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author | con <qtc-commiter@nokia.com> | 2008-12-02 12:01:29 +0100 |
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committer | con <qtc-commiter@nokia.com> | 2008-12-02 12:01:29 +0100 |
commit | 05c35356abc31549c5db6eba31fb608c0365c2a0 (patch) | |
tree | be044530104267afaff13f8943889cb97f8c8bad /shared/cplusplus/MemoryPool.cpp | |
download | qt-creator-05c35356abc31549c5db6eba31fb608c0365c2a0.tar.gz |
Initial import
Diffstat (limited to 'shared/cplusplus/MemoryPool.cpp')
-rw-r--r-- | shared/cplusplus/MemoryPool.cpp | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/shared/cplusplus/MemoryPool.cpp b/shared/cplusplus/MemoryPool.cpp new file mode 100644 index 0000000000..6d6876f6f0 --- /dev/null +++ b/shared/cplusplus/MemoryPool.cpp @@ -0,0 +1,115 @@ +/*************************************************************************** +** +** This file is part of Qt Creator +** +** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). +** +** Contact: Qt Software Information (qt-info@nokia.com) +** +** +** Non-Open Source Usage +** +** Licensees may use this file in accordance with the Qt Beta Version +** License Agreement, Agreement version 2.2 provided with the Software or, +** alternatively, in accordance with the terms contained in a written +** agreement between you and Nokia. +** +** GNU General Public License Usage +** +** Alternatively, this file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the packaging +** of this file. Please review the following information to ensure GNU +** General Public Licensing requirements will be met: +** +** http://www.fsf.org/licensing/licenses/info/GPLv2.html and +** http://www.gnu.org/copyleft/gpl.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt GPL Exception version +** 1.2, included in the file GPL_EXCEPTION.txt in this package. +** +***************************************************************************/ +// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com> +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +#include "MemoryPool.h" +#include <cstdlib> +#include <cstring> +#include <cassert> + +CPLUSPLUS_BEGIN_NAMESPACE + +MemoryPool::MemoryPool() + : _initializeAllocatedMemory(true), + _blocks(0), + _allocatedBlocks(0), + _blockCount(-1), + ptr(0), + end(0) +{ } + +MemoryPool::~MemoryPool() +{ + if (_blockCount != -1) { + for (int i = 0; i < _blockCount + 1; ++i) { + free(_blocks[i]); + } + } + + if (_blocks) + free(_blocks); +} + +bool MemoryPool::initializeAllocatedMemory() const +{ return _initializeAllocatedMemory; } + +void MemoryPool::setInitializeAllocatedMemory(bool initializeAllocatedMemory) +{ _initializeAllocatedMemory = initializeAllocatedMemory; } + +void *MemoryPool::allocate_helper(size_t size) +{ + assert(size < BLOCK_SIZE); + + if (++_blockCount == _allocatedBlocks) { + if (! _allocatedBlocks) + _allocatedBlocks = 8; + else + _allocatedBlocks *= 2; + + _blocks = (char **) realloc(_blocks, sizeof(char *) * _allocatedBlocks); + } + + char *&block = _blocks[_blockCount]; + + if (_initializeAllocatedMemory) + block = (char *) calloc(1, BLOCK_SIZE); + else + block = (char *) malloc(BLOCK_SIZE); + + ptr = block; + end = ptr + BLOCK_SIZE; + + void *addr = ptr; + ptr += size; + return addr; +} + +CPLUSPLUS_END_NAMESPACE |