mirror of
https://github.com/s1lentq/ReGameDLL_CS.git
synced 2024-10-16 23:37:00 +03:00
124 lines
3.0 KiB
C++
124 lines
3.0 KiB
C++
/*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* In addition, as a special exception, the author gives permission to
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* link the code of this program with the Half-Life Game Engine ("HL
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* Engine") and Modified Game Libraries ("MODs") developed by Valve,
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* L.L.C ("Valve"). You must obey the GNU General Public License in all
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* respects for all of the code used other than the HL Engine and MODs
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* from Valve. If you modify this file, you may extend this exception
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* to your version of the file, but you are not obligated to do so. If
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* you do not wish to do so, delete this exception statement from your
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* version.
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*
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*/
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#include "precompiled.h"
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CMemoryPool::CMemoryPool(int blockSize, int numElements)
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{
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_blocksPerBlob = numElements;
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_blockSize = blockSize;
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_numBlobs = 0;
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_numElements = 0;
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AddNewBlob();
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_peakAlloc = 0;
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_blocksAllocated = 0;
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}
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CMemoryPool::~CMemoryPool()
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{
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for (int i = 0; i < _numBlobs; i++)
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free(_memBlob[i]);
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}
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void CMemoryPool::AddNewBlob()
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{
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int sizeMultiplier = pow(2.0, _numBlobs);
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int nElements = _blocksPerBlob * sizeMultiplier;
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int blobSize = _blockSize * nElements;
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_memBlob[_numBlobs] = malloc(blobSize);
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#ifdef _WIN32
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if (!_memBlob[_numBlobs])
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DebugBreak();
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#endif // _WIN32
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_headOfFreeList = _memBlob[_numBlobs];
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#ifdef _WIN32
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if (!_headOfFreeList)
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DebugBreak();
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#endif // _WIN32
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void **newBlob = (void **)_headOfFreeList;
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for (int j = 0; j < nElements - 1; j++)
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{
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newBlob[0] = (char *)newBlob + _blockSize;
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newBlob = (void **)newBlob[0];
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}
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newBlob[0] = nullptr;
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_numElements += nElements;
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_numBlobs++;
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#ifdef _WIN32
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if (_numBlobs >= MAX_BLOBS - 1)
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DebugBreak();
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#endif // _WIN32
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}
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void *CMemoryPool::Alloc(unsigned int amount)
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{
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void *returnBlock;
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if (amount > (unsigned int)_blockSize)
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return nullptr;
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_blocksAllocated++;
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_peakAlloc = Q_max(_peakAlloc, _blocksAllocated);
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if (_blocksAllocated >= _numElements)
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AddNewBlob();
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#ifdef _WIN32
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if (!_headOfFreeList)
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DebugBreak();
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#endif // _WIN32
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returnBlock = _headOfFreeList;
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_headOfFreeList = *((void **)_headOfFreeList);
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return returnBlock;
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}
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void CMemoryPool::Free(void *memblock)
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{
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if (!memblock)
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return;
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#ifdef _DEBUG
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Q_memset(memblock, 0xDD, _blockSize);
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#endif // _DEBUG
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--_blocksAllocated;
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*((void **)memblock) = _headOfFreeList;
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_headOfFreeList = memblock;
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}
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