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();
}
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();
threadsTurn.release();
testsTurn.acquire();
lockCount.deref();
readWriteLock.unlock();
threadsTurn.release();
// stop thread
testsTurn.acquire();
threadsTurn.release();
thread.wait();
QCOMPARE(thread.failureCount, 0);
}
}
