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40
41#ifndef QREADWRITELOCK_P_H
42#define QREADWRITELOCK_P_H
43
44//
45// W A R N I N G
46// -------------
47//
48// This file is not part of the Qt API. It exists for the convenience
49// of the implementation. This header file may change from version to
50// version without notice, or even be removed.
51//
52// We mean it.
53//
54
55#include <QtCore/private/qglobal_p.h>
56#include <QtCore/qhash.h>
57#include <QtCore/QWaitCondition>
58
59#ifndef QT_NO_THREAD
60
61QT_BEGIN_NAMESPACE
62
63class QReadWriteLockPrivate
64{
65public:
66 QReadWriteLockPrivate(bool isRecursive = false)
67 : readerCount(0), writerCount(0), waitingReaders(0), waitingWriters(0),
68 recursive(isRecursive), id(0), currentWriter(nullptr) {}
69
70 QMutex mutex;
71 QWaitCondition writerCond;
72 QWaitCondition readerCond;
73 int readerCount;
74 int writerCount;
75 int waitingReaders;
76 int waitingWriters;
77 const bool recursive;
78
79 //Called with the mutex locked
80 bool lockForWrite(int timeout);
81 bool lockForRead(int timeout);
82 void unlock();
83
84 //memory management
85 int id;
86 void release();
87 static QReadWriteLockPrivate *allocate();
88
89 // Recusive mutex handling
90 Qt::HANDLE currentWriter;
91 QHash<Qt::HANDLE, int> currentReaders;
92
93 // called with the mutex unlocked
94 bool recursiveLockForWrite(int timeout);
95 bool recursiveLockForRead(int timeout);
96 void recursiveUnlock();
97
98};
99
100QT_END_NAMESPACE
101
102#endif // QT_NO_THREAD
103
104#endif // QREADWRITELOCK_P_H
105