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/* $NetBSD: compiler.h,v 1.9 2022/07/17 08:34:00 riastradh Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Taylor R. Campbell.
*
* 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.
*/
#ifndef _LINUX_COMPILER_H_
#define _LINUX_COMPILER_H_
#include <sys/atomic.h>
#include <sys/cdefs.h>
#include <linux/stddef.h>
#include <asm/barrier.h>
#define __printf __printflike
#define __user
#if __GNUC_PREREQ__(4,0) /* not sure when but this will work */
#define __must_check __attribute__((warn_unused_result))
#else
#define __must_check /* nothing */
#endif
#define __always_unused __unused
#define __maybe_unused __unused
#define noinline __noinline
#define __deprecated /* nothing */
#define __acquire(X) /* nothing */
#define __release(X) /* nothing */
#define barrier() __insn_barrier()
#define likely(X) __predict_true(X)
#define unlikely(X) __predict_false(X)
#define __same_type(X,Y) \
__builtin_types_compatible_p(__typeof__(X), __typeof__(Y))
#define __must_be_array(X) \
BUILD_BUG_ON_ZERO(__same_type((X), &(X)[0]))
#define READ_ONCE(X) ({ \
__insn_barrier(); \
typeof(X) __read_once_tmp = (X); \
membar_datadep_consumer(); \
__read_once_tmp; \
})
#define WRITE_ONCE(X, V) ({ \
typeof(X) __write_once_tmp = (V); \
__insn_barrier(); \
(X) = __write_once_tmp; \
__insn_barrier(); \
__write_once_tmp; \
})
#define smp_store_mb(X, V) do { \
WRITE_ONCE(X, V); \
smp_mb(); \
} while (0)
#define smp_store_release(X, V) do { \
typeof(X) __smp_store_release_tmp = (V); \
membar_release(); \
(X) = __write_once_tmp; \
} while (0)
#endif /* _LINUX_COMPILER_H_ */
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