public async Task CheckHealthAsync_Warning_CheckWarned(long counterValue, long errorThreshold, long warningThreshold)
{
var counter = new LocalCounter("test");
counter.Value = counterValue;
var counterProvider = new TestCounterProvider(counter);
var check = new CounterCheck(counterProvider);
var settings = new CounterCheckSettings("counter", false, 0, null, errorThreshold, warningThreshold, false);
var context = new HealthCheckContext(settings);
await check.CheckHealthAsync(context, settings);
Assert.True(context.HasWarned);
}
private T Enter()
{
// check if disposed
if (_disposed)
{
throw new InvalidOperationException(
$"Guarded<{typeof(T).Name}>.Locked: Object disposed!");
}
// debug temp todo remove - do not allow nested locks (thereby preventing deadlocking)
LocalCounter threadLockCounter;
int threadId = Thread.CurrentThread.ManagedThreadId;
lock (DebugThreadLockCounter)
{
if (!DebugThreadLockCounter.TryGetValue(threadId, out threadLockCounter))
{
threadLockCounter = new LocalCounter();
DebugThreadLockCounter[threadId] = threadLockCounter;
}
}
long nested = threadLockCounter.Increment();
// end debug
try
{
if (nested > 1)
{
throw new InvalidOperationException("Attempted secondary lock acquisition!");
}
int spinCount = 0;
T lockedObject;
while ((lockedObject = Interlocked.Exchange(ref _target, null)) == null)
{
// spin - todo - in .Net 4.0 use Thread.SpinWait()
bool sleep = false;
if (_IsSingleCore)
{
sleep = true;
}
else
{
// black magic from [email protected]
spinCount++;
// debug
if (spinCount % 4000 == 0)
{
sleep = true;
}
if (spinCount % 1000000000 == 0) // yes 1 billion, or about 1 second
{
// if you see this debug message, it is likely you have a deadlock
Debug.WriteLine($"Guarded<{typeof(T).Name}>.Enter: Spin={spinCount}");
}
// end debug
}
if (sleep)
{
// debug
long sleepCount = Interlocked.Increment(ref _debugSleepCount);
if (sleepCount % 100000 == 0)
{
// if you see this debug message, but not the message above, it is likely there
// is another thread locking the target object for very long periods.
Debug.WriteLine(String.Format("Guarded<{0}>.Enter: SleepCount={1}", typeof(T).Name, sleepCount));
}
// end debug
Thread.Sleep(0);
}
}
return(lockedObject);
}
finally
{
threadLockCounter.Decrement();
}
}
