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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2260 | hudecek | 1 | /* |
| 2 | * Copyright (c) 2007 Jan Hudecek |
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| 3 | * Copyright (c) 2006 Jakub Jermar |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * |
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| 10 | * - Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * - Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * - The name of the author may not be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | */ |
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| 29 | /** @addtogroup sync |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 35 | #ifndef KERN_RCU_H_ |
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| 36 | #define KERN_RCU_H_ |
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| 37 | |||
| 38 | #include <arch/types.h> |
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| 39 | #include <ddi/tasklet.h> |
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| 40 | #include <arch/barrier.h> |
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| 41 | #include <preemption.h> |
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| 42 | |||
| 43 | |||
| 44 | /** Read lock for RCU protected pointer */ |
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| 45 | #define rcu_read_lock preemption_disable() |
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| 46 | |||
| 47 | /** Release of read lock for RCU protected pointer */ |
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| 48 | #define rcu_read_unlock preemption_enable() |
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| 49 | |||
| 50 | /** Dereferencing of an RCU protected pointer */ |
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| 51 | #define rcu_dereference_pointer(p) (*(p)) |
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| 52 | |||
| 53 | /** Assigning a value to an RCU protected pointer */ |
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| 54 | #define rcu_assign_pointer(p, newp) {write_barrier(); (p)=(newp)} |
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| 55 | |||
| 56 | void rcu_init(void); |
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| 57 | void rcu_synchronize(void); |
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| 58 | void rcu_synchronize_callback_function(void* waitq); |
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| 59 | void rcu_sync_callback(void (*func)(void* data), void* data); |
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| 60 | |||
| 61 | #endif |