public void TestBarrierMethods()
{
// Define variables and constants
StateMutationBarrier testBarrier = new StateMutationBarrier();
object lockObj = new object();
// Set up context
// Execute
testBarrier.AcquirePermit().Dispose();
var permit = testBarrier.AcquirePermit(withLock: lockObj);
Assert.IsTrue(Monitor.IsEntered(lockObj));
Assert.IsFalse(testBarrier.IsFrozen);
permit.Dispose();
#if !DEVELOPMENT && !RELEASE
try {
permit.Dispose();
Assert.Fail();
}
catch (AssuranceFailedException) { }
#endif
testBarrier.FreezeMutations();
Assert.IsTrue(testBarrier.IsFrozen);
testBarrier.UnfreezeMutations();
Assert.IsFalse(testBarrier.IsFrozen);
Thread t = new Thread(testBarrier.FreezeMutations);
t.Start();
t.Join();
Assert.IsTrue(testBarrier.IsFrozen);
t = new Thread(() => {
try {
testBarrier.AcquirePermit();
Assert.Fail();
}
catch (ThreadAbortException) {
Thread.ResetAbort();
}
});
t.Start();
Thread.Sleep(500);
t.Abort();
// Assert outcome
}
internal MutationPermit(StateMutationBarrier barrier, object additionalLockObject)
{
Assure.NotNull(barrier);
if (Monitor.IsEntered(barrier.freezeLock))
{
throw new ApplicationException("Can not acquire permit: Mutations are locked from current thread.");
}
#if DEBUG
isDisposed = false;
#endif
this.barrier = barrier;
this.additionalLockObject = additionalLockObject;
lock (barrier.freezeLock) {
++barrier.activeMutatorsCounter;
}
if (additionalLockObject != null)
{
Monitor.Enter(additionalLockObject);
}
}