public bool WaitOne(int timeout)
{
QueueSync queueSync;
lock (_mainSync) {
if (_currentCount > 0)
{
_currentCount--;
return(true);
}
else
{
queueSync = new QueueSync();
_queueSyncs.Enqueue(queueSync);
}
}
lock (queueSync) {
if (queueSync.IsSignaled || Monitor.Wait(queueSync, timeout))
{
return(true);
}
else
{
queueSync.IsAbandoned = true;
return(false);
}
}
}
public void Release()
{
lock (_mainSync) {
if (_currentCount >= _maximumCount)
{
throw new SemaphoreFullException();
}
CheckQueue:
if (_queueSyncs.Count == 0)
{
_currentCount++;
}
else
{
QueueSync queueSync = _queueSyncs.Dequeue();
lock (queueSync) {
if (queueSync.IsAbandoned)
{
goto CheckQueue;
}
// Backup signal in case we acquired the lock before the waiter
queueSync.IsSignaled = true;
Monitor.Pulse(queueSync);
}
}
}
}
public void Release()
{
lock (_mainSync) {
if (_currentCount >= _maximumCount) // Workaround for Mono
{
Type semaphoreException = Type.GetType("System.Threading.SemaphoreFullException");
object exception = Activator.CreateInstance(semaphoreException);
throw (SystemException)exception;
}
CheckQueue:
if (_queueSyncs.Count == 0)
{
_currentCount++;
}
else
{
QueueSync queueSync = _queueSyncs.Dequeue();
lock (queueSync) {
if (queueSync.IsAbandoned)
{
goto CheckQueue;
}
// Backup signal in case we acquired the lock before the waiter
queueSync.IsSignaled = true;
Monitor.Pulse(queueSync);
}
}
}
}
