// pop uri from the queue
MyUri DequeueUri()
{
Monitor.Enter(queueURLS);
MyUri uri = null;
try
{
uri = (MyUri)queueURLS.Dequeue();
}
catch (Exception)
{
}
Monitor.Exit(queueURLS);
return uri;
}
// push uri to the queue
bool EnqueueUri(MyUri uri, bool bCheckRepetition)
{
// add the uri to the binary tree to check if it is duplicated or not
if (bCheckRepetition == true)
return false;
Monitor.Enter(queueURLS);
try
{
// add the uri to the queue
queueURLS.Enqueue(uri);
}
catch (Exception)
{
}
Monitor.Exit(queueURLS);
return true;
}
