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39
40#ifndef QT3DCORE_QFRAMEALLOCATOR_P_P_H
41#define QT3DCORE_QFRAMEALLOCATOR_P_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of other Qt classes. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <Qt3DCore/qt3dcore_global.h>
55
56QT_BEGIN_NAMESPACE
57
58namespace Qt3DCore {
59
60class QFrameAllocator;
61
62struct Q_AUTOTEST_EXPORT QFrameChunk
63{
64 void init(uint blockSize, uchar blocks);
65 void *allocate(uint blockSize);
66
67 void deallocate(void *p, uint blockSize);
68 bool contains(void *p, uint blockSize);
69 void clear(uint blockSize, uchar blocks);
70 void release();
71
72 inline bool isEmpty() const { return m_blocksAvailable == m_maxBlocksAvailable; }
73
74 uchar *m_data;
75 uchar m_firstAvailableBlock;
76 uchar m_blocksAvailable;
77 uchar m_maxBlocksAvailable;
78};
79
80class Q_AUTOTEST_EXPORT QFixedFrameAllocator
81{
82public:
83 QFixedFrameAllocator();
84 ~QFixedFrameAllocator();
85
86 void init(uint blockSize, uchar pageSize = 128);
87 void *allocate();
88 void deallocate(void *ptr);
89 void trim();
90 void release();
91 void clear();
92 bool isEmpty() const;
93
94 inline int chunkCount() const { return m_chunks.size(); }
95 inline uchar pageSize() const { return m_nbrBlock; }
96 inline uint blockSize() const { return m_blockSize; }
97
98private:
99 QFrameChunk &scan();
100
101private:
102 uint m_blockSize;
103 uchar m_nbrBlock;
104 QVector<QFrameChunk> m_chunks;
105 QFrameChunk *m_lastAllocatedChunck;
106 QFrameChunk *m_lastFreedChunck;
107};
108
109class QFrameAllocatorPrivate
110{
111public:
112 QFrameAllocatorPrivate();
113
114 inline void *allocateAtChunk(uint allocatorIndex)
115 {
116 return m_allocatorPool[allocatorIndex].allocate();
117 }
118
119 inline void deallocateAtChunck(void *ptr, uint allocatorIndex)
120 {
121 m_allocatorPool[allocatorIndex].deallocate(ptr);
122 }
123
124 inline uint allocatorIndexFromSize(uint targetSize) const
125 {
126 return (targetSize + m_alignment - 1) / m_alignment - 1;
127 }
128
129 uint m_maxObjectSize;
130 uint m_alignment;
131 QVector<QFixedFrameAllocator> m_allocatorPool;
132};
133
134} // Qt3D
135
136QT_END_NAMESPACE
137
138#endif // QT3DCORE_QFRAMEALLOCATOR_P_P_H
139

source code of qt3d/src/core/resources/qframeallocator_p_p.h