source: rtems/cpukit/libstdthreads/thrd.c @ a5f84c6a

Last change on this file since a5f84c6a was cff773f, checked in by Sebastian Huber <sebastian.huber@…>, on Sep 10, 2015 at 3:12:06 PM

libstdthreads: Add C11 threads

  • Property mode set to 100644
File size: 2.8 KB
Line 
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 * $FreeBSD r279318 2015-02-26T09:42:03Z$
27 */
28
29#include <threads.h>
30#include <pthread.h>
31#include <sched.h>
32#include <stdint.h>
33#include <stdlib.h>
34
35struct thrd_param {
36        thrd_start_t     func;
37        void            *arg;
38};
39
40static void *
41thrd_entry(void *arg)
42{
43        struct thrd_param tp;
44
45        tp = *(struct thrd_param *)arg;
46        free(arg);
47        return ((void *)(intptr_t)tp.func(tp.arg));
48}
49
50int
51thrd_create(thrd_t *thr, thrd_start_t func, void *arg)
52{
53        struct thrd_param *tp;
54
55        /*
56         * Work around return type inconsistency.  Wrap execution using
57         * a function conforming to pthread_create()'s start_routine.
58         */
59        tp = malloc(sizeof(*tp));
60        if (tp == NULL)
61                return (thrd_nomem);
62        tp->func = func;
63        tp->arg = arg;
64        if (pthread_create(thr, NULL, thrd_entry, tp) != 0) {
65                free(tp);
66                return (thrd_error);
67        }
68        return (thrd_success);
69}
70
71thrd_t
72thrd_current(void)
73{
74
75        return (pthread_self());
76}
77
78int
79thrd_detach(thrd_t thr)
80{
81
82        if (pthread_detach(thr) != 0)
83                return (thrd_error);
84        return (thrd_success);
85}
86
87int
88thrd_equal(thrd_t thr0, thrd_t thr1)
89{
90
91        return (pthread_equal(thr0, thr1));
92}
93
94_Noreturn void
95thrd_exit(int res)
96{
97
98        pthread_exit((void *)(intptr_t)res);
99}
100
101int
102thrd_join(thrd_t thr, int *res)
103{
104        void *value_ptr;
105
106        if (pthread_join(thr, &value_ptr) != 0)
107                return (thrd_error);
108        if (res != NULL)
109                *res = (intptr_t)value_ptr;
110        return (thrd_success);
111}
112
113int
114thrd_sleep(const struct timespec *duration, struct timespec *remaining)
115{
116
117        return (nanosleep(duration, remaining));
118}
119
120void
121thrd_yield(void)
122{
123
124        sched_yield();
125}
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