private void NotifyIfNeeded()
{
if (q.Count > 0 && units >= q.First.Value)
{
SyncUtils.Notify(mutex, q.First);
}
}
public bool Acquire(int requestedUnits, int timeout)
{
lock (mutex)
{
if (units >= requestedUnits && q.Count == 0)
{
units -= requestedUnits;
return(true);
}
var node = q.AddLast(requestedUnits);
TimeoutInstant limit = new TimeoutInstant(timeout);
do
{
try
{
SyncUtils.Wait(mutex, node, limit.Remaining);
}
catch (ThreadInterruptedException)
{
q.Remove(node);
NotifyIfNeeded();
throw;
}
if (node == q.First && units >= requestedUnits)
{
q.RemoveFirst();
units -= requestedUnits;
NotifyIfNeeded();
return(true);
}
if (limit.IsTimeout)
{
q.Remove(node);
NotifyIfNeeded();
return(false);
}
} while (true);
}
}