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Wanne
be95a2a7b1
git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@4447 3b4a5df2-a311-0410-b5c6-a8a6f20db521
95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
/*
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* bfVFS : vfs/Tools/vfs_allocator.h
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* - allocator class to reserve memory blockwise for a larger amount of objects (that have constant size)
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*
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* Copyright (C) 2008 - 2010 (BF) john.bf.smith@googlemail.com
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*
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* This file is part of the bfVFS library
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _VFS_ALLOCATOR_H_
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#define _VFS_ALLOCATOR_H_
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#include <vfs/vfs_config.h>
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#include <vector>
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namespace vfs
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{
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// needs to be destructible
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class VFS_API IAllocator
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{
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public:
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virtual ~IAllocator() {};
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};
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template<typename T>
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class VFS_API ObjBlockAllocator : public IAllocator
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{
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public:
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ObjBlockAllocator(unsigned int blockSize=1024)
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: IAllocator(), BLOCK_SIZE(blockSize), _ObjNew(0) {};
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const unsigned int BLOCK_SIZE;
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///
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T* New(unsigned int *ID = NULL)
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{
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unsigned int block_id = _ObjNew/BLOCK_SIZE;
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unsigned int file_id = _ObjNew % BLOCK_SIZE;
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if(block_id >= _ObjPool.size())
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{
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tBlock* b = new tBlock();
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b->resize(BLOCK_SIZE);
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_ObjPool.push_back(b);
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}
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tBlock* block = _ObjPool[block_id];
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T* obj = &(*block)[file_id];
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if(ID)
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{
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*ID = _ObjNew;
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}
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_ObjNew++;
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return obj;
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}
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///
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virtual ~ObjBlockAllocator()
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{
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for(unsigned int i = 0; i < _ObjPool.size(); ++i)
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{
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delete _ObjPool[i];
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}
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}
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private:
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void operator=(ObjBlockAllocator<T> const& t);
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typedef std::vector<T> tBlock;
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std::vector<tBlock*> _ObjPool;
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unsigned int _ObjNew;
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};
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class VFS_API ObjectAllocator
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{
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public:
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static void registerAllocator(IAllocator* allocator);
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static void clear();
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private:
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static std::vector<IAllocator*> _valloc;
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};
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} // namespace vfs
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#endif // _VFS_ALLOCATOR_H_
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