public void AlreadyOwned()
{
DateTime start, end;
object monitor = new object();
lock (monitor)
{
start = DateTime.UtcNow;
for (int i = 0; i < Iterations; i++)
{
lock (monitor)
{
}
}
end = DateTime.UtcNow;
}
TimeSpan nativeTime = end - start;
SyncLock syncLock = new SyncLock(Timeout.Infinite);
using (syncLock.Lock())
{
start = DateTime.UtcNow;
for (int i = 0; i < Iterations; i++)
{
using (syncLock.Lock())
{
}
}
end = DateTime.UtcNow;
}
TimeSpan syncLockTime = end - start;
double factor = syncLockTime.TotalMilliseconds / nativeTime.TotalMilliseconds;
Console.WriteLine("Performance of SyncLock (lock already owned):");
Console.WriteLine("Native: {0}", nativeTime);
Console.WriteLine("SyncLock: {0}", syncLockTime);
Console.WriteLine("Performance penalty factor: {0:0.00}", factor);
Console.WriteLine();
Assert.IsTrue(factor < 10, "SyncLock must not be ridiculously slow");
}
public void TimeoutThrowsException()
{
Thread t = LockSubjectInOtherThread();
try
{
Thread.Sleep(250);
using (subject.Lock(500))
{
}
Assert.Fail("Should have thrown an exception");
}
catch (LockTimeoutException)
{
// Expected
}
t.Join();
}