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87 lines
2.8 KiB
87 lines
2.8 KiB
14 years ago
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/*==LICENSE==*
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CyanWorlds.com Engine - MMOG client, server and tools
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Copyright (C) 2011 Cyan Worlds, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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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, see <http://www.gnu.org/licenses/>.
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You can contact Cyan Worlds, Inc. by email legal@cyan.com
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or by snail mail at:
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Cyan Worlds, Inc.
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14617 N Newport Hwy
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Mead, WA 99021
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*==LICENSE==*/
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/*****************************************************************************
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*
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* $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/pnUtArray.cpp
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*
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***/
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#include "../Pch.h"
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#pragma hdrstop
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/****************************************************************************
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*
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* CBaseArray
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*
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***/
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//===========================================================================
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unsigned CBaseArray::CalcAllocGrowth (unsigned newAlloc, unsigned oldAlloc, unsigned * chunkSize) {
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// If this is the initial allocation, or if the new allocation is more
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// than twice as big as the old allocation and larger than the chunk
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// size, then allocate exactly the amount of memory requested
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if (!oldAlloc || (newAlloc >= max(2 * oldAlloc, *chunkSize)))
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return newAlloc;
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// Otherwise, allocate memory beyond what was requested in preparation
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// for future requests, so that we can reduce the time spent performing
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// memory management
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// For small allocations, double the size of the buffer each time
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if (newAlloc < *chunkSize)
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return max(newAlloc, 2 * oldAlloc);
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// For larger allocations, grow by the chunk size each time
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if (oldAlloc + *chunkSize > newAlloc) {
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// If the application appears to be growing the array a chunk size
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// at a time and has allocated at least 16 chunks, double the chunk
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// size
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if (newAlloc >= 16 * *chunkSize)
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*chunkSize *= 2;
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return oldAlloc + *chunkSize;
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}
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unsigned remainder = newAlloc % *chunkSize;
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if (remainder)
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return newAlloc + *chunkSize - remainder;
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else
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return newAlloc;
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}
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//===========================================================================
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void * CBaseArray::ReallocPtr (void * ptr, unsigned bytes) {
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ref(ptr);
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void * newPtr = nil;
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if (bytes) {
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newPtr = ALLOCFLAGS(bytes, ARR_MEMORY_FLAGS);
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}
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return newPtr;
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}
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