+ std::pair<PlaylistMap::iterator,bool> res;
+ std::pair<boost::shared_ptr<Playlist>, uint32_t> newpair (pl, 1);
+ Glib::Mutex::Lock lm (playlist_lock);
+
+ res = _playlists.insert (newpair);
+
+ if (!res.second) {
+ /* it already existed, bump count */
+ res.first->second++;
+ }
+
+ pl->GoingAway.connect (bind (mem_fun (*this, &Source::remove_playlist), boost::weak_ptr<Playlist> (pl)));