1/*	$NetBSD: cnd.c,v 1.1 2019/04/24 11:43:19 kamil Exp $	*/
2
3/*-
4 * Copyright (c) 2016 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Kamil Rytarowski.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__RCSID("$NetBSD: cnd.c,v 1.1 2019/04/24 11:43:19 kamil Exp $");
34
35#include <assert.h>
36#include <errno.h>
37#include <pthread.h>
38#include <threads.h>
39
40int
41cnd_broadcast(cnd_t *cond)
42{
43
44	_DIAGASSERT(cond != NULL);
45
46	if (pthread_cond_broadcast(cond) == 0)
47		return thrd_success;
48
49	return thrd_error;
50}
51
52void
53cnd_destroy(cnd_t *cond)
54{
55
56	_DIAGASSERT(cond != NULL);
57
58	/*
59	 * The cnd_destroy(3) function that conforms to C11 returns no value.
60	 */
61	(void)pthread_cond_destroy(cond);
62}
63
64int
65cnd_init(cnd_t *cond)
66{
67
68	_DIAGASSERT(cond != NULL);
69
70	if (pthread_cond_init(cond, NULL) == 0)
71		return thrd_success;
72
73	return thrd_error;
74}
75
76int
77cnd_signal(cnd_t *cond)
78{
79
80	_DIAGASSERT(cond != NULL);
81
82	if (pthread_cond_signal(cond) == 0)
83		return thrd_success;
84
85	return thrd_error;
86}
87
88int
89cnd_timedwait(cnd_t * __restrict cond, mtx_t * __restrict mtx,
90            const struct timespec * __restrict ts)
91{
92
93	_DIAGASSERT(cond != NULL);
94	_DIAGASSERT(mtx != NULL);
95	_DIAGASSERT(ts != NULL);
96
97	switch (pthread_cond_timedwait(cond, mtx, ts)) {
98	case 0:
99		return thrd_success;
100	case ETIMEDOUT:
101		return thrd_timedout;
102	default:
103		return thrd_error;
104	}
105}
106
107int
108cnd_wait(cnd_t *cond, mtx_t *mtx)
109{
110
111	_DIAGASSERT(cond != NULL);
112	_DIAGASSERT(mtx != NULL);
113
114	if (pthread_cond_wait(cond, mtx) == 0)
115		return thrd_success;
116
117	return thrd_error;
118}
119