| 0,0 → 1,96 |
|---|
| /* |
| * Copyright (C) 2006 Martin Decky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup libcppc64 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #ifndef __ppc64_ATOMIC_H__ |
| #define __ppc64_ATOMIC_H__ |
| |
| static inline void atomic_inc(atomic_t *val) |
| { |
| long tmp; |
| |
| asm __volatile__ ( |
| "1:\n" |
| "lwarx %0, 0, %2\n" |
| "addic %0, %0, 1\n" |
| "stwcx. %0, 0, %2\n" |
| "bne- 1b" |
| : "=&r" (tmp), "=m" (val->count) |
| : "r" (&val->count), "m" (val->count) |
| : "cc"); |
| } |
| |
| static inline void atomic_dec(atomic_t *val) |
| { |
| long tmp; |
| |
| asm __volatile__( |
| "1:\n" |
| "lwarx %0, 0, %2\n" |
| "addic %0, %0, -1\n" |
| "stwcx. %0, 0, %2\n" |
| "bne- 1b" |
| : "=&r" (tmp), "=m" (val->count) |
| : "r" (&val->count), "m" (val->count) |
| : "cc"); |
| } |
| |
| static inline long atomic_postinc(atomic_t *val) |
| { |
| atomic_inc(val); |
| return val->count - 1; |
| } |
| |
| static inline long atomic_postdec(atomic_t *val) |
| { |
| atomic_dec(val); |
| return val->count + 1; |
| } |
| |
| static inline long atomic_preinc(atomic_t *val) |
| { |
| atomic_inc(val); |
| return val->count; |
| } |
| |
| static inline long atomic_predec(atomic_t *val) |
| { |
| atomic_dec(val); |
| return val->count; |
| } |
| |
| #endif |
| |
| /** @} |
| */ |
| |