b2BlockAllocator.h
Go to the documentation of this file.
00001 /*
00002 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
00003 *
00004 * This software is provided 'as-is', without any express or implied
00005 * warranty.  In no event will the authors be held liable for any damages
00006 * arising from the use of this software.
00007 * Permission is granted to anyone to use this software for any purpose,
00008 * including commercial applications, and to alter it and redistribute it
00009 * freely, subject to the following restrictions:
00010 * 1. The origin of this software must not be misrepresented; you must not
00011 * claim that you wrote the original software. If you use this software
00012 * in a product, an acknowledgment in the product documentation would be
00013 * appreciated but is not required.
00014 * 2. Altered source versions must be plainly marked as such, and must not be
00015 * misrepresented as being the original software.
00016 * 3. This notice may not be removed or altered from any source distribution.
00017 */
00018 
00019 #ifndef B2_BLOCK_ALLOCATOR_H
00020 #define B2_BLOCK_ALLOCATOR_H
00021 
00022 #include <Box2D/Common/b2Settings.h>
00023 
00024 const int32 b2_chunkSize = 16 * 1024;
00025 const int32 b2_maxBlockSize = 640;
00026 const int32 b2_blockSizes = 14;
00027 const int32 b2_chunkArrayIncrement = 128;
00028 
00029 struct b2Block;
00030 struct b2Chunk;
00031 
00035 class b2BlockAllocator
00036 {
00037 public:
00038         b2BlockAllocator();
00039         ~b2BlockAllocator();
00040 
00042         void* Allocate(int32 size);
00043 
00045         void Free(void* p, int32 size);
00046 
00047         void Clear();
00048 
00049 private:
00050 
00051         b2Chunk* m_chunks;
00052         int32 m_chunkCount;
00053         int32 m_chunkSpace;
00054 
00055         b2Block* m_freeLists[b2_blockSizes];
00056 
00057         static int32 s_blockSizes[b2_blockSizes];
00058         static uint8 s_blockSizeLookup[b2_maxBlockSize + 1];
00059         static bool s_blockSizeLookupInitialized;
00060 };
00061 
00062 #endif


mvsim
Author(s):
autogenerated on Thu Jun 6 2019 22:08:34