1 /*-
2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD: head/lib/libc/stdlib/hcreate.c 292767 2015-12-27 07:50:11Z ed $");
28
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
hcreate(size_t nel)42 hcreate(size_t nel)
43 {
44
45 return (1);
46 }
47
48 void
hdestroy(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 *
hsearch(ENTRY item,ACTION action)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