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41
42 #ifndef QSYSTEMSEMAPHORE_H
43 #define QSYSTEMSEMAPHORE_H
44
45 #include <QtCore/qstring.h>
46 #include <QtCore/qscopedpointer.h>
47
48 QT_BEGIN_HEADER
49
50 QT_BEGIN_NAMESPACE
51
QT_MODULE(Core)52 QT_MODULE(Core)
53
54 #ifndef QT_NO_SYSTEMSEMAPHORE
55
56 class QSystemSemaphorePrivate;
57
58 class Q_CORE_EXPORT QSystemSemaphore
59 {
60
61 public:
62 enum AccessMode
63 {
64 Open,
65 Create
66 };
67
68 enum SystemSemaphoreError
69 {
70 NoError,
71 PermissionDenied,
72 KeyError,
73 AlreadyExists,
74 NotFound,
75 OutOfResources,
76 UnknownError
77 };
78
79 QSystemSemaphore(const QString &key, int initialValue = 0, AccessMode mode = Open);
80 ~QSystemSemaphore();
81
82 void setKey(const QString &key, int initialValue = 0, AccessMode mode = Open);
83 QString key() const;
84
85 bool acquire();
86 bool release(int n = 1);
87
88 SystemSemaphoreError error() const;
89 QString errorString() const;
90
91 private:
92 Q_DISABLE_COPY(QSystemSemaphore)
93 QScopedPointer<QSystemSemaphorePrivate> d;
94 };
95
96 #endif // QT_NO_SYSTEMSEMAPHORE
97
98 QT_END_NAMESPACE
99
100 QT_END_HEADER
101
102 #endif // QSYSTEMSEMAPHORE_H
103
104