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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define _SEARCH_PRIVATE
     18 #include <search.h>
     19 #include <stdlib.h>
     20 
     21 // Destroy a tree and free all allocated resources.
     22 // This is a GNU extension, not available from BSD.
     23 void tdestroy(void* root, void (*destroy_func)(void*)) {
     24   node_t* root_node = (node_t*) root;
     25   if (root_node == NULL) {
     26     return;
     27   }
     28   if (root_node->llink) {
     29     tdestroy(root_node->llink, destroy_func);
     30   }
     31   if (root_node->rlink) {
     32     tdestroy(root_node->rlink, destroy_func);
     33   }
     34   (*destroy_func)(root_node->key);
     35   free(root);
     36 }
     37