// Waits for a packet using an already generated WaitRequest. Will block
// the calling thread until a matching packet comes in.
// Returns the first matching packet.
public BluetoothPacket waitForPacket(WaitRequest req)
{
bool matches = false;
BluetoothPacket ret = null;
// Acquire a lock on the unprocessed packet queue to determine whether
// its necessary to block. Might already have a matching packet queued up.
lock (queue)
{
for (int i = 0; i < queue.Count; i++)
{
if (queue[i].matchesHead(req.packetHead))
{
matches = true;
ret = queue[i];
queue.RemoveAt(i);
break;
}
}
// No matches, add a wait request.
if (!matches)
{
waitRequests.Add(req);
}
}
if (matches) return ret;
// Block caller
req.Handle.WaitOne();
return req.actualPacket;
}
public void init()
{
packets = new List<BluetoothPacket>();
filterRequest = new WaitRequest(filterType);
newItemEvent = new AutoResetEvent(false);
BackgroundWorker filterWorker = new BackgroundWorker();
filterWorker.DoWork += new DoWorkEventHandler(filterLoop);
BackgroundWorker termWorker = new BackgroundWorker();
termWorker.DoWork += new DoWorkEventHandler(terminationLoop);
filterWorker.RunWorkerAsync();
termWorker.RunWorkerAsync();
}
// Get rid of a wait request
public bool removeWaitRequestFromQueue(WaitRequest req)
{
bool ret = false;
lock (queue)
{
ret = waitRequests.Remove(req);
}
return ret;
}