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/* $NetBSD: srcu.h,v 1.4 2021/12/19 11:49:11 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_SRCU_H_
#define _LINUX_SRCU_H_
#include <sys/types.h>
#include <sys/condvar.h>
#include <sys/mutex.h>
/* namespace */
#define _init_srcu_struct linux__init_init_srcu_struct
#define cleanup_srcu_struct linux_cleanup_srcu_struct
#define srcu_read_lock linux_srcu_read_lock
#define srcu_read_unlock linux_srcu_read_unlock
#define synchronize_srcu linux_synchronize_srcu
#define synchronize_srcu_expedited linux_synchronize_srcu_expedited
struct lwp;
struct percpu;
struct srcu_struct {
struct percpu *srcu_percpu; /* struct srcu_cpu */
kmutex_t srcu_lock;
kcondvar_t srcu_cv;
struct lwp *srcu_sync;
int64_t srcu_total;
volatile unsigned srcu_gen;
};
#define init_srcu_struct(S) _init_srcu_struct(S, #S)
void _init_srcu_struct(struct srcu_struct *, const char *);
void cleanup_srcu_struct(struct srcu_struct *);
int srcu_read_lock(struct srcu_struct *);
void srcu_read_unlock(struct srcu_struct *, int);
void synchronize_srcu(struct srcu_struct *);
void synchronize_srcu_expedited(struct srcu_struct *);
#endif /* _LINUX_SRCU_H_ */
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