175 lines
3.5 KiB
C
175 lines
3.5 KiB
C
/* $NetBSD: thrd.c,v 1.4 2019/09/10 22:34:19 kamil Exp $ */
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/*-
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* Copyright (c) 2016 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Kamil Rytarowski.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: thrd.c,v 1.4 2019/09/10 22:34:19 kamil Exp $");
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#include <assert.h>
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#include <errno.h>
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#include <pthread.h>
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#include <sched.h>
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#include <stdlib.h>
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#include <time.h>
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#include <threads.h>
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struct __thrd_tramp_data {
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thrd_start_t func;
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void *arg;
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};
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static void *
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__thrd_create_tramp(void *arg)
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{
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struct __thrd_tramp_data *cookie;
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int ret;
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_DIAGASSERT(arg != NULL);
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cookie = (struct __thrd_tramp_data *)arg;
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ret = (cookie->func)(cookie->arg);
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free(cookie);
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return (void *)(intptr_t)ret;
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}
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int
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thrd_create(thrd_t *thr, thrd_start_t func, void *arg)
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{
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struct __thrd_tramp_data *cookie;
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int error;
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_DIAGASSERT(thr != NULL);
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_DIAGASSERT(func != NULL);
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cookie = malloc(sizeof(*cookie));
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if (cookie == NULL)
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return thrd_nomem;
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cookie->func = func;
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cookie->arg = arg;
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switch(pthread_create(thr, NULL, __thrd_create_tramp, cookie)) {
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case 0:
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return thrd_success;
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case ENOMEM:
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error = thrd_nomem;
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break;
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default:
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error = thrd_error;
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}
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free(cookie);
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return error;
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}
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thrd_t
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thrd_current(void)
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{
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return pthread_self();
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}
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int
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thrd_detach(thrd_t thr)
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{
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_DIAGASSERT(thr != NULL);
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if (pthread_detach(thr) == 0)
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return thrd_success;
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return thrd_error;
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}
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int
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thrd_equal(thrd_t t1, thrd_t t2)
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{
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_DIAGASSERT(t1 != NULL);
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_DIAGASSERT(t2 != NULL);
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return pthread_equal(t1, t2);
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}
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__dead void
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thrd_exit(int res)
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{
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pthread_exit((void *)(intptr_t)res);
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}
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int
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thrd_join(thrd_t thrd, int *res)
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{
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void *ptr;
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_DIAGASSERT(thrd != NULL);
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if (pthread_join(thrd, &ptr) == 0) {
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if (res)
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*res = (int)(intptr_t)ptr;
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return thrd_success;
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}
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return thrd_error;
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}
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int
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thrd_sleep(const struct timespec *duration, struct timespec *remaining)
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{
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_DIAGASSERT(duration != NULL);
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/* Use clock_nanosleep(3) to skip handling errno */
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switch (clock_nanosleep(CLOCK_MONOTONIC, TIMER_RELTIME, duration,
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remaining)) {
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case 0:
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return 0;
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case EINTR:
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return -1;
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default:
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/* Negative value different than -1 */
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return -2;
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}
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}
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void
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thrd_yield(void)
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{
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sched_yield();
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}
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