63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
/*
|
|
* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event will the authors be held liable for any damages
|
|
* arising from the use of this software.
|
|
* Permission is granted to anyone to use this software for any purpose,
|
|
* including commercial applications, and to alter it and redistribute it
|
|
* freely, subject to the following restrictions:
|
|
* 1. The origin of this software must not be misrepresented; you must not
|
|
* claim that you wrote the original software. If you use this software
|
|
* in a product, an acknowledgment in the product documentation would be
|
|
* appreciated but is not required.
|
|
* 2. Altered source versions must be plainly marked as such, and must not be
|
|
* misrepresented as being the original software.
|
|
* 3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
#ifndef B2_BLOCK_ALLOCATOR_H
|
|
#define B2_BLOCK_ALLOCATOR_H
|
|
|
|
#include "b2Settings.h"
|
|
|
|
const juce::int32 b2_chunkSize = 16 * 1024;
|
|
const juce::int32 b2_maxBlockSize = 640;
|
|
const juce::int32 b2_blockSizes = 14;
|
|
const juce::int32 b2_chunkArrayIncrement = 128;
|
|
|
|
struct b2Block;
|
|
struct b2Chunk;
|
|
|
|
/// This is a small object allocator used for allocating small
|
|
/// objects that persist for more than one time step.
|
|
/// See: http://www.codeproject.com/useritems/Small_Block_Allocator.asp
|
|
class b2BlockAllocator
|
|
{
|
|
public:
|
|
b2BlockAllocator();
|
|
~b2BlockAllocator();
|
|
|
|
/// Allocate memory. This will use b2Alloc if the size is larger than b2_maxBlockSize.
|
|
void* Allocate(juce::int32 size);
|
|
|
|
/// Free memory. This will use b2Free if the size is larger than b2_maxBlockSize.
|
|
void Free(void* p, juce::int32 size);
|
|
|
|
void Clear();
|
|
|
|
private:
|
|
|
|
b2Chunk* m_chunks;
|
|
juce::int32 m_chunkCount;
|
|
juce::int32 m_chunkSpace;
|
|
|
|
b2Block* m_freeLists[b2_blockSizes];
|
|
|
|
static juce::int32 s_blockSizes[b2_blockSizes];
|
|
static juce::uint8 s_blockSizeLookup[b2_maxBlockSize + 1];
|
|
static bool s_blockSizeLookupInitialized;
|
|
};
|
|
|
|
#endif
|