Current File : //backups/router/usr/include/sys/membarrier.h
/*-
* Copyright (c) 2021 The FreeBSD Foundation
*
* This software were developed by Konstantin Belousov <kib@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* 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.
*/
#ifndef __SYS_MEMBARRIER_H__
#define __SYS_MEMBARRIER_H__
#include <sys/cdefs.h>
/*
* The enum membarrier_cmd values are bits. The MEMBARRIER_CMD_QUERY
* command returns a bitset indicating which commands are supported.
* Also the value of MEMBARRIER_CMD_QUERY is zero, so it is
* effectively not returned by the query.
*/
enum membarrier_cmd {
MEMBARRIER_CMD_QUERY = 0x00000000,
MEMBARRIER_CMD_GLOBAL = 0x00000001,
MEMBARRIER_CMD_SHARED = MEMBARRIER_CMD_GLOBAL,
MEMBARRIER_CMD_GLOBAL_EXPEDITED = 0x00000002,
MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED = 0x00000004,
MEMBARRIER_CMD_PRIVATE_EXPEDITED = 0x00000008,
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED = 0x00000010,
MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE = 0x00000020,
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE = 0x00000040,
/*
* RSEQ constants are defined for source compatibility but are
* not yet supported, MEMBARRIER_CMD_QUERY does not return
* them in the mask.
*/
MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ = 0x00000080,
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ = 0x00000100,
};
enum membarrier_cmd_flag {
MEMBARRIER_CMD_FLAG_CPU = 0x00000001,
};
#ifndef _KERNEL
__BEGIN_DECLS
int membarrier(int, unsigned, int);
__END_DECLS
#endif /* _KERNEL */
#endif /* __SYS_MEMBARRIER_H__ */
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