diff options
author | Joshua Leung <aligorith@gmail.com> | 2010-06-17 06:42:43 +0400 |
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committer | Joshua Leung <aligorith@gmail.com> | 2010-06-17 06:42:43 +0400 |
commit | ed59822857de7e7b41b33b79c306f5e9b8755c62 (patch) | |
tree | aa15011ba1df16a98d023acf2a276b265bd3ceda /extern/bullet2/LinearMath/btStackAlloc.h | |
parent | 22bca493b23904c4dee7130f5737005f8558a26d (diff) |
== SoC Bullet - Bullet Upgrade to 2.76 ==
Updated Blender's Bullet to 2.76 in this branch only.
This update was done by:
1) deleting the contents of the existing extern/bullet2/src directory (leaving the .svn folder in place),
2) copy/pasting the contents of the bullet/src directory (from unzipped Bullet archive) into this newly cleared folder.
Hopefully there aren't any patches that are still needed from the Bullet we had in source.
---
Note: I didn't use Moguri's patch, since that was giving me compile errors with headers not being able to be found.
[[Split portion of a mixed commit.]]
Diffstat (limited to 'extern/bullet2/LinearMath/btStackAlloc.h')
-rw-r--r-- | extern/bullet2/LinearMath/btStackAlloc.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/extern/bullet2/LinearMath/btStackAlloc.h b/extern/bullet2/LinearMath/btStackAlloc.h new file mode 100644 index 00000000000..397b084877f --- /dev/null +++ b/extern/bullet2/LinearMath/btStackAlloc.h @@ -0,0 +1,116 @@ +/* +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 |