/*      $NetBSD: atomic_load.c,v 1.5 2024/02/14 18:00:02 christos Exp $ */

/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
* 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 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: atomic_load.c,v 1.5 2024/02/14 18:00:02 christos Exp $");

#include "atomic_op_namespace.h"

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

#define atomic_load_n(n,b) \
uint ## b ## _t __atomic_load_ ## n(const volatile void *, int); \
/*ARGSUSED*/ \
uint ## b ## _t \
__atomic_load_ ## n(const volatile void *ptr, int memmodel __unused) \
{ \
       uint## b ##_t val; \
       val = *(const volatile uint ## b ## _t *)ptr; \
       membar_acquire(); \
       return val; \
}

atomic_load_n(1, 8)
atomic_load_n(2, 16)
atomic_load_n(4, 32)
#ifdef  __HAVE_ATOMIC_CAS_64_UP
atomic_load_n(8, 64)
#endif