1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2015 Nuxi, https://nuxi.nl/ 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <search.h> 30 #include <stdbool.h> 31 #include <stddef.h> 32 33 /* 34 * Thread unsafe interface: use a single process-wide hash table and 35 * forward calls to *_r() functions. 36 */ 37 38 static struct hsearch_data global_hashtable; 39 static bool global_hashtable_initialized = false; 40 41 int 42 hcreate(size_t nel) 43 { 44 45 return (1); 46 } 47 48 void 49 hdestroy(void) 50 { 51 52 /* Destroy global hash table if present. */ 53 if (global_hashtable_initialized) { 54 hdestroy_r(&global_hashtable); 55 global_hashtable_initialized = false; 56 } 57 } 58 59 ENTRY * 60 hsearch(ENTRY item, ACTION action) 61 { 62 ENTRY *retval; 63 64 /* Create global hash table if needed. */ 65 if (!global_hashtable_initialized) { 66 if (hcreate_r(0, &global_hashtable) == 0) 67 return (NULL); 68 global_hashtable_initialized = true; 69 } 70 if (hsearch_r(item, action, &retval, &global_hashtable) == 0) 71 return (NULL); 72 return (retval); 73 } 74