// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

//! [0]
forever {
    mutex.lock();
    keyPressed.wait(&mutex);
    do_something();
    mutex.unlock();
}
//! [0]


//! [1]
forever {
    getchar();
    keyPressed.wakeAll();
}
//! [1]


//! [2]
forever {
    mutex.lock();
    keyPressed.wait(&mutex);
    ++count;
    mutex.unlock();

    do_something();

    mutex.lock();
    --count;
    mutex.unlock();
}
//! [2]


//! [3]
forever {
    getchar();

    mutex.lock();
    // Sleep until there are no busy worker threads
    while (count > 0) {
        mutex.unlock();
        sleep(1);
        mutex.lock();
    }
    keyPressed.wakeAll();
    mutex.unlock();
}
//! [3]