61 lines
1.7 KiB
C
61 lines
1.7 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_STACK_ALLOCATOR_H
|
||
|
|
#define B2_STACK_ALLOCATOR_H
|
||
|
|
|
||
|
|
#include "b2Settings.h"
|
||
|
|
|
||
|
|
const juce::int32 b2_stackSize = 100 * 1024; // 100k
|
||
|
|
const juce::int32 b2_maxStackEntries = 32;
|
||
|
|
|
||
|
|
struct b2StackEntry
|
||
|
|
{
|
||
|
|
char* data;
|
||
|
|
juce::int32 size;
|
||
|
|
bool usedMalloc;
|
||
|
|
};
|
||
|
|
|
||
|
|
// This is a stack allocator used for fast per step allocations.
|
||
|
|
// You must nest allocate/free pairs. The code will assert
|
||
|
|
// if you try to interleave multiple allocate/free pairs.
|
||
|
|
class b2StackAllocator
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
b2StackAllocator();
|
||
|
|
~b2StackAllocator();
|
||
|
|
|
||
|
|
void* Allocate(juce::int32 size);
|
||
|
|
void Free(void* p);
|
||
|
|
|
||
|
|
juce::int32 GetMaxAllocation() const;
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
char m_data[b2_stackSize];
|
||
|
|
juce::int32 m_index;
|
||
|
|
|
||
|
|
juce::int32 m_allocation;
|
||
|
|
juce::int32 m_maxAllocation;
|
||
|
|
|
||
|
|
b2StackEntry m_entries[b2_maxStackEntries];
|
||
|
|
juce::int32 m_entryCount;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|