internal extern static int PeerCollabSetPresenceInfo(ref PEER_PRESENCE_INFO ppi);
internal override void PresenceChangedCallback(object state, bool timedOut) { SafeCollabData eventData = null; int errorCode = 0; Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "PresenceChangedCallback() called."); if (m_Disposed) { return; } while (true) { PresenceChangedEventArgs presenceChangedArgs = null; // // Get the event data for the fired event // try{ lock (LockPresenceChangedEvent){ if (m_safePresenceChangedEvent.IsInvalid) { return; } errorCode = UnsafeCollabNativeMethods.PeerCollabGetEventData(m_safePresenceChangedEvent, out eventData); } if (errorCode == UnsafeCollabReturnCodes.PEER_S_NO_EVENT_DATA) { break; } else if (errorCode != 0) { Logging.P2PTraceSource.TraceEvent(TraceEventType.Error, 0, "PeerCollabGetEventData returned with errorcode {0}", errorCode); throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Collab_GetPresenceChangedDataFailed), errorCode); } PEER_COLLAB_EVENT_DATA ped = (PEER_COLLAB_EVENT_DATA)Marshal.PtrToStructure(eventData.DangerousGetHandle(), typeof(PEER_COLLAB_EVENT_DATA)); if (ped.eventType == PeerCollabEventType.MyPresenceChanged) { PEER_EVENT_PRESENCE_CHANGED_DATA presenceData = ped.presenceChangedData; PeerPresenceInfo peerPresenceInfo = null; if (presenceData.pPresenceInfo != IntPtr.Zero) { PEER_PRESENCE_INFO ppi = (PEER_PRESENCE_INFO)Marshal.PtrToStructure(presenceData.pPresenceInfo, typeof(PEER_PRESENCE_INFO)); peerPresenceInfo = new PeerPresenceInfo(); peerPresenceInfo.PresenceStatus = ppi.status; peerPresenceInfo.DescriptiveText = ppi.descText; } PeerEndPoint peerEndPoint = null; if (presenceData.pEndPoint != IntPtr.Zero) { PEER_ENDPOINT pe = (PEER_ENDPOINT)Marshal.PtrToStructure(presenceData.pEndPoint, typeof(PEER_ENDPOINT)); peerEndPoint = CollaborationHelperFunctions.ConvertPEER_ENDPOINTToPeerEndPoint(pe); } presenceChangedArgs = new PresenceChangedEventArgs(peerEndPoint, null, presenceData.changeType, peerPresenceInfo); } } finally{ if (eventData != null) { eventData.Dispose(); } } // // Fire the callback with the marshalled event args data // if (presenceChangedArgs != null) { OnPresenceChanged(presenceChangedArgs); } } Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "Leaving PresenceChangedCallback()."); }