132 lines
4.2 KiB
C++
132 lines
4.2 KiB
C++
//
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// The developer of the original code and/or files is Tripwire, Inc.
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// Portions created by Tripwire, Inc. are copyright (C) 2000 Tripwire,
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// Inc. Tripwire is a registered trademark of Tripwire, Inc. All rights
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// reserved.
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//
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// This program is free software. The contents of this file are subject
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// to 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 your
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// option) any later version. You may redistribute it and/or modify it
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// only in compliance with the GNU General Public License.
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//
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// This program is distributed in the hope that it will be useful.
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// However, this program is distributed AS-IS WITHOUT ANY
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// WARRANTY; INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS
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// FOR A PARTICULAR PURPOSE. Please see the GNU General Public License
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// 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
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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//
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// Nothing in the GNU General Public License or any other license to use
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// the code or files shall permit you to use Tripwire's trademarks,
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// service marks, or other intellectual property without Tripwire's
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// prior written consent.
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//
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// If you have any questions, please contact Tripwire, Inc. at either
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// info@tripwire.org or www.tripwire.org.
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//
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// objectpool.cpp
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#include "stdcore.h"
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#include "objectpool.h"
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#include "debug.h"
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//-----------------------------------------------------------------------------
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// cBlockLink
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//-----------------------------------------------------------------------------
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class cBlockLink
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{
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public:
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cBlockLink(cBlockLink* pNext) : mpNext(pNext) {}
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cBlockLink* Next() { return mpNext; }
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private:
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cBlockLink* mpNext; // pointer to the next link, or NULL
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};
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//-----------------------------------------------------------------------------
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// cBlockList
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//-----------------------------------------------------------------------------
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///////////////////////////////////////////////////////////////////////////////
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// ctor, dtor
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///////////////////////////////////////////////////////////////////////////////
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cBlockList::cBlockList() :
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mpBlocks(0)
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{
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}
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cBlockList::~cBlockList()
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{
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Clear();
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}
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///////////////////////////////////////////////////////////////////////////////
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// Allocate
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///////////////////////////////////////////////////////////////////////////////
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void* cBlockList::Allocate(int size)
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{
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char* mem = new char[size + sizeof(cBlockLink)];
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mpBlocks = new(mem) cBlockLink(mpBlocks);
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return mem + sizeof(cBlockLink);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Clear
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///////////////////////////////////////////////////////////////////////////////
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void cBlockList::Clear()
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{
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while(mpBlocks)
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{
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cBlockLink* pLink = mpBlocks;
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mpBlocks = mpBlocks->Next();
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pLink->~cBlockLink();
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delete [] (char*)(pLink);
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}
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}
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//-----------------------------------------------------------------------------
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// cObjectPoolBase
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//-----------------------------------------------------------------------------
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///////////////////////////////////////////////////////////////////////////////
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// ctor, dtor
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///////////////////////////////////////////////////////////////////////////////
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cObjectPoolBase::cObjectPoolBase(int objSize, int chunkSize) :
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mObjectSize(objSize),
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mChunkSize(chunkSize),
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mpNextFree(0)
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{
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}
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cObjectPoolBase::~cObjectPoolBase()
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{
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//TODO -- assert that the number of instances left are 0.
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Clear();
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}
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///////////////////////////////////////////////////////////////////////////////
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// AllocNewChunk
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///////////////////////////////////////////////////////////////////////////////
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void cObjectPoolBase::AllocNewChunk()
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{
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ASSERT(mpNextFree == 0);
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int size = mObjectSize * mChunkSize;
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char* pBlock = (char*)mBlockList.Allocate(size);
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char* pLast = pBlock + size - mObjectSize;
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for(char* pc = pBlock; pc < pLast; pc += mObjectSize)
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{
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((cLink*)pc)->mpNext = (cLink*)(pc + mObjectSize);
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}
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((cLink*)pLast)->mpNext = 0;
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mpNextFree = (cLink*)pBlock;
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}
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