| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL21$ |
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| ****************************************************************************/ |
| |
| #ifndef QSYSTEMSEMAPHORE_H |
| #define QSYSTEMSEMAPHORE_H |
| |
| #include <QtCore/qstring.h> |
| #include <QtCore/qscopedpointer.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| #ifndef QT_NO_SYSTEMSEMAPHORE |
| |
| class QSystemSemaphorePrivate; |
| |
| class Q_CORE_EXPORT QSystemSemaphore |
| { |
| |
| public: |
| enum AccessMode |
| { |
| Open, |
| Create |
| }; |
| |
| enum SystemSemaphoreError |
| { |
| NoError, |
| PermissionDenied, |
| KeyError, |
| AlreadyExists, |
| NotFound, |
| OutOfResources, |
| UnknownError |
| }; |
| |
| QSystemSemaphore(const QString &key, int initialValue = 0, AccessMode mode = Open); |
| ~QSystemSemaphore(); |
| |
| void setKey(const QString &key, int initialValue = 0, AccessMode mode = Open); |
| QString key() const; |
| |
| bool acquire(); |
| bool release(int n = 1); |
| |
| SystemSemaphoreError error() const; |
| QString errorString() const; |
| |
| private: |
| Q_DISABLE_COPY(QSystemSemaphore) |
| QScopedPointer<QSystemSemaphorePrivate> d; |
| }; |
| |
| #endif // QT_NO_SYSTEMSEMAPHORE |
| |
| QT_END_NAMESPACE |
| |
| #endif // QSYSTEMSEMAPHORE_H |
| |