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 #include <search.h> 18 #include <stdlib.h> 19 20 struct node_t { 21 char* key; 22 struct node* llink; 23 struct node* rlink; 24 }; 25 26 // Destroy a tree and free all allocated resources. 27 // This is a GNU extension, not available from BSD. 28 void tdestroy(void* root, void (*destroy_func)(void*)) { 29 node_t* root_node = reinterpret_cast<node_t*>(root); 30 if (root_node == NULL) { 31 return; 32 } 33 if (root_node->llink) { 34 tdestroy(root_node->llink, destroy_func); 35 } 36 if (root_node->rlink) { 37 tdestroy(root_node->rlink, destroy_func); 38 } 39 (*destroy_func)(root_node->key); 40 free(root); 41 } 42
