Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
134 lines
4.3 KiB
C++
134 lines
4.3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtDeclarative module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the 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 The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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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 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QDECLARATIVEJSMEMORYPOOL_P_H
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#define QDECLARATIVEJSMEMORYPOOL_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "qdeclarativejsglobal_p.h"
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#include <QtCore/qglobal.h>
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#include <QtCore/qshareddata.h>
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#include <string.h>
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QT_QML_BEGIN_NAMESPACE
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namespace QDeclarativeJS {
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class QML_PARSER_EXPORT MemoryPool : public QSharedData
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{
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public:
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enum { maxBlockCount = -1 };
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enum { defaultBlockSize = 1 << 12 };
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MemoryPool() {
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m_blockIndex = maxBlockCount;
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m_currentIndex = 0;
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m_storage = 0;
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m_currentBlock = 0;
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m_currentBlockSize = 0;
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}
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virtual ~MemoryPool() {
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for (int index = 0; index < m_blockIndex + 1; ++index)
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qFree(m_storage[index]);
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qFree(m_storage);
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}
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char *allocate(int bytes) {
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bytes += (8 - bytes) & 7; // ensure multiple of 8 bytes (maintain alignment)
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if (m_currentBlock == 0 || m_currentBlockSize < m_currentIndex + bytes) {
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++m_blockIndex;
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m_currentBlockSize = defaultBlockSize << m_blockIndex;
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m_storage = reinterpret_cast<char**>(qRealloc(m_storage, sizeof(char*) * (1 + m_blockIndex)));
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m_currentBlock = m_storage[m_blockIndex] = reinterpret_cast<char*>(qMalloc(m_currentBlockSize));
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::memset(m_currentBlock, 0, m_currentBlockSize);
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m_currentIndex = (8 - quintptr(m_currentBlock)) & 7; // ensure first chunk is 64-bit aligned
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Q_ASSERT(m_currentIndex + bytes <= m_currentBlockSize);
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}
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char *p = reinterpret_cast<char *>
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(m_currentBlock + m_currentIndex);
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m_currentIndex += bytes;
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return p;
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}
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int bytesAllocated() const {
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int bytes = 0;
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for (int index = 0; index < m_blockIndex; ++index)
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bytes += (defaultBlockSize << index);
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bytes += m_currentIndex;
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return bytes;
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}
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private:
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int m_blockIndex;
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int m_currentIndex;
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char *m_currentBlock;
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int m_currentBlockSize;
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char **m_storage;
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private:
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Q_DISABLE_COPY(MemoryPool)
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};
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} // namespace QDeclarativeJS
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QT_QML_END_NAMESPACE
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#endif
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