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 
allocationCanFail()36         bool allocationCanFail() const { return m_allocationCanFail; }
setAllocationCanFail(bool c)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:
MemoryAllocationCanFail()62         MemoryAllocationCanFail() : m_old(memoryManager()->allocationCanFail()) { memoryManager()->setAllocationCanFail(true); }
~MemoryAllocationCanFail()63         ~MemoryAllocationCanFail() { memoryManager()->setAllocationCanFail(m_old); }
64     private:
65         bool m_old;
66     };
67 
68     class MemoryAllocationCannotFail {
69     public:
MemoryAllocationCannotFail()70         MemoryAllocationCannotFail() : m_old(memoryManager()->allocationCanFail()) { memoryManager()->setAllocationCanFail(false); }
~MemoryAllocationCannotFail()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;
81