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Diffstat (limited to 'src/core/resources/qframeallocator_p_p.h')
-rw-r--r-- | src/core/resources/qframeallocator_p_p.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/core/resources/qframeallocator_p_p.h b/src/core/resources/qframeallocator_p_p.h new file mode 100644 index 000000000..bf4e0a2b1 --- /dev/null +++ b/src/core/resources/qframeallocator_p_p.h @@ -0,0 +1,138 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB). +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the Qt3D module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QT3DCORE_QFRAMEALLOCATOR_P_P_H +#define QT3DCORE_QFRAMEALLOCATOR_P_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists for the convenience +// of other Qt classes. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <Qt3DCore/qt3dcore_global.h> + +QT_BEGIN_NAMESPACE + +namespace Qt3DCore { + +class QFrameAllocator; + +struct Q_AUTOTEST_EXPORT QFrameChunk +{ + void init(uint blockSize, uchar blocks); + void *allocate(uint blockSize); + + void deallocate(void *p, uint blockSize); + bool contains(void *p, uint blockSize); + void clear(uint blockSize, uchar blocks); + void release(); + + inline bool isEmpty() const { return m_blocksAvailable == m_maxBlocksAvailable; } + + uchar *m_data; + uchar m_firstAvailableBlock; + uchar m_blocksAvailable; + uchar m_maxBlocksAvailable; +}; + +class Q_AUTOTEST_EXPORT QFixedFrameAllocator +{ +public: + QFixedFrameAllocator(); + ~QFixedFrameAllocator(); + + void init(uint blockSize, uchar pageSize = 128); + void *allocate(); + void deallocate(void *ptr); + void trim(); + void release(); + void clear(); + bool isEmpty() const; + + inline int chunkCount() const { return m_chunks.size(); } + inline uchar pageSize() const { return m_nbrBlock; } + inline uint blockSize() const { return m_blockSize; } + +private: + QFrameChunk &scan(); + +private: + uint m_blockSize; + uchar m_nbrBlock; + QVector<QFrameChunk> m_chunks; + QFrameChunk *m_lastAllocatedChunck; + QFrameChunk *m_lastFreedChunck; +}; + +class QFrameAllocatorPrivate +{ +public: + QFrameAllocatorPrivate(); + + inline void *allocateAtChunk(uint allocatorIndex) + { + return m_allocatorPool[allocatorIndex].allocate(); + } + + inline void deallocateAtChunck(void *ptr, uint allocatorIndex) + { + m_allocatorPool[allocatorIndex].deallocate(ptr); + } + + inline uint allocatorIndexFromSize(uint targetSize) const + { + return (targetSize + m_alignment - 1) / m_alignment - 1; + } + + uint m_maxObjectSize; + uint m_alignment; + QVector<QFixedFrameAllocator> m_allocatorPool; +}; + +} // Qt3D + +QT_END_NAMESPACE + +#endif // QT3DCORE_QFRAMEALLOCATOR_P_P_H |