qt-creator/tests/unit/unittest/notification.h

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**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
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#include "googletest.h"

#include <condition_variable>
#include <mutex>

class Notification
{
public:
    void wait(int count = 1)
    {
        std::unique_lock<std::mutex> lock{m_mutex};
        m_waitCount += count;
        if (m_waitCount > 0)
            m_condition.wait(lock, [&] { return m_waitCount <= 0; });
    }

    void notify()
    {
        {
            std::unique_lock<std::mutex> lock{m_mutex};
            --m_waitCount;
        }

        m_condition.notify_all();
    }

private:
    std::mutex m_mutex;
    std::condition_variable m_condition;
    int m_waitCount = 0;
};