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// 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
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