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      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 #include "config.h"
     21 #include "MemoryManager.h"
     22 
     23 #undef malloc
     24 #undef calloc
     25 #undef realloc
     26 #undef free
     27 #undef strdup
     28 #undef _strdup
     29 #undef VirtualAlloc
     30 #undef VirtualFree
     31 
     32 #include <malloc.h>
     33 #include <windows.h>
     34 
     35 namespace WTF {
     36 
     37 MemoryManager* memoryManager()
     38 {
     39     static MemoryManager mm;
     40     return &mm;
     41 }
     42 
     43 MemoryManager::MemoryManager()
     44 : m_allocationCanFail(false)
     45 {
     46 }
     47 
     48 MemoryManager::~MemoryManager()
     49 {
     50 }
     51 
     52 HBITMAP MemoryManager::createCompatibleBitmap(HDC hdc, int width, int height)
     53 {
     54     return ::CreateCompatibleBitmap(hdc, width, height);
     55 }
     56 
     57 HBITMAP MemoryManager::createDIBSection(const BITMAPINFO* pbmi, void** ppvBits)
     58 {
     59     return ::CreateDIBSection(0, pbmi, DIB_RGB_COLORS, ppvBits, 0, 0);
     60 }
     61 
     62 void* MemoryManager::m_malloc(size_t size)
     63 {
     64     return malloc(size);
     65 }
     66 
     67 void* MemoryManager::m_calloc(size_t num, size_t size)
     68 {
     69     return calloc(num, size);
     70 }
     71 
     72 void* MemoryManager::m_realloc(void* p, size_t size)
     73 {
     74     return realloc(p, size);
     75 }
     76 
     77 void MemoryManager::m_free(void* p)
     78 {
     79     return free(p);
     80 }
     81 
     82 bool MemoryManager::resizeMemory(void*, size_t)
     83 {
     84     return false;
     85 }
     86 
     87 void* MemoryManager::allocate64kBlock()
     88 {
     89     return VirtualAlloc(0, 65536, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
     90 }
     91 
     92 void MemoryManager::free64kBlock(void* p)
     93 {
     94     VirtualFree(p, 65536, MEM_RELEASE);
     95 }
     96 
     97 bool MemoryManager::onIdle(DWORD& timeLimitMs)
     98 {
     99     return false;
    100 }
    101 
    102 LPVOID MemoryManager::virtualAlloc(LPVOID lpAddress, DWORD dwSize, DWORD flAllocationType, DWORD flProtect)
    103 {
    104     return ::VirtualAlloc(lpAddress, dwSize, flAllocationType, flProtect);
    105 }
    106 
    107 BOOL MemoryManager::virtualFree(LPVOID lpAddress, DWORD dwSize, DWORD dwFreeType)
    108 {
    109     return ::VirtualFree(lpAddress, dwSize, dwFreeType);
    110 }
    111 
    112 
    113 #if defined(USE_SYSTEM_MALLOC) && USE_SYSTEM_MALLOC
    114 
    115 void *fastMalloc(size_t n) { return malloc(n); }
    116 void *fastCalloc(size_t n_elements, size_t element_size) { return calloc(n_elements, element_size); }
    117 void fastFree(void* p) { return free(p); }
    118 void *fastRealloc(void* p, size_t n) { return realloc(p, n); }
    119 
    120 #else
    121 
    122 void *fastMalloc(size_t n) { return MemoryManager::m_malloc(n); }
    123 void *fastCalloc(size_t n_elements, size_t element_size) { return MemoryManager::m_calloc(n_elements, element_size); }
    124 void fastFree(void* p) { return MemoryManager::m_free(p); }
    125 void *fastRealloc(void* p, size_t n) { return MemoryManager::m_realloc(p, n); }
    126 
    127 #endif
    128 
    129 #ifndef NDEBUG
    130 void fastMallocForbid() {}
    131 void fastMallocAllow() {}
    132 #endif
    133 
    134 void* fastZeroedMalloc(size_t n)
    135 {
    136     void* p = fastMalloc(n);
    137     if (p)
    138         memset(p, 0, n);
    139     return p;
    140 }
    141 
    142 TryMallocReturnValue tryFastMalloc(size_t n)
    143 {
    144     MemoryAllocationCanFail canFail;
    145     return fastMalloc(n);
    146 }
    147 
    148 TryMallocReturnValue tryFastZeroedMalloc(size_t n)
    149 {
    150     MemoryAllocationCanFail canFail;
    151     return fastZeroedMalloc(n);
    152 }
    153 
    154 TryMallocReturnValue tryFastCalloc(size_t n_elements, size_t element_size)
    155 {
    156     MemoryAllocationCanFail canFail;
    157     return fastCalloc(n_elements, element_size);
    158 }
    159 
    160 TryMallocReturnValue tryFastRealloc(void* p, size_t n)
    161 {
    162     MemoryAllocationCanFail canFail;
    163     return fastRealloc(p, n);
    164 }
    165 
    166 char* fastStrDup(const char* str)
    167 {
    168     return _strdup(str);
    169 }
    170 
    171 }