1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
29#include <sys/cdefs.h>
30#include <pthread.h>
31#include <stdint.h>
32#include <stdlib.h>
33
34#include "threads.h"
35
36struct thrd_param {
37	thrd_start_t	 func;
38	void		*arg;
39};
40
41static void *
42thrd_entry(void *arg)
43{
44	struct thrd_param tp;
45
46	tp = *(struct thrd_param *)arg;
47	free(arg);
48	return ((void *)(intptr_t)tp.func(tp.arg));
49}
50
51int
52thrd_create(thrd_t *thr, thrd_start_t func, void *arg)
53{
54	struct thrd_param *tp;
55
56	/*
57	 * Work around return type inconsistency.  Wrap execution using
58	 * a function conforming to pthread_create()'s start_routine.
59	 */
60	tp = malloc(sizeof(*tp));
61	if (tp == NULL)
62		return (thrd_nomem);
63	tp->func = func;
64	tp->arg = arg;
65	if (pthread_create(thr, NULL, thrd_entry, tp) != 0) {
66		free(tp);
67		return (thrd_error);
68	}
69	return (thrd_success);
70}
71
72thrd_t
73thrd_current(void)
74{
75
76	return (pthread_self());
77}
78
79int
80thrd_detach(thrd_t thr)
81{
82
83	if (pthread_detach(thr) != 0)
84		return (thrd_error);
85	return (thrd_success);
86}
87
88int
89thrd_equal(thrd_t thr0, thrd_t thr1)
90{
91
92	return (pthread_equal(thr0, thr1));
93}
94
95_Noreturn void
96thrd_exit(int res)
97{
98
99	pthread_exit((void *)(intptr_t)res);
100}
101
102int
103thrd_join(thrd_t thr, int *res)
104{
105	void *value_ptr;
106
107	if (pthread_join(thr, &value_ptr) != 0)
108		return (thrd_error);
109	if (res != NULL)
110		*res = (intptr_t)value_ptr;
111	return (thrd_success);
112}
113
114int
115thrd_sleep(const struct timespec *duration, struct timespec *remaining)
116{
117
118	return (nanosleep(duration, remaining));
119}
120
121void
122thrd_yield(void)
123{
124
125	pthread_yield();
126}
127