   1 /*
   2  * Copyright (C) 2008, 2009 Paul Pedriana <ppedriana@ea.com>. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef FastAllocBase_h
  30 #define FastAllocBase_h
  31
  32 // Provides customizable overrides of fastMalloc/fastFree and operator new/delete
  33 //
  34 // Provided functionality:
  35 //    Macro: WTF_MAKE_FAST_ALLOCATED
  36 //
  37 // Example usage:
  38 //    class Widget {
  39 //        WTF_MAKE_FAST_ALLOCATED(Widget)
  40 //    ...
  41 //    };
  42 //
  43 //    struct Data {
  44 //        WTF_MAKE_FAST_ALLOCATED(Data)
  45 //    public:
  46 //    ...
  47 //    };
  48 //
  49
  50 #include "wtf/Assertions.h"
  51 #include "wtf/FastMalloc.h"
  52 #include "wtf/StdLibExtras.h"
  53
  54 #define WTF_MAKE_FAST_ALLOCATED(type) \
  55 public: \
  56     void* operator new(size_t, void* p) { return p; } \
  57     void* operator new[](size_t, void* p) { return p; } \
  58     \
  59     void* operator new(size_t size) \
  60     { \
  61         return ::WTF::fastMalloc(size); \
  62     } \
  63     \
  64     void operator delete(void* p) \
  65     { \
  66         ::WTF::fastFree(p); \
  67     } \
  68     \
  69     void* operator new[](size_t size) \
  70     { \
  71         return ::WTF::fastMalloc(size); \
  72     } \
  73     \
  74     void operator delete[](void* p) \
  75     { \
  76          ::WTF::fastFree(p); \
  77     } \
  78     void* operator new(size_t, NotNullTag, void* location) \
  79     { \
  80         ASSERT(location); \
  81         return location; \
  82     } \
  83     static const char* classNameForAllocator() \
  84     { \
  85         return #type; \
  86     } \
  87 private: \
  88 typedef int __thisIsHereToForceASemicolonAfterThisMacro
  89
  90 #endif // FastAllocBase_h