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39
40#ifndef QSYSTEMSEMAPHORE_H
41#define QSYSTEMSEMAPHORE_H
42
43#include <QtCore/qstring.h>
44#include <QtCore/qscopedpointer.h>
45
46QT_BEGIN_NAMESPACE
47
48
49#ifndef QT_NO_SYSTEMSEMAPHORE
50
51class QSystemSemaphorePrivate;
52
53class Q_CORE_EXPORT QSystemSemaphore
54{
55
56public:
57 enum AccessMode
58 {
59 Open,
60 Create
61 };
62
63 enum SystemSemaphoreError
64 {
65 NoError,
66 PermissionDenied,
67 KeyError,
68 AlreadyExists,
69 NotFound,
70 OutOfResources,
71 UnknownError
72 };
73
74 QSystemSemaphore(const QString &key, int initialValue = 0, AccessMode mode = Open);
75 ~QSystemSemaphore();
76
77 void setKey(const QString &key, int initialValue = 0, AccessMode mode = Open);
78 QString key() const;
79
80 bool acquire();
81 bool release(int n = 1);
82
83 SystemSemaphoreError error() const;
84 QString errorString() const;
85
86private:
87 Q_DISABLE_COPY(QSystemSemaphore)
88 QScopedPointer<QSystemSemaphorePrivate> d;
89};
90
91#endif // QT_NO_SYSTEMSEMAPHORE
92
93QT_END_NAMESPACE
94
95#endif // QSYSTEMSEMAPHORE_H
96
97