manage loops when freeing

[protos/libecoli.git] / lib / ecoli_node.h

diff --git a/lib/ecoli_node.h b/lib/ecoli_node.h
index 6fede59..9bf459d 100644 (file)
--- a/lib/ecoli_node.h
+++ b/lib/ecoli_node.h
@@ -132,6 +132,14 @@ const struct ec_node_type *ec_node_type_lookup(const char *name);
  */
 void ec_node_type_dump(FILE *out);
 
+enum ec_node_free_state {
+       EC_NODE_FREE_STATE_NONE,
+       EC_NODE_FREE_STATE_TRAVERSED,
+       EC_NODE_FREE_STATE_FREEABLE,
+       EC_NODE_FREE_STATE_NOT_FREEABLE,
+       EC_NODE_FREE_STATE_FREEING,
+};
+
 struct ec_node {
        const struct ec_node_type *type;
        struct ec_config *config;    /**< Generic configuration. */
@@ -139,6 +147,11 @@ struct ec_node {
        char *desc;
        struct ec_keyval *attrs;
        unsigned int refcnt;
+       struct {
+               enum ec_node_free_state state; /**< State of loop detection */
+               unsigned int refcnt;    /**< Number of reachable references
+                                        *   starting from node beeing freed */
+       } free; /**< Freeing state: used for loop detection */
 };
 
 /* create a new node when the type is known, typically called from the node