Rev 1113 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1110 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 1656 | cejka | 29 | /** @addtogroup libcamd64 amd64 |
| 30 | * @ingroup lc |
||
| 31 | * @brief amd64 architecture dependent parts of libc |
||
| 32 | * @{ |
||
| 33 | */ |
||
| 34 | /** @file |
||
| 35 | */ |
||
| 36 | |||
| 1110 | jermar | 37 | #ifndef __amd64_ATOMIC_H__ |
| 38 | #define __amd64_ATOMIC_H__ |
||
| 39 | |||
| 40 | static inline void atomic_inc(atomic_t *val) { |
||
| 41 | __asm__ volatile ("lock incq %0\n" : "=m" (val->count)); |
||
| 42 | } |
||
| 43 | |||
| 44 | static inline void atomic_dec(atomic_t *val) { |
||
| 45 | __asm__ volatile ("lock decq %0\n" : "=m" (val->count)); |
||
| 46 | } |
||
| 47 | |||
| 48 | static inline long atomic_postinc(atomic_t *val) |
||
| 49 | { |
||
| 50 | long r; |
||
| 51 | |||
| 52 | __asm__ volatile ( |
||
| 53 | "movq $1, %0\n" |
||
| 54 | "lock xaddq %0, %1\n" |
||
| 55 | : "=r" (r), "=m" (val->count) |
||
| 56 | ); |
||
| 57 | |||
| 58 | return r; |
||
| 59 | } |
||
| 60 | |||
| 61 | static inline long atomic_postdec(atomic_t *val) |
||
| 62 | { |
||
| 63 | long r; |
||
| 64 | |||
| 65 | __asm__ volatile ( |
||
| 66 | "movq $-1, %0\n" |
||
| 67 | "lock xaddq %0, %1\n" |
||
| 68 | : "=r" (r), "=m" (val->count) |
||
| 69 | ); |
||
| 70 | |||
| 71 | return r; |
||
| 72 | } |
||
| 73 | |||
| 74 | #define atomic_preinc(val) (atomic_postinc(val)+1) |
||
| 75 | #define atomic_predec(val) (atomic_postdec(val)-1) |
||
| 76 | |||
| 77 | #endif |
||
| 1656 | cejka | 78 | |
| 79 | |||
| 80 | /** @} |
||
| 81 | */ |
||
| 82 | |||
| 83 |