- make some used-only-locally functions static

- warn if a map is going to be empty, because it usually signals a
  misconfiguration of some kind

1 files changed, 4 insertions, 0 deletions

diff --git a/src/backend.h b/src/backend.h
index bf7bb40..e1dfa31 100644
--- a/src/backend.h
+++ b/src/backend.h
@@ -67,6 +67,10 @@ void backend_set_config_read_config(struct plugin_state *state,
 				    struct backend_shr_set_data **set_data);
 void backend_set_config_free_config(struct backend_shr_set_data *set_data);
 
+/* Warn if a just-populated set of entries is actually empty. */
+void backend_check_empty(struct plugin_state *state,
+			 const char *group, const char *set);
+
 /* Re-read any plugin configuration data which can be modified without
  * requiring a restart. */
 void backend_update_params(struct plugin_state *state);