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85 lines
1.4 KiB
C++
85 lines
1.4 KiB
C++
//
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// MemoryPool.cpp
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//
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// $Id: //poco/1.4/Foundation/src/MemoryPool.cpp#1 $
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//
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// Library: Foundation
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// Package: Core
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// Module: MemoryPool
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//
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// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#include "Poco/MemoryPool.h"
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#include "Poco/Exception.h"
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namespace Poco {
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MemoryPool::MemoryPool(std::size_t blockSize, int preAlloc, int maxAlloc):
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_blockSize(blockSize),
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_maxAlloc(maxAlloc),
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_allocated(preAlloc)
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{
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poco_assert (maxAlloc == 0 || maxAlloc >= preAlloc);
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poco_assert (preAlloc >= 0 && maxAlloc >= 0);
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int r = BLOCK_RESERVE;
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if (preAlloc > r)
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r = preAlloc;
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if (maxAlloc > 0 && maxAlloc < r)
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r = maxAlloc;
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_blocks.reserve(r);
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for (int i = 0; i < preAlloc; ++i)
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{
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_blocks.push_back(new char[_blockSize]);
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}
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}
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MemoryPool::~MemoryPool()
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{
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for (BlockVec::iterator it = _blocks.begin(); it != _blocks.end(); ++it)
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{
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delete [] *it;
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}
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}
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void* MemoryPool::get()
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{
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FastMutex::ScopedLock lock(_mutex);
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if (_blocks.empty())
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{
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if (_maxAlloc == 0 || _allocated < _maxAlloc)
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{
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++_allocated;
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return new char[_blockSize];
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}
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else throw OutOfMemoryException("MemoryPool exhausted");
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}
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else
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{
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char* ptr = _blocks.back();
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_blocks.pop_back();
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return ptr;
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}
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}
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void MemoryPool::release(void* ptr)
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{
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FastMutex::ScopedLock lock(_mutex);
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_blocks.push_back(reinterpret_cast<char*>(ptr));
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}
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} // namespace Poco
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