public TItem TakeConnection(TimeSpan timeout)
{
TItem item = null;
List <TItem> itemsToClose = null;
lock (ThisLock)
{
if (closed)
{
return(null);
}
bool closeItem;
while (true)
{
item = IdleConnections.Take(out closeItem);
if (item == null)
{
break;
}
if (!closeItem)
{
busyConnections.Add(item);
break;
}
if (itemsToClose == null)
{
itemsToClose = new List <TItem>();
}
itemsToClose.Add(item);
}
}
// cleanup any stale items accrued from IdleConnections
if (itemsToClose != null)
{
// and only allocate half the timeout passed in for our g----ful shutdowns
TimeoutHelper timeoutHelper = new TimeoutHelper(TimeoutHelper.Divide(timeout, 2));
for (int i = 0; i < itemsToClose.Count; i++)
{
CloseIdleConnection(itemsToClose[i], timeoutHelper.RemainingTime());
}
}
if (TD.ConnectionPoolMissIsEnabled())
{
if (item == null && busyConnections != null)
{
TD.ConnectionPoolMiss(key != null ? key.ToString() : string.Empty, busyConnections.Count);
}
}
return(item);
}