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2260 hudecek 1
/*
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 * Copyright (c) 2007 Jan Hudecek
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 * Copyright (c) 2006 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup sync
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 * @{
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 */
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/** @file
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 */
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#ifndef KERN_RCU_H_
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#define KERN_RCU_H_
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#include <arch/types.h>
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#include <ddi/tasklet.h>
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#include <arch/barrier.h>
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#include <preemption.h>
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/** Read lock for RCU protected pointer */
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#define rcu_read_lock preemption_disable()
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/** Release of read lock for RCU protected pointer */
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#define rcu_read_unlock preemption_enable()
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/** Dereferencing of an RCU protected pointer */
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#define rcu_dereference_pointer(p) (*(p))
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/** Assigning a value to an RCU protected pointer */
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#define rcu_assign_pointer(p, newp) {write_barrier(); (p)=(newp)}
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void rcu_init(void);
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void rcu_synchronize(void);
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void rcu_synchronize_callback_function(void* waitq);
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void rcu_sync_callback(void (*func)(void* data), void* data);
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#endif