1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#include <errno.h>
32#include <pthread.h>
33
34#include "threads.h"
35
36void
37mtx_destroy(mtx_t *mtx)
38{
39
40	(void)pthread_mutex_destroy(mtx);
41}
42
43int
44mtx_init(mtx_t *mtx, int type)
45{
46	pthread_mutexattr_t attr;
47	int mt;
48
49	switch (type) {
50	case mtx_plain:
51	case mtx_timed:
52		mt = PTHREAD_MUTEX_NORMAL;
53		break;
54	case mtx_plain | mtx_recursive:
55	case mtx_timed | mtx_recursive:
56		mt = PTHREAD_MUTEX_RECURSIVE;
57		break;
58	default:
59		return (thrd_error);
60	}
61
62	if (pthread_mutexattr_init(&attr) != 0)
63		return (thrd_error);
64	if (pthread_mutexattr_settype(&attr, mt) != 0)
65		return (thrd_error);
66	if (pthread_mutex_init(mtx, &attr) != 0)
67		return (thrd_error);
68	return (thrd_success);
69}
70
71int
72mtx_lock(mtx_t *mtx)
73{
74
75	if (pthread_mutex_lock(mtx) != 0)
76		return (thrd_error);
77	return (thrd_success);
78}
79
80int
81mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts)
82{
83
84	switch (pthread_mutex_timedlock(mtx, ts)) {
85	case 0:
86		return (thrd_success);
87	case ETIMEDOUT:
88		return (thrd_timedout);
89	default:
90		return (thrd_error);
91	}
92}
93
94int
95mtx_trylock(mtx_t *mtx)
96{
97
98	switch (pthread_mutex_trylock(mtx)) {
99	case 0:
100		return (thrd_success);
101	case EBUSY:
102		return (thrd_busy);
103	default:
104		return (thrd_error);
105	}
106}
107
108int
109mtx_unlock(mtx_t *mtx)
110{
111
112	if (pthread_mutex_unlock(mtx) != 0)
113		return (thrd_error);
114	return (thrd_success);
115}
116