blob: d1afba270e10052725bc2be4769049b7f730a2a6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
//! [0]
QSystemSemaphore sem("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("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]
|
