public bool TryReenter(ReentryMode reentryMode)
{
if (reentryMode == ReentryMode.CheckedFail)
{
if (Count > 0)
{
throw Errors.AlreadyLocked();
}
return(false);
}
var spinWait = new SpinWait();
var count = Count;
while (count > 0)
{
var oldCount = Interlocked.CompareExchange(ref _count, count + 1, count);
if (oldCount == count)
{
return(true);
}
count = oldCount;
spinWait.SpinOnce();
}
return(false);
}
public int Enter(ReentryMode reentryMode)
{
if (reentryMode != ReentryMode.CheckedFail)
{
return(Interlocked.Increment(ref _count));
}
if (0 != Interlocked.CompareExchange(ref _count, 1, 0))
{
throw Errors.AlreadyLocked();
}
return(1);
}