Box2D: b2BlockAllocator.h Source File

Box2D 2.3.0 A 2D Physics Engine for Games

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b2BlockAllocator.h
1 /*
2 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 * Permission is granted to anyone to use this software for any purpose,
8 * including commercial applications, and to alter it and redistribute it
9 * freely, subject to the following restrictions:
10 * 1. The origin of this software must not be misrepresented; you must not
11 * claim that you wrote the original software. If you use this software
12 * in a product, an acknowledgment in the product documentation would be
13 * appreciated but is not required.
14 * 2. Altered source versions must be plainly marked as such, and must not be
15 * misrepresented as being the original software.
16 * 3. This notice may not be removed or altered from any source distribution.
17 */
18
19 #ifndef B2_BLOCK_ALLOCATOR_H
20 #define B2_BLOCK_ALLOCATOR_H
21
22 #include <Box2D/Common/b2Settings.h>
23
24 const int32 b2_chunkSize = 16 * 1024;
25 const int32 b2_maxBlockSize = 640;
26 const int32 b2_blockSizes = 14;
27 const int32 b2_chunkArrayIncrement = 128;
28
29 struct b2Block;
30 struct b2Chunk;
31
35 class b2BlockAllocator
36 {
37 public:
38 b2BlockAllocator();
39 ~b2BlockAllocator();
40
42 void* Allocate(int32 size);
43
45 void Free(void* p, int32 size);
46
47 void Clear();
48
49 private:
50
51 b2Chunk* m_chunks;
52 int32 m_chunkCount;
53 int32 m_chunkSpace;
54
55 b2Block* m_freeLists[b2_blockSizes];
56
57 static int32 s_blockSizes[b2_blockSizes];
58 static uint8 s_blockSizeLookup[b2_maxBlockSize + 1];
59 static bool s_blockSizeLookupInitialized;
60 };
61
62 #endif
b2BlockAllocator::Free
void Free(void *p, int32 size)
Free memory. This will use b2Free if the size is larger than b2_maxBlockSize.
Definition: b2BlockAllocator.cpp:155
b2Chunk
Definition: b2BlockAllocator.cpp:44
b2BlockAllocator
Definition: b2BlockAllocator.h:35
b2Block
Definition: b2BlockAllocator.cpp:50
b2Settings.h
b2BlockAllocator::Allocate
void * Allocate(int32 size)
Allocate memory. This will use b2Alloc if the size is larger than b2_maxBlockSize.
Definition: b2BlockAllocator.cpp:97