public IAsyncResult BeginReceiveMessages(int messageCount, TimeSpan timeout, AsyncCallback callback, object state)
{
List <AmqpMessage> amqpMessages = new List <AmqpMessage>();
lock (this.syncRoot)
{
if (this.messageQueue != null && this.messageQueue.Count > 0)
{
for (int i = 0; i < messageCount && this.messageQueue.Count > 0; i++)
{
amqpMessages.Add(this.messageQueue.Dequeue());
}
}
}
if (amqpMessages.Any <AmqpMessage>() || !(timeout > TimeSpan.Zero))
{
return(new CompletedAsyncResult <IEnumerable <AmqpMessage> >(amqpMessages, callback, state));
}
ReceivingAmqpLink.ReceiveAsyncResult receiveAsyncResult = new ReceivingAmqpLink.ReceiveAsyncResult(this, timeout, callback, state);
bool flag = true;
lock (this.syncRoot)
{
if (this.messageQueue != null)
{
if (this.messageQueue.Count <= 0)
{
receiveAsyncResult.Initialize(this.waiterList.AddLast(receiveAsyncResult));
flag = false;
int num = (base.Settings.AutoSendFlow ? 0 : this.GetOnDemandReceiveCredit());
if (num > 0)
{
base.IssueCredit((uint)num, false, AmqpConstants.NullBinary);
}
}
else
{
int num1 = 0;
while (num1 < messageCount)
{
if (this.messageQueue.Count > 0)
{
amqpMessages.Add(this.messageQueue.Dequeue());
num1++;
}
else
{
break;
}
}
}
}
}
if (flag)
{
receiveAsyncResult.Signal(amqpMessages, true);
}
return(receiveAsyncResult);
}
