C++ QReadWriteLock::tryLockForWrite方法代码示例

本文整理汇总了C++中QReadWriteLock::tryLockForWrite方法的典型用法代码示例。如果您正苦于以下问题：C++ QReadWriteLock::tryLockForWrite方法的具体用法？C++ QReadWriteLock::tryLockForWrite怎么用？C++ QReadWriteLock::tryLockForWrite使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QReadWriteLock的用法示例。

在下文中一共展示了QReadWriteLock::tryLockForWrite方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: run

            void run()
            {
                testsTurn.release();

                threadsTurn.acquire();
                if (readWriteLock.tryLockForWrite())
                    failureCount++;
                testsTurn.release();

                threadsTurn.acquire();
                if (!readWriteLock.tryLockForWrite())
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(0, 1))
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(1, 0))
                    failureCount++;
                readWriteLock.unlock();
                testsTurn.release();

                threadsTurn.acquire();
                if (readWriteLock.tryLockForWrite(1000))
                    failureCount++;
                testsTurn.release();

                threadsTurn.acquire();
                if (!readWriteLock.tryLockForWrite(1000))
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(0, 1))
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(1, 0))
                    failureCount++;
                readWriteLock.unlock();
                testsTurn.release();

                threadsTurn.acquire();
            }

开发者ID:RS102839，项目名称:qt，代码行数:36，代码来源:tst_qreadwritelock.cpp

示例2: tryWriteLock

void tst_QReadWriteLock::tryWriteLock()
{
    {
        QReadWriteLock rwlock;
        QVERIFY(rwlock.tryLockForWrite());
        rwlock.unlock();
        QVERIFY(rwlock.tryLockForWrite());
        rwlock.unlock();

        rwlock.lockForWrite();
        QVERIFY(!rwlock.tryLockForWrite());
        QVERIFY(!rwlock.tryLockForWrite());
        rwlock.unlock();

        rwlock.lockForRead();
        QVERIFY(!rwlock.tryLockForWrite());
        rwlock.unlock();
    }

    {
        QReadWriteLock rwlock(QReadWriteLock::Recursive);
        QVERIFY(rwlock.tryLockForWrite());
        rwlock.unlock();
        QVERIFY(rwlock.tryLockForWrite());
        rwlock.unlock();

        rwlock.lockForWrite();
        QVERIFY(rwlock.tryLockForWrite());
        QVERIFY(rwlock.tryLockForWrite());
        rwlock.unlock();
        rwlock.unlock();
        rwlock.unlock();

        rwlock.lockForRead();
        QVERIFY(!rwlock.tryLockForWrite());
        rwlock.unlock();
    }

    // functionality test
    {
        class Thread : public QThread
        {
        public:
            Thread() : failureCount(0) { }
            void run()
            {
                testsTurn.release();

                threadsTurn.acquire();
                if (readWriteLock.tryLockForWrite())
                    failureCount++;
                testsTurn.release();

                threadsTurn.acquire();
                if (!readWriteLock.tryLockForWrite())
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(0, 1))
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(1, 0))
                    failureCount++;
                readWriteLock.unlock();
                testsTurn.release();

                threadsTurn.acquire();
                if (readWriteLock.tryLockForWrite(1000))
                    failureCount++;
                testsTurn.release();

                threadsTurn.acquire();
                if (!readWriteLock.tryLockForWrite(1000))
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(0, 1))
                    failureCount++;
                if (!lockCount.testAndSetRelaxed(1, 0))
                    failureCount++;
                readWriteLock.unlock();
                testsTurn.release();

                threadsTurn.acquire();
            }

            int failureCount;
        };

        Thread thread;
        thread.start();

        testsTurn.acquire();
        readWriteLock.lockForRead();
        lockCount.ref();
        threadsTurn.release();

        testsTurn.acquire();
        lockCount.deref();
        readWriteLock.unlock();
        threadsTurn.release();

        testsTurn.acquire();
        readWriteLock.lockForRead();
        lockCount.ref();
//.........这里部分代码省略.........

开发者ID:RS102839，项目名称:qt，代码行数:101，代码来源:tst_qreadwritelock.cpp

注：本文中的QReadWriteLock::tryLockForWrite方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。