/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
 * Copyright (c) 2022 Dominic Martinez <dom@dominicm.dev>
 * 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.
 *
 * $FreeBSD$
 */

#if __GNUC__ > 2 /* not available on gcc2 */

#ifndef _THREADS_H_
#define _THREADS_H_

#include <sys/types.h>
#include <time.h>

typedef pthread_cond_t cnd_t;
typedef pthread_mutex_t mtx_t;
typedef pthread_t thrd_t;
typedef pthread_key_t tss_t;
typedef pthread_once_t 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          { -1 }
#define TSS_DTOR_ITERATIONS     4

#ifdef __cplusplus
extern "C" {
#endif

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);
int     cnd_wait(cnd_t *, mtx_t *__mtx);
void mtx_destroy(mtx_t *__mtx);
int     mtx_init(mtx_t *__mtx, int);
int     mtx_lock(mtx_t *__mtx);
int     mtx_timedlock(mtx_t *__restrict __mtx,
    const struct timespec *__restrict);
int     mtx_trylock(mtx_t *__mtx);
int     mtx_unlock(mtx_t *__mtx);
int     thrd_create(thrd_t *thread, thrd_start_t, void *);
thrd_t  thrd_current(void);
int     thrd_detach(thrd_t);
int     thrd_equal(thrd_t, thrd_t);
void thrd_exit(int) __attribute__((noreturn));
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 *);

#ifdef __cplusplus
}
#endif

#endif /* _THREADS_H_ */

#endif /* __GNUC__ > 2 */