// ---------------------------
// traversing
-void avl_walker(avl *node, void (*callback)(void *entry, void *data), void *data) {
- if(node->avl_link[0])
- avl_walker(node->avl_link[0], callback, data);
+int avl_walker(avl *node, int (*callback)(void *entry, void *data), void *data) {
+ int total = 0, ret = 0;
- callback(node, data);
+ if(node->avl_link[0]) {
+ ret = avl_walker(node->avl_link[0], callback, data);
+ if(ret < 0) return ret;
+ total += ret;
+ }
+
+ ret = callback(node, data);
+ if(ret < 0) return ret;
+ total += ret;
- if(node->avl_link[1])
- avl_walker(node->avl_link[1], callback, data);
+ if(node->avl_link[1]) {
+ ret = avl_walker(node->avl_link[1], callback, data);
+ if (ret < 0) return ret;
+ total += ret;
+ }
+
+ return total;
}
-void avl_traverse(avl_tree *t, void (*callback)(void *entry, void *data), void *data) {
- avl_walker(t->root, callback, data);
+int avl_traverse(avl_tree *t, int (*callback)(void *entry, void *data), void *data) {
+ return avl_walker(t->root, callback, data);
}
// ---------------------------
return ret;
}
-void avl_traverse_lock(avl_tree_lock *t, void (*callback)(void *entry, void *data), void *data) {
+int avl_traverse_lock(avl_tree_lock *t, int (*callback)(void *entry, void *data), void *data) {
+ int ret;
avl_read_lock(t);
- avl_traverse(&t->avl_tree, callback, data);
+ ret = avl_traverse(&t->avl_tree, callback, data);
avl_unlock(t);
+ return ret;
}
void avl_init(avl_tree *t, int (*compar)(void *a, void *b)) {