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6 ** This file is part of the QtDeclarative module of the Qt Toolkit.
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21 ** GNU General Public License Usage
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40 ****************************************************************************/
42 #ifndef QDECLARATIVEJSMEMORYPOOL_P_H
43 #define QDECLARATIVEJSMEMORYPOOL_P_H
49 // This file is not part of the Qt API. It exists purely as an
50 // implementation detail. This header file may change from version to
51 // version without notice, or even be removed.
56 #include "qdeclarativejsglobal_p.h"
58 #include <QtCore/qglobal.h>
59 #include <QtCore/qshareddata.h>
60 #include <QtCore/qdebug.h>
64 QT_QML_BEGIN_NAMESPACE
66 namespace QDeclarativeJS {
68 class QML_PARSER_EXPORT MemoryPool : public QSharedData
70 MemoryPool(const MemoryPool &other);
71 void operator =(const MemoryPool &other);
85 for (int i = 0; i < _allocatedBlocks; ++i) {
86 if (char *b = _blocks[i])
94 inline void *allocate(size_t size)
96 size = (size + 7) & ~7;
97 if (_ptr && (_ptr + size < _end)) {
102 return allocate_helper(size);
112 void *allocate_helper(size_t size)
114 Q_ASSERT(size < BLOCK_SIZE);
116 if (++_blockCount == _allocatedBlocks) {
117 if (! _allocatedBlocks)
118 _allocatedBlocks = DEFAULT_BLOCK_COUNT;
120 _allocatedBlocks *= 2;
122 _blocks = (char **) qRealloc(_blocks, sizeof(char *) * _allocatedBlocks);
124 for (int index = _blockCount; index < _allocatedBlocks; ++index)
128 char *&block = _blocks[_blockCount];
131 block = (char *) qMalloc(BLOCK_SIZE);
134 _end = _ptr + BLOCK_SIZE;
143 int _allocatedBlocks;
150 BLOCK_SIZE = 8 * 1024,
151 DEFAULT_BLOCK_COUNT = 8
155 class QML_PARSER_EXPORT Managed
157 Managed(const Managed &other);
158 void operator = (const Managed &other);
164 void *operator new(size_t size, MemoryPool *pool) { return pool->allocate(size); }
165 void operator delete(void *) {}
166 void operator delete(void *, MemoryPool *) {}
169 } // namespace QDeclarativeJS