qohosdeadlockprotector.h

Go to the documentation of this file.

// Copyright (C) 2025 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 QOHOS_DEADLOCKPROTECTOR_H
#define QOHOS_DEADLOCKPROTECTOR_H
 
#include <QAtomicInt>
 
QT_BEGIN_NAMESPACE
 
class QOhosDeadlockProtector
{
public:
    QOhosDeadlockProtector()
        : m_acquired(0)
    {
    }
 
    ~QOhosDeadlockProtector() {
        if (m_acquired)
            s_blocked.storeRelease(0);
    }
 
    bool acquire() {
        m_acquired = s_blocked.testAndSetAcquire(0, 1);
        return m_acquired;
    }
 
private:
    static QAtomicInt s_blocked;
    int m_acquired;
};
 
QT_END_NAMESPACE
 
#endif // QOHOS_DEADLOCKPROTECTOR_H