void ExerciseStandardUsage(ISyncLock lockObject, bool throwException)
{
using (AutoLock.Lock(lockObject))
{
Console.WriteLine("Inside autolock block");
if (throwException)
{
Console.WriteLine("Testing exception thrown in autolock block -- will now throw exception");
throw new IntentionalTestException("Intentional exception thrown inside of an autolock block");
}
}
InvalidOperationException unlockException = null;
Console.WriteLine("Validate that the lock is correctly unlocked after exiting using block");
try
{
lockObject.Unlock();
}
catch (InvalidOperationException e)
{
unlockException = e;
}
if (unlockException != null)
{
Console.WriteLine("Caught expected exception from unlocking an unlocked object");
}
else
{
throw new InvalidOperationException("Failed to get exception in unlocking unlocked object after an autolock was exited");
}
}
void VerifyUnlocked(ISyncLock syncLock)
{
InvalidOperationException tooManyUnlocksException = null;
try
{
syncLock.Unlock();
}
catch (InvalidOperationException e)
{
Console.WriteLine("Caught expected exception after unlocking too many times: {0}: {1}", e.GetType().ToString(), e.Message);
tooManyUnlocksException = e;
}
if (tooManyUnlocksException == null)
{
throw new InvalidOperationException("Unlock should not have succeeded after being in what should have been an unlocked state");
}
}
void TestLockWait(ISyncLock syncLock, TimeSpan waitBeforeCheckingLock, TimeSpan addtionalTimeBeforeRelease, bool waitForUnlock)
{
TimeSpan expectedWaitTime = new TimeSpan((long)(Math.Min(waitBeforeCheckingLock.Ticks, addtionalTimeBeforeRelease.Ticks))) + new TimeSpan(0,0,3);
lockCheckReadyAcquired.Reset();
lockReleaseEvent.Reset();
variationCompleteEvent.Reset();
lockWaitTime = waitBeforeCheckingLock; // +waitBeforeCheckingLock;
releaseDelay = addtionalTimeBeforeRelease;
lockThread = new Thread(LockThreadFunction);
lockThread.Start(syncLock);
WaitForLockAcquisition();
// This should expire
bool expired = ! syncLock.WaitForLock(new TimeSpan(0,0,0));
if (! expired)
{
throw new InvalidOperationException("Lock was released before expected, due to either lock defect or race conditions that should be rare");
}
// Tell the other thread to release the lock
lockReleaseEvent.Set();
DateTime waitStart = DateTime.UtcNow;
if (waitForUnlock)
{
WaitForLockRelease();
}
bool acquiredLock = syncLock.WaitForLock(lockWaitTime);
DateTime waitEnd = DateTime.UtcNow;
variationCompleteEvent.Set();
if (!acquiredLock)
{
if (waitForUnlock || ( waitBeforeCheckingLock > addtionalTimeBeforeRelease) )
{
throw new InvalidOperationException("Unable to acquire lock within the specified timeout");
}
else
{
Console.WriteLine("Wait for lock timed out as expected");
}
}
else
{
syncLock.Unlock();
if (waitBeforeCheckingLock < addtionalTimeBeforeRelease)
{
throw new InvalidOperationException("Wait did not time out as expected");
}
else
{
Console.WriteLine("Wait was satisfied as expected");
}
}
TimeSpan duration = waitEnd - waitStart;
Console.WriteLine("Expected wait time was {0} and actual time was {1}", expectedWaitTime, duration);
if (duration > expectedWaitTime)
{
throw new InvalidOperationException(string.Format("Expected wait time was {0} and actual time was {1}", expectedWaitTime, duration));
}
}