bool wait(unsigned long time) { TInt err = KErrNone; if (time == ULONG_MAX) { // untimed wait, loop because RCondVar::Wait may return before the condition is triggered do { err = cond.Wait(mutex); } while (err == KErrNone && wakeups == 0); } else { unsigned long maxWait = KMaxTInt / 1000; QElapsedTimer waitTimer; do { waitTimer.start(); unsigned long waitTime = qMin(maxWait, time); // wait at least 1ms, as 0 means no wait err = cond.TimedWait(mutex, qMax(1ul, waitTime) * 1000); // RCondVar::TimedWait may return before the condition is triggered, update the timeout with actual wait time time -= qMin((unsigned long)waitTimer.elapsed(), waitTime); } while ((err == KErrNone && wakeups == 0) || (err == KErrTimedOut && time > 0)); } Q_ASSERT_X(waiters > 0, "QWaitCondition::wait", "internal error (waiters)"); --waiters; if (err == KErrNone) { Q_ASSERT_X(wakeups > 0, "QWaitCondition::wait", "internal error (wakeups)"); --wakeups; } mutex.Signal(); if (err && err != KErrTimedOut) report_error(err, "QWaitCondition::wait()", "cv wait"); return err == KErrNone; }
TInt Thread4(TAny* a) { volatile TInt& count = *(volatile TInt*)a; TInt r = KErrNone; M2.Wait(); while (r==KErrNone) { r = CV2.Wait(M2); ++count; } return r; }
TInt Thread3(TAny* a) { SThreadData2& d = *(SThreadData2*)a; RMutex m; RCondVar cv; TInt r = m.OpenGlobal(TPtrC(d.iMutexName), EOwnerThread); if (r!=KErrNone) return r; r = cv.OpenGlobal(TPtrC(d.iCondVarName), EOwnerThread); if (r!=KErrNone) return r; m.Wait(); while (r==KErrNone) { r = cv.Wait(m); ++d.iInnerLoops; } return r; }
TInt Thread0(TAny*) { return CV1.Wait(M1); }