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-rw-r--r--thirdparty/bullet/src/LinearMath/btStackAlloc.h116
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diff --git a/thirdparty/bullet/src/LinearMath/btStackAlloc.h b/thirdparty/bullet/src/LinearMath/btStackAlloc.h
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--- a/thirdparty/bullet/src/LinearMath/btStackAlloc.h
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-/*
-Copyright (c) 2003-2006 Gino van den Bergen / Erwin Coumans http://continuousphysics.com/Bullet/
-
-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.
-*/
-
-/*
-StackAlloc extracted from GJK-EPA collision solver by Nathanael Presson
-Nov.2006
-*/
-
-#ifndef BT_STACK_ALLOC
-#define BT_STACK_ALLOC
-
-#include "btScalar.h" //for btAssert
-#include "btAlignedAllocator.h"
-
-///The btBlock class is an internal structure for the btStackAlloc memory allocator.
-struct btBlock
-{
- btBlock* previous;
- unsigned char* address;
-};
-
-///The StackAlloc class provides some fast stack-based memory allocator (LIFO last-in first-out)
-class btStackAlloc
-{
-public:
-
- btStackAlloc(unsigned int size) { ctor();create(size); }
- ~btStackAlloc() { destroy(); }
-
- inline void create(unsigned int size)
- {
- destroy();
- data = (unsigned char*) btAlignedAlloc(size,16);
- totalsize = size;
- }
- inline void destroy()
- {
- btAssert(usedsize==0);
- //Raise(L"StackAlloc is still in use");
-
- if(usedsize==0)
- {
- if(!ischild && data)
- btAlignedFree(data);
-
- data = 0;
- usedsize = 0;
- }
-
- }
-
- int getAvailableMemory() const
- {
- return static_cast<int>(totalsize - usedsize);
- }
-
- unsigned char* allocate(unsigned int size)
- {
- const unsigned int nus(usedsize+size);
- if(nus<totalsize)
- {
- usedsize=nus;
- return(data+(usedsize-size));
- }
- btAssert(0);
- //&& (L"Not enough memory"));
-
- return(0);
- }
- SIMD_FORCE_INLINE btBlock* beginBlock()
- {
- btBlock* pb = (btBlock*)allocate(sizeof(btBlock));
- pb->previous = current;
- pb->address = data+usedsize;
- current = pb;
- return(pb);
- }
- SIMD_FORCE_INLINE void endBlock(btBlock* block)
- {
- btAssert(block==current);
- //Raise(L"Unmatched blocks");
- if(block==current)
- {
- current = block->previous;
- usedsize = (unsigned int)((block->address-data)-sizeof(btBlock));
- }
- }
-
-private:
- void ctor()
- {
- data = 0;
- totalsize = 0;
- usedsize = 0;
- current = 0;
- ischild = false;
- }
- unsigned char* data;
- unsigned int totalsize;
- unsigned int usedsize;
- btBlock* current;
- bool ischild;
-};
-
-#endif //BT_STACK_ALLOC