Qt 4.8
qmutexpool_p.h
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41 
42 #ifndef QMUTEXPOOL_P_H
43 #define QMUTEXPOOL_P_H
44 
45 //
46 // W A R N I N G
47 // -------------
48 //
49 // This file is not part of the Qt API. It exists for the convenience
50 // of QSettings. This header file may change from version to
51 // version without notice, or even be removed.
52 //
53 // We mean it.
54 //
55 
56 #include "QtCore/qatomic.h"
57 #include "QtCore/qmutex.h"
58 #include "QtCore/qvarlengtharray.h"
59 
60 #ifndef QT_NO_THREAD
61 
63 
65 {
66 public:
67  explicit QMutexPool(QMutex::RecursionMode recursionMode = QMutex::NonRecursive, int size = 131);
68  ~QMutexPool();
69 
70  inline QMutex *get(const void *address) {
71  int index = uint(quintptr(address)) % mutexes.count();
72  QMutex *m = mutexes[index];
73  if (m)
74  return m;
75  else
76  return createMutex(index);
77  }
78  static QMutexPool *instance();
79  static QMutex *globalInstanceGet(const void *address);
80 
81 private:
82  QMutex *createMutex(int index);
85 };
86 
88 
90 
91 #endif // QT_NO_THREAD
92 
93 #endif // QMUTEXPOOL_P_H
QIntegerForSizeof< void * >::Unsigned quintptr
Definition: qglobal.h:986
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
The QMutex class provides access serialization between threads.
Definition: qmutex.h:60
QMutex::RecursionMode recursionMode
Definition: qmutexpool_p.h:84
Q_CORE_EXPORT QMutexPool * qt_global_mutexpool
Definition: qmutexpool.cpp:51
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
unsigned int uint
Definition: qglobal.h:996
QVarLengthArray< QAtomicPointer< QMutex >, 131 > mutexes
Definition: qmutexpool_p.h:83
RecursionMode
Definition: qmutex.h:66
#define Q_CORE_EXPORT
Definition: qglobal.h:1449
The QMutexPool class provides a pool of QMutex objects.
Definition: qmutexpool_p.h:64
quint16 index