1 files changed, 75 insertions, 0 deletions
diff --git a/src/corelib/ipc/qsystemsemaphore.h b/src/corelib/ipc/qsystemsemaphore.h
new file mode 100644
index 0000000000..df6fd28342
--- /dev/null
+++ b/src/corelib/ipc/qsystemsemaphore.h
@@ -0,0 +1,75 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QSYSTEMSEMAPHORE_H
+#define QSYSTEMSEMAPHORE_H
+
+#include <QtCore/qcoreapplication.h>
+#include <QtCore/qtipccommon.h>
+#include <QtCore/qstring.h>
+#include <QtCore/qscopedpointer.h>
+
+QT_BEGIN_NAMESPACE
+
+#if QT_CONFIG(systemsemaphore)
+
+class QSystemSemaphorePrivate;
+
+class Q_CORE_EXPORT QSystemSemaphore
+{
+    Q_GADGET
+    Q_DECLARE_TR_FUNCTIONS(QSystemSemaphore)
+public:
+    enum AccessMode
+    {
+        Open,
+        Create
+    };
+    Q_ENUM(AccessMode)
+
+    enum SystemSemaphoreError
+    {
+        NoError,
+        PermissionDenied,
+        KeyError,
+        AlreadyExists,
+        NotFound,
+        OutOfResources,
+        UnknownError
+    };
+
+    QSystemSemaphore(const QNativeIpcKey &key, int initialValue = 0, AccessMode = Open);
+    ~QSystemSemaphore();
+
+    void setNativeKey(const QNativeIpcKey &key, int initialValue = 0, AccessMode = Open);
+    void setNativeKey(const QString &key, int initialValue = 0, AccessMode mode = Open,
+                      QNativeIpcKey::Type type = QNativeIpcKey::legacyDefaultTypeForOs())
+    { setNativeKey({ key, type }, initialValue, mode); }
+    QNativeIpcKey nativeIpcKey() const;
+
+    QSystemSemaphore(const QString &key, int initialValue = 0, AccessMode mode = Open);
+    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;
+
+    static bool isKeyTypeSupported(QNativeIpcKey::Type type) Q_DECL_CONST_FUNCTION;
+    static QNativeIpcKey platformSafeKey(const QString &key,
+            QNativeIpcKey::Type type = QNativeIpcKey::DefaultTypeForOs);
+    static QNativeIpcKey legacyNativeKey(const QString &key,
+            QNativeIpcKey::Type type = QNativeIpcKey::legacyDefaultTypeForOs());
+
+private:
+    Q_DISABLE_COPY(QSystemSemaphore)
+    QScopedPointer<QSystemSemaphorePrivate> d;
+};
+
+#endif // QT_CONFIG(systemsemaphore)
+
+QT_END_NAMESPACE
+
+#endif // QSYSTEMSEMAPHORE_H