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initial import from FreeBSD src commit 4d846d260e2b9a3d4d0a701462568268cbfe7a5b

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Matthieu Herrb 2023-08-13 19:42:59 +02:00
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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _THREADS_H_
#define _THREADS_H_
#include <time.h>
/*
* The C11 threads interface.
*
* This interface is implemented as a light-weight wrapper around
* <pthread.h>. To prevent namespace pollution, the once_flag object,
* its corresponding ONCE_FLAG_INIT and TSS_DTOR_ITERATIONS have been
* copied from this header file. They must be kept in sync.
*/
typedef struct pthread_cond *cnd_t;
typedef struct pthread_mutex *mtx_t;
typedef struct pthread *thrd_t;
typedef int tss_t;
typedef struct {
int __state;
mtx_t __mutex;
} once_flag;
typedef void (*tss_dtor_t)(void *);
typedef int (*thrd_start_t)(void *);
enum {
mtx_plain = 0x1,
mtx_recursive = 0x2,
mtx_timed = 0x4
};
enum {
thrd_busy = 1,
thrd_error = 2,
thrd_nomem = 3,
thrd_success = 4,
thrd_timedout = 5
};
#if !defined(__cplusplus) || __cplusplus < 201103L
#define thread_local _Thread_local
#endif
#define ONCE_FLAG_INIT { 0, NULL }
#define TSS_DTOR_ITERATIONS 4
__BEGIN_DECLS
void call_once(once_flag *, void (*)(void));
int cnd_broadcast(cnd_t *);
void cnd_destroy(cnd_t *);
int cnd_init(cnd_t *);
int cnd_signal(cnd_t *);
int cnd_timedwait(cnd_t *__restrict, mtx_t *__restrict __mtx,
const struct timespec *__restrict)
__requires_exclusive(*__mtx);
int cnd_wait(cnd_t *, mtx_t *__mtx)
__requires_exclusive(*__mtx);
void mtx_destroy(mtx_t *__mtx)
__requires_unlocked(*__mtx);
int mtx_init(mtx_t *__mtx, int)
__requires_unlocked(*__mtx);
int mtx_lock(mtx_t *__mtx)
__locks_exclusive(*__mtx);
int mtx_timedlock(mtx_t *__restrict __mtx,
const struct timespec *__restrict)
__trylocks_exclusive(thrd_success, *__mtx);
int mtx_trylock(mtx_t *__mtx)
__trylocks_exclusive(thrd_success, *__mtx);
int mtx_unlock(mtx_t *__mtx)
__unlocks(*__mtx);
int thrd_create(thrd_t *, thrd_start_t, void *);
thrd_t thrd_current(void);
int thrd_detach(thrd_t);
int thrd_equal(thrd_t, thrd_t);
_Noreturn void
thrd_exit(int);
int thrd_join(thrd_t, int *);
int thrd_sleep(const struct timespec *, struct timespec *);
void thrd_yield(void);
int tss_create(tss_t *, tss_dtor_t);
void tss_delete(tss_t);
void * tss_get(tss_t);
int tss_set(tss_t, void *);
__END_DECLS
#endif /* !_THREADS_H_ */