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); } }