forked from qt-creator/qt-creator
140 lines
4.0 KiB
C++
140 lines
4.0 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include "MemoryPool.h"
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#include <cstring>
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#include <cassert>
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using namespace CPlusPlus;
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MemoryPool::MemoryPool()
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: _blocks(0),
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_allocatedBlocks(0),
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_blockCount(-1),
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_ptr(0),
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_end(0)
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{ }
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MemoryPool::~MemoryPool()
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{
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if (_blocks) {
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for (int i = 0; i < _allocatedBlocks; ++i) {
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if (char *b = _blocks[i])
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std::free(b);
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}
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std::free(_blocks);
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}
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}
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void MemoryPool::reset()
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{
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_blockCount = -1;
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_ptr = _end = 0;
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}
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void *MemoryPool::allocate_helper(size_t size)
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{
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assert(size < BLOCK_SIZE);
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if (++_blockCount == _allocatedBlocks) {
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if (! _allocatedBlocks)
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_allocatedBlocks = DEFAULT_BLOCK_COUNT;
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else
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_allocatedBlocks *= 2;
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_blocks = (char **) realloc(_blocks, sizeof(char *) * _allocatedBlocks);
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for (int index = _blockCount; index < _allocatedBlocks; ++index)
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_blocks[index] = 0;
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}
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char *&block = _blocks[_blockCount];
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if (! block)
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block = (char *) std::malloc(BLOCK_SIZE);
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_ptr = block;
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_end = _ptr + BLOCK_SIZE;
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void *addr = _ptr;
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_ptr += size;
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return addr;
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}
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RecursiveMemoryPool::RecursiveMemoryPool(MemoryPool *pool)
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: _pool(pool),
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_blockCount(pool->_blockCount),
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_ptr(pool->_ptr),
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_end(pool->_end)
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{
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}
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RecursiveMemoryPool::~RecursiveMemoryPool()
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{
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_pool->_blockCount = _blockCount;
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_pool->_ptr = _ptr;
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_pool->_end = _end;
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}
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Managed::Managed()
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{ }
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Managed::~Managed()
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{ }
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void *Managed::operator new(size_t size, MemoryPool *pool)
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{ return pool->allocate(size); }
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void Managed::operator delete(void *)
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{ }
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void Managed::operator delete(void *, MemoryPool *)
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{ }
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