NetBSD/lib/libpthread/tss.c

/*	$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;
}