/*      $NetBSD: tss.c,v 1.2 2019/12/15 22:32:29 uwe Exp $      */

/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Kamil Rytarowski.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: tss.c,v 1.2 2019/12/15 22:32:29 uwe Exp $");

#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <threads.h>

int
tss_create(tss_t *key, tss_dtor_t dtor)
{

       _DIAGASSERT(key != NULL);

       if (pthread_key_create(key, dtor) == 0)
               return thrd_success;

       return thrd_error;
}

void
tss_delete(tss_t key)
{

       /*
        * The tss_delete(3) function that conforms to C11 returns no value.
        */
       (void)pthread_key_delete(key);
}

void *
tss_get(tss_t key)
{

       return pthread_getspecific(key);
}

int
tss_set(tss_t key, void *val)
{

       if (pthread_setspecific(key, val) == 0)
               return thrd_success;

       return thrd_error;
}