Playlist: add constructor and destructor

src/Partition.hxx

@@ -35,12 +35,8 @@ struct Partition {
 	Partition(unsigned max_length,
 		  unsigned buffer_chunks,
 		  unsigned buffered_before_play)
-		:pc(buffer_chunks, buffered_before_play) {
-		playlist_init(&playlist, max_length);
-	}
-
-	~Partition() {
-		playlist_finish(&playlist);
+		:playlist(max_length),
+		 pc(buffer_chunks, buffered_before_play) {
 	}
 };
 

src/Playlist.cxx

@@ -52,21 +52,6 @@ playlist_tag_changed(struct playlist *playlist)
 	idle_add(IDLE_PLAYLIST);
 }
 
-void
-playlist_init(struct playlist *playlist, unsigned max_length)
-{
-	queue_init(&playlist->queue, max_length);
-
-	playlist->queued = -1;
-	playlist->current = -1;
-}
-
-void
-playlist_finish(struct playlist *playlist)
-{
-	queue_finish(&playlist->queue);
-}
-
 /**
  * Queue a song, addressed by its order number.
  */

src/Playlist.hxx

@@ -68,17 +68,20 @@ struct playlist {
 	 * This variable is only valid if #playing is true.
 	 */
 	int queued;
+
+	playlist(unsigned max_length)
+		:current(-1), queued(-1) {
+		queue_init(&queue, max_length);
+	}
+
+	~playlist() {
+		queue_finish(&queue);
+	}
 };
 
 void
 playlist_global_init();
 
-void
-playlist_init(struct playlist *playlist, unsigned max_length);
-
-void
-playlist_finish(struct playlist *playlist);
-
 void
 playlist_tag_changed(struct playlist *playlist);