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Diffstat (limited to 'sc4pd/headers/lang/AdvancingAllocPool.h')
-rwxr-xr-x | sc4pd/headers/lang/AdvancingAllocPool.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/sc4pd/headers/lang/AdvancingAllocPool.h b/sc4pd/headers/lang/AdvancingAllocPool.h new file mode 100755 index 0000000..b89d69b --- /dev/null +++ b/sc4pd/headers/lang/AdvancingAllocPool.h @@ -0,0 +1,82 @@ +/* + SuperCollider real time audio synthesis system + Copyright (c) 2002 James McCartney. All rights reserved. + http://www.audiosynth.com + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ +/* + +AdvancingAllocPool implements a simple advancing pointer allocation scheme. +There is no Free(). All objects in the pool are freed at once with FreeAll(). +Thus it is very fast. + +*/ + +#ifndef _AdvancingAllocPool_ +#define _AdvancingAllocPool_ + +#include <stdexcept> +#include <stdlib.h> + +class AllocPool; + +struct AdvancingAllocPoolChunk; + +typedef int int32; + +inline void FailNil(void *ptr) { + if (!ptr) throw std::runtime_error("alloc failed"); +} + +struct AdvancingAllocPoolChunkHdr { + AdvancingAllocPoolChunk *mNext; + size_t mSize; + int32 mPad1, mPad2; +}; + +struct AdvancingAllocPoolChunk { + AdvancingAllocPoolChunk *mNext; + size_t mSize; + int32 mPad1, mPad2; + char mSpace[16]; +}; + +class AdvancingAllocPool +{ +public: + AdvancingAllocPool(); + ~AdvancingAllocPool() { FreeAll(); } + + void Init(AllocPool *inAllocPool, size_t initSize, size_t growSize, size_t tooBigSize); + + void *Alloc(size_t inBytes); + void FreeAll(); + + bool SanityCheck(); + +private: + void AddChunk(size_t inSize); + + AllocPool* mAllocPool; + size_t mInitSize; + size_t mGrowSize; + size_t mCurSize; + size_t mTooBig; + AdvancingAllocPoolChunk *mChunks; + AdvancingAllocPoolChunk *mFatties; +}; + +#endif |