try to avoid a media_addon_server crash on quit (bug #5863).

* BMediaRosterEx::ReleaseNodeAll(): if media_server isn't available,
try to contact the node locally.
* BMediaRoster::UnregisterNode(): if media_server isn't available,
try to get the addon_id from the local node.
* BMediaNode::AddOn() as a pure virtual methode isn't available in the
BMediaNode destructor. Workaround that by calling UnregisterNode()
in DeleteHook() instead of the destructor.
* MediaAddonServer::_DestroyInstantiatedFlavors(): give time to each
flavor to clean up.

src/kits/media/MediaNode.cpp

@@ -148,12 +148,9 @@ BMediaNode::~BMediaNode()
 		fTimeSource = NULL;
 	}
 
-	// Attention! We do not unregister TimeSourceObject nodes,
+	// Attention! We do not delete their control ports, since they are only a
-	// or delete their control ports, since they are only a
 	// shadow object, and the real one still exists
 	if (0 == (fKinds & NODE_KIND_SHADOW_TIMESOURCE)) {
-		BMediaRoster::Roster()->UnregisterNode(this);
-
 		if (fControlPort > 0)
 			delete_port(fControlPort);
 	} else {
@@ -829,6 +826,10 @@ BMediaNode::ApplyChangeTag(int32 previously_reserved)
 BMediaNode::DeleteHook(BMediaNode *node)
 {
 	CALLED();
+	// Attention! We do not unregister TimeSourceObject nodes,
+	// since they are only a shadow object, and the real one still exists
+	if ((fKinds & NODE_KIND_SHADOW_TIMESOURCE) == 0)
+		BMediaRoster::Roster()->UnregisterNode(this);
 	delete this; // delete "this" or "node", both are the same
 	return B_OK;
 }

src/kits/media/MediaRoster.cpp

@@ -220,11 +220,20 @@ BMediaRosterEx::ReleaseNodeAll(const media_node& node)
 
 	rv = QueryServer(SERVER_RELEASE_NODE_ALL, &request, sizeof(request), &reply,
 		sizeof(reply));
+	if (rv != B_OK) {
+		ERROR("BMediaRoster::ReleaseNodeAll failed to query media_server, "
+			"retrying local, node %" B_PRId32 ", port %"
+			B_PRId32 ", team %" B_PRId32 "!\n", node.node, node.port,
+			BPrivate::current_team());
+		node_final_release_command command;
+		rv = SendToPort(node.port, NODE_FINAL_RELEASE, &command,
+			sizeof(command));
 		if (rv != B_OK) {
 			ERROR("BMediaRoster::ReleaseNodeAll FAILED, node %" B_PRId32 ", port %"
 				B_PRId32 ", team %" B_PRId32 "!\n", node.node, node.port,
 				BPrivate::current_team());
 		}
+	}
 	return rv;
 }
 
@@ -2079,13 +2088,16 @@ BMediaRoster::UnregisterNode(BMediaNode* node)
 	BPrivate::media::notifications::NodesDeleted(&request.node_id, 1);
 
 	server_unregister_node_reply reply;
+	reply.add_on_id = -1;
 	status_t status = QueryServer(SERVER_UNREGISTER_NODE, &request,
 		sizeof(request), &reply, sizeof(reply));
 	if (status != B_OK) {
 		ERROR("BMediaRoster::UnregisterNode: failed to unregister node id %"
 			B_PRId32 ", name '%s': %s\n", node->ID(), node->Name(),
 			strerror(status));
-		return status;
+		BMediaAddOn *addon = node->AddOn(&reply.flavor_id);
+		if (addon != NULL)
+			reply.add_on_id = addon->AddonID();
 	}
 
 	if (reply.add_on_id != -1) {
@@ -2110,7 +2122,7 @@ BMediaRoster::UnregisterNode(BMediaNode* node)
 	// we are a friend class of BMediaNode and invalidate this member variable
 	node->fNodeID = NODE_UNREGISTERED_ID;
 
-	return B_OK;
+	return status;
 }
 
 
@@ -3309,4 +3321,3 @@ BMediaRoster::SetRunningDefault(media_node_id forDefault,
 
 
 BMediaRoster* BMediaRoster::sDefaultInstance = NULL;
-

src/servers/media_addon/MediaAddonServer.cpp

@@ -651,7 +651,13 @@ MediaAddonServer::_DestroyInstantiatedFlavors(AddOnInfo& info)
 			}
 		}
 
-		MediaRosterEx(fMediaRoster)->ReleaseNodeAll(node);
+		if (MediaRosterEx(fMediaRoster)->ReleaseNodeAll(node) != B_OK) {
+			printf("MediaAddonServer::_DestroyInstantiatedFlavors "
+						"couldn't release node\n");
+		}
+
+		// wait a bit to let the node clean up
+		snooze(50000);
 	}
 
 	info.active_flavors.clear();
@@ -798,4 +804,3 @@ main()
 	delete be_app;
 	return 0;
 }
-