C++ (Cpp) QReadWriteLock::tryLockForRead示例

示例#1

文件： sipQtCoreQReadWriteLock.cpp 项目： annelida/stuff

static PyObject *meth_QReadWriteLock_tryLockForRead(PyObject *sipSelf, PyObject *sipArgs)
{
    PyObject *sipParseErr = NULL;

    {
        QReadWriteLock *sipCpp;

        if (sipParseArgs(&sipParseErr, sipArgs, "B", &sipSelf, sipType_QReadWriteLock, &sipCpp))
        {
            bool sipRes;

            Py_BEGIN_ALLOW_THREADS
            sipRes = sipCpp->tryLockForRead();
            Py_END_ALLOW_THREADS

            return PyBool_FromLong(sipRes);
        }
    }

示例#2

文件： tst_qreadwritelock.cpp 项目： RS102839/qt

            void run()
            {
                testsTurn.release();

                threadsTurn.acquire();
                QVERIFY(!readWriteLock.tryLockForRead());
                testsTurn.release();

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

                threadsTurn.acquire();
                QTime timer;
                timer.start();
                QVERIFY(!readWriteLock.tryLockForRead(1000));
                QVERIFY(timer.elapsed() >= 1000);
                testsTurn.release();

                threadsTurn.acquire();
                timer.start();
                QVERIFY(readWriteLock.tryLockForRead(1000));
                QVERIFY(timer.elapsed() <= 1000);
                lockCount.ref();
                QVERIFY(readWriteLock.tryLockForRead(1000));
                lockCount.ref();
                lockCount.deref();
                readWriteLock.unlock();
                lockCount.deref();
                readWriteLock.unlock();
                testsTurn.release();

                threadsTurn.acquire();
            }

示例#3

文件： tst_qreadwritelock.cpp 项目： RS102839/qt

void tst_QReadWriteLock::tryReadLock()
{
    QReadWriteLock rwlock;
    QVERIFY(rwlock.tryLockForRead());
    rwlock.unlock();
    QVERIFY(rwlock.tryLockForRead());
    rwlock.unlock();

    rwlock.lockForRead();
    rwlock.lockForRead();
    QVERIFY(rwlock.tryLockForRead());
    rwlock.unlock();
    rwlock.unlock();
    rwlock.unlock();

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

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

                threadsTurn.acquire();
                QVERIFY(!readWriteLock.tryLockForRead());
                testsTurn.release();

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

                threadsTurn.acquire();
                QTime timer;
                timer.start();
                QVERIFY(!readWriteLock.tryLockForRead(1000));
                QVERIFY(timer.elapsed() >= 1000);
                testsTurn.release();

                threadsTurn.acquire();
                timer.start();
                QVERIFY(readWriteLock.tryLockForRead(1000));
                QVERIFY(timer.elapsed() <= 1000);
                lockCount.ref();
                QVERIFY(readWriteLock.tryLockForRead(1000));
                lockCount.ref();
                lockCount.deref();
                readWriteLock.unlock();
                lockCount.deref();
                readWriteLock.unlock();
                testsTurn.release();

                threadsTurn.acquire();
            }
        };

        Thread thread;
        thread.start();

        testsTurn.acquire();
        readWriteLock.lockForWrite();
        QVERIFY(lockCount.testAndSetRelaxed(0, 1));
        threadsTurn.release();

        testsTurn.acquire();
        QVERIFY(lockCount.testAndSetRelaxed(1, 0));
        readWriteLock.unlock();
        threadsTurn.release();

        testsTurn.acquire();
        readWriteLock.lockForWrite();
        QVERIFY(lockCount.testAndSetRelaxed(0, 1));
        threadsTurn.release();

        testsTurn.acquire();
        QVERIFY(lockCount.testAndSetRelaxed(1, 0));
        readWriteLock.unlock();
        threadsTurn.release();

        // stop thread
        testsTurn.acquire();
        threadsTurn.release();
        thread.wait();
    }
}