1 files changed, 25 insertions, 19 deletions
diff --git a/src/database.h b/src/database.h
index f877b74d3..d8d86fa5d 100644
--- a/src/database.h
+++ b/src/database.h
@@ -35,19 +35,29 @@ struct db_visitor;
 /**
  * Initialize the database library.
  *
- * @param path the absolute path of the database file
+ * @param param the database configuration block
  */
 bool
-db_init(const struct config_param *path, GError **error_r);
+db_init(const struct config_param *param, GError **error_r);
 
 void
 db_finish(void);
 
 /**
+ * Check whether the default #SimpleDatabasePlugin is used.  This
+ * allows using db_get_root(), db_save(), db_get_mtime() and
+ * db_exists().
+ */
+bool
+db_is_simple(void);
+
+/**
  * Returns the root directory object.  Returns NULL if there is no
  * configured music directory.
+ *
+ * May only be used if db_is_simple() returns true.
  */
-G_GNUC_PURE
+gcc_pure
 struct directory *
 db_get_root(void);
 
@@ -55,41 +65,37 @@ db_get_root(void);
  * Caller must lock the #db_mutex.
  */
 gcc_nonnull(1)
-G_GNUC_PURE
+gcc_pure
 struct directory *
 db_get_directory(const char *name);
 
 gcc_nonnull(1)
-G_GNUC_PURE
+gcc_pure
 struct song *
 db_get_song(const char *file);
 
-gcc_nonnull(1,2)
-bool
-db_visit(const struct db_selection *selection,
-	 const struct db_visitor *visitor, void *ctx,
-	 GError **error_r);
-
-gcc_nonnull(1,2)
-bool
-db_walk(const char *uri,
-	const struct db_visitor *visitor, void *ctx,
-	GError **error_r);
-
+/**
+ * May only be used if db_is_simple() returns true.
+ */
 bool
 db_save(GError **error_r);
 
 bool
 db_load(GError **error);
 
-G_GNUC_PURE
+/**
+ * May only be used if db_is_simple() returns true.
+ */
+gcc_pure
 time_t
 db_get_mtime(void);
 
 /**
  * Returns true if there is a valid database file on the disk.
+ *
+ * May only be used if db_is_simple() returns true.
  */
-G_GNUC_PURE
+gcc_pure
 static inline bool
 db_exists(void)
 {