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| Rev | Author | Line No. | Line |
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| 418 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __sparc64_ATOMIC_H__ |
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| 30 | #define __sparc64_ATOMIC_H__ |
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| 31 | |||
| 475 | jermar | 32 | #include <arch/types.h> |
| 33 | |||
| 625 | palkovsky | 34 | typedef struct { volatile __u64 count; } atomic_t; |
| 475 | jermar | 35 | |
| 418 | jermar | 36 | /* |
| 37 | * TODO: these are just placeholders for real implementations of atomic_inc and atomic_dec. |
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| 38 | * WARNING: the following functions cause the code to be preemption-unsafe !!! |
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| 39 | */ |
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| 40 | |||
| 627 | jermar | 41 | static inline void atomic_inc(atomic_t *val) |
| 42 | { |
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| 625 | palkovsky | 43 | val->count++; |
| 418 | jermar | 44 | } |
| 45 | |||
| 627 | jermar | 46 | static inline void atomic_dec(atomic_t *val) |
| 47 | { |
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| 625 | palkovsky | 48 | val->count--; |
| 418 | jermar | 49 | } |
| 50 | |||
| 627 | jermar | 51 | static inline void atomic_set(atomic_t *val, __u64 i) |
| 52 | { |
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| 53 | val->count = i; |
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| 54 | } |
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| 55 | |||
| 56 | static inline __u64 atomic_get(atomic_t *val) |
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| 57 | { |
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| 58 | return val->count; |
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| 59 | } |
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| 60 | |||
| 418 | jermar | 61 | #endif |