本文整理汇总了C++中QReadWriteLock::tryLockForRead方法的典型用法代码示例。如果您正苦于以下问题：C++ QReadWriteLock::tryLockForRead方法的具体用法？C++ QReadWriteLock::tryLockForRead怎么用？C++ QReadWriteLock::tryLockForRead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::tryLockForRead方法的3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: PyBool_FromLong
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: run
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: tryReadLock
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();
}
}