internal void StatusThread()
{
// Ask the system to notify our message queue when devices of
// the indicated class are added or removed.
IntPtr h = RequestDeviceNotifications(
devClass.ToGuid().ToByteArray(),
mq.Handle, fAll);
// Wait for the queue to be signaled. When it is, decode
// the message and call any listeners for it. If the
// queue closes suddenly, that's our cue to exit, shutting
// down notifications before we leave.
PointToPointMsgQueue q = mq;
while (mq != null) // Check the global object here.
{
// Wait. On return, true indicates that the queue is
// signaled; false is a chance to check whether we should
// exit.
if (q.Wait(-1))
{
// Read the event data.
int bytes = 0;
PointToPointMsgQueueFlags readFlags = 0;
DEVDETAIL devDetail = new DEVDETAIL();
if (q.ReadMsgQueue(devDetail.getBytes(),
DEVDETAIL.MAX_DEVDETAIL_SIZE,
ref bytes, -1, ref readFlags))
{
// Handle the event.
OnDeviceNotification(new DeviceNotificationArgs(
devDetail.guidDevClass, devDetail.fAttached,
devDetail.szName));
}
}
else
{
System.Diagnostics.Debug.WriteLine(this, "mq is null in monitoring thread. Exiting...");
}
}
System.Diagnostics.Debug.WriteLine(this, "exiting DeviceStatusMonitor thread.");
// Stop notifications to us.
StopDeviceNotifications(h);
}