/*
* Copyright (c) 2007 Jan Hudecek
* Copyright (c) 2006 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/** @addtogroup sync
* @{
*/
/** @file
*/
#ifndef KERN_RCU_H_
#define KERN_RCU_H_
#include <arch/types.h>
#include <proc/tasklet.h>
#include <arch/barrier.h>
#include <preemption.h>
/** Read lock for RCU protected pointer */
#define rcu_read_lock preemption_disable()
/** Release of read lock for RCU protected pointer */
#define rcu_read_unlock preemption_enable()
/** Dereferencing of an RCU protected pointer */
#define rcu_dereference_pointer(p) (*(p))
/** Assigning a value to an RCU protected pointer */
#define rcu_assign_pointer(p, newp) {write_barrier(); (p)=(newp)}
void rcu_init(void);
void rcu_synchronize(void);
void rcu_synchronize_callback_function(void* waitq);
void rcu_sync_callback(void (*func)(void* data), void* data);
#endif