1/*-
2 * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <errno.h>
33#include <pthread.h>
34
35#include "threads.h"
36
37void
38mtx_destroy(mtx_t *mtx)
39{
40
41	(void)pthread_mutex_destroy(mtx);
42}
43
44int
45mtx_init(mtx_t *mtx, int type)
46{
47	pthread_mutexattr_t attr;
48	int mt;
49
50	switch (type) {
51	case mtx_plain:
52	case mtx_timed:
53		mt = PTHREAD_MUTEX_NORMAL;
54		break;
55	case mtx_plain | mtx_recursive:
56	case mtx_timed | mtx_recursive:
57		mt = PTHREAD_MUTEX_RECURSIVE;
58		break;
59	default:
60		return (thrd_error);
61	}
62
63	if (pthread_mutexattr_init(&attr) != 0)
64		return (thrd_error);
65	if (pthread_mutexattr_settype(&attr, mt) != 0)
66		return (thrd_error);
67	if (pthread_mutex_init(mtx, &attr) != 0)
68		return (thrd_error);
69	return (thrd_success);
70}
71
72int
73mtx_lock(mtx_t *mtx)
74{
75
76	if (pthread_mutex_lock(mtx) != 0)
77		return (thrd_error);
78	return (thrd_success);
79}
80
81int
82mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts)
83{
84
85	switch (pthread_mutex_timedlock(mtx, ts)) {
86	case 0:
87		return (thrd_success);
88	case ETIMEDOUT:
89		return (thrd_timedout);
90	default:
91		return (thrd_error);
92	}
93}
94
95int
96mtx_trylock(mtx_t *mtx)
97{
98
99	switch (pthread_mutex_lock(mtx)) {
100	case 0:
101		return (thrd_success);
102	case EBUSY:
103		return (thrd_busy);
104	default:
105		return (thrd_error);
106	}
107}
108
109int
110mtx_unlock(mtx_t *mtx)
111{
112
113	if (pthread_mutex_unlock(mtx) != 0)
114		return (thrd_error);
115	return (thrd_success);
116}
117