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112 | 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 __ia64_ATOMIC_H__ |
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30 | #define __ia64_ATOMIC_H__ |
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31 | |||
475 | jermar | 32 | #include <arch/types.h> |
1104 | jermar | 33 | #include <typedefs.h> |
112 | jermar | 34 | |
35 | |||
627 | jermar | 36 | /** Atomic addition. |
37 | * |
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38 | * @param val Atomic value. |
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39 | * @param imm Value to add. |
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40 | * |
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1024 | jermar | 41 | * @return Value before addition. |
627 | jermar | 42 | */ |
1104 | jermar | 43 | static inline long atomic_add(atomic_t *val, int imm) |
475 | jermar | 44 | { |
1104 | jermar | 45 | long v; |
475 | jermar | 46 | |
625 | palkovsky | 47 | __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm)); |
477 | vana | 48 | |
475 | jermar | 49 | return v; |
112 | jermar | 50 | } |
51 | |||
477 | vana | 52 | static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
53 | static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } |
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475 | jermar | 54 | |
1104 | jermar | 55 | static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; } |
56 | static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; } |
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477 | vana | 57 | |
1104 | jermar | 58 | static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); } |
59 | static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); } |
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477 | vana | 60 | |
112 | jermar | 61 | #endif |