private void Cleanup()
{
Monitor.Enter(this);
try
{
if (this._isWorkItemsQueueActive)
{
this._isWorkItemsQueueActive = false;
foreach (WorkItem workItem in this._workItems)
{
workItem.DisposeOfState();
}
this._workItems.Clear();
while (this._waitersCount > 0)
{
WorkItemsQueue.WaiterEntry waiterEntry = this.PopWaiter();
waiterEntry.Timeout();
}
}
}
finally
{
Monitor.Exit(this);
}
}
private WorkItemsQueue.WaiterEntry PopWaiter()
{
WorkItemsQueue.WaiterEntry nextWaiterEntry = this._headWaiterEntry._nextWaiterEntry;
WorkItemsQueue.WaiterEntry nextWaiterEntry2 = nextWaiterEntry._nextWaiterEntry;
this.RemoveWaiter(nextWaiterEntry, true);
this._headWaiterEntry._nextWaiterEntry = nextWaiterEntry2;
if (nextWaiterEntry2 != null)
{
nextWaiterEntry2._prevWaiterEntry = this._headWaiterEntry;
}
return(nextWaiterEntry);
}
public void PushWaiter(WorkItemsQueue.WaiterEntry newWaiterEntry)
{
this.RemoveWaiter(newWaiterEntry, false);
if (this._headWaiterEntry._nextWaiterEntry == null)
{
this._headWaiterEntry._nextWaiterEntry = newWaiterEntry;
newWaiterEntry._prevWaiterEntry = this._headWaiterEntry;
}
else
{
WorkItemsQueue.WaiterEntry nextWaiterEntry = this._headWaiterEntry._nextWaiterEntry;
this._headWaiterEntry._nextWaiterEntry = newWaiterEntry;
newWaiterEntry._nextWaiterEntry = nextWaiterEntry;
newWaiterEntry._prevWaiterEntry = this._headWaiterEntry;
nextWaiterEntry._prevWaiterEntry = newWaiterEntry;
}
this._waitersCount++;
}
private void RemoveWaiter(WorkItemsQueue.WaiterEntry waiterEntry, bool popDecrement)
{
WorkItemsQueue.WaiterEntry prevWaiterEntry = waiterEntry._prevWaiterEntry;
WorkItemsQueue.WaiterEntry nextWaiterEntry = waiterEntry._nextWaiterEntry;
bool flag = popDecrement;
waiterEntry._prevWaiterEntry = null;
waiterEntry._nextWaiterEntry = null;
if (prevWaiterEntry != null)
{
prevWaiterEntry._nextWaiterEntry = nextWaiterEntry;
flag = true;
}
if (nextWaiterEntry != null)
{
nextWaiterEntry._prevWaiterEntry = prevWaiterEntry;
flag = true;
}
if (flag)
{
this._waitersCount--;
}
}
public bool EnqueueWorkItem(WorkItem workItem)
{
if (workItem == null)
{
throw new ArgumentNullException("workItem", "workItem cannot be null");
}
bool flag = true;
Monitor.Enter(this);
try
{
this.ValidateNotDisposed();
if (!this._isWorkItemsQueueActive)
{
return(false);
}
while (this._waitersCount > 0)
{
WorkItemsQueue.WaiterEntry waiterEntry = this.PopWaiter();
if (waiterEntry.Signal(workItem))
{
flag = false;
break;
}
}
if (flag)
{
this._workItems.Enqueue(workItem);
}
}
finally
{
Monitor.Exit(this);
}
return(true);
}
