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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
//! [0]
QSystemSemaphore sem(QSystemSemaphore::platformSafeKey("market"), 3, QSystemSemaphore::Create);
// resources available == 3
sem.acquire(); // resources available == 2
sem.acquire(); // resources available == 1
sem.acquire(); // resources available == 0
sem.release(); // resources available == 1
sem.release(2); // resources available == 3
//! [0]
//! [1]
QSystemSemaphore sem(QSystemSemaphore::platformSafeKey("market"), 5, QSystemSemaphore::Create);
for (int i = 0; i < 5; ++i) // acquire all 5 resources
sem.acquire();
sem.release(5); // release the 5 resources
//! [1]
//! [2]
sem.release(10); // "create" 10 new resources
//! [2]
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