wtf/wince/MemoryManager.h

   1 /*
   2  * Copyright (C) 2008-2009 Torch Mobile Inc.
   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 #pragma once
  21
  22 #include <winbase.h>
  23
  24 typedef struct HBITMAP__* HBITMAP;
  25 typedef struct HDC__* HDC;
  26 typedef void *HANDLE;
  27 typedef struct tagBITMAPINFO BITMAPINFO;
  28
  29 namespace WTF {
  30
  31     class MemoryManager {
  32     public:
  33         MemoryManager();
  34         ~MemoryManager();
  35
  36         bool allocationCanFail() const { return m_allocationCanFail; }
  37         void setAllocationCanFail(bool c) { m_allocationCanFail = c; }
  38
  39         static HBITMAP createCompatibleBitmap(HDC hdc, int width, int height);
  40         static HBITMAP createDIBSection(const BITMAPINFO* pbmi, void** ppvBits);
  41         static void* m_malloc(size_t size);
  42         static void* m_calloc(size_t num, size_t size);
  43         static void* m_realloc(void* p, size_t size);
  44         static void m_free(void*);
  45         static bool resizeMemory(void* p, size_t newSize);
  46         static void* allocate64kBlock();
  47         static void free64kBlock(void*);
  48         static bool onIdle(DWORD& timeLimitMs);
  49         static LPVOID virtualAlloc(LPVOID lpAddress, DWORD dwSize, DWORD flAllocationType, DWORD flProtect);
  50         static BOOL virtualFree(LPVOID lpAddress, DWORD dwSize, DWORD dwFreeType);
  51
  52     private:
  53         friend MemoryManager* memoryManager();
  54
  55         bool m_allocationCanFail;
  56     };
  57
  58     MemoryManager* memoryManager();
  59
  60     class MemoryAllocationCanFail {
  61     public:
  62         MemoryAllocationCanFail() : m_old(memoryManager()->allocationCanFail()) { memoryManager()->setAllocationCanFail(true); }
  63         ~MemoryAllocationCanFail() { memoryManager()->setAllocationCanFail(m_old); }
  64     private:
  65         bool m_old;
  66     };
  67
  68     class MemoryAllocationCannotFail {
  69     public:
  70         MemoryAllocationCannotFail() : m_old(memoryManager()->allocationCanFail()) { memoryManager()->setAllocationCanFail(false); }
  71         ~MemoryAllocationCannotFail() { memoryManager()->setAllocationCanFail(m_old); }
  72     private:
  73         bool m_old;
  74     };
  75 }
  76
  77 using WTF::MemoryManager;
  78 using WTF::memoryManager;
  79 using WTF::MemoryAllocationCanFail;
  80 using WTF::MemoryAllocationCannotFail;