- add some callback data to map definitions

1 files changed, 16 insertions, 1 deletions

diff --git a/src/map.c b/src/map.c
index 0caf00c..10be1be 100644
--- a/src/map.c
+++ b/src/map.c
@@ -33,6 +33,8 @@ struct {
 				char *value;
 				unsigned int value_len;
 			} *entries;
+			void *backend_data;
+			void (*free_backend_data)(void *backend_data);
 		} *maps;
 		int n_maps;
 	} *domains;
@@ -276,6 +278,9 @@ map_data_unset_map(struct plugin_state *state,
 			map = &domain->maps[i];
 			/* Free the contents. */
 			free(map->name);
+			if (map->free_backend_data != NULL) {
+				map->free_backend_data(map->backend_data);
+			}
 			map_data_clear_map_map(state, map);
 			/* Close the hole in the array. */
 			domain->n_maps--;
@@ -314,7 +319,9 @@ map_data_unset_map(struct plugin_state *state,
 void
 map_data_set_map(struct plugin_state *state,
 		 const char *domain_name,
-		 const char *map_name)
+		 const char *map_name,
+		 void *backend_data,
+		 void (*free_backend_data)(void *backend_data))
 {
 	struct domain *domain, *domains;
 	struct map *map, *maps;
@@ -368,6 +375,8 @@ map_data_set_map(struct plugin_state *state,
 			map = &maps[domain->n_maps];
 			memset(map, 0, sizeof(*map));
 			map->name = strdup(map_name);
+			map->backend_data = backend_data;
+			map->free_backend_data = free_backend_data;
 			if (map->name != NULL) {
 				/* Copy in existing data. */
 				memcpy(maps, domain->maps,
@@ -382,6 +391,12 @@ map_data_set_map(struct plugin_state *state,
 				return;
 			}
 		}
+	} else {
+		if (map->free_backend_data != NULL) {
+			map->free_backend_data(map->backend_data);
+		}
+		map->backend_data = backend_data;
+		map->free_backend_data = free_backend_data;
 	}
 }