| 0,0 → 1,67 |
|---|
| /* |
| * Copyright (C) 2005 Ondrej Palkovsky |
| * 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. |
| */ |
| |
| #ifndef __mips32_ATOMIC_H__ |
| #define __mips32_ATOMIC_H__ |
| |
| #define atomic_inc(x) ((void) atomic_add(x, 1)) |
| #define atomic_dec(x) ((void) atomic_add(x, -1)) |
| |
| #define atomic_postinc(x) (atomic_add(x, 1) - 1) |
| #define atomic_postdec(x) (atomic_add(x, -1) + 1) |
| |
| #define atomic_preinc(x) atomic_add(x, 1) |
| #define atomic_predec(x) atomic_add(x, -1) |
| |
| /* Atomic addition of immediate value. |
| * |
| * @param val Memory location to which will be the immediate value added. |
| * @param i Signed immediate that will be added to *val. |
| * |
| * @return Value after addition. |
| */ |
| static inline long atomic_add(atomic_t *val, int i) |
| { |
| long tmp, v; |
| |
| __asm__ volatile ( |
| "1:\n" |
| " ll %0, %1\n" |
| " addiu %0, %0, %3\n" /* same as addi, but never traps on overflow */ |
| " move %2, %0\n" |
| " sc %0, %1\n" |
| " beq %0, %4, 1b\n" /* if the atomic operation failed, try again */ |
| /* nop */ /* nop is inserted automatically by compiler */ |
| : "=r" (tmp), "=m" (val->count), "=r" (v) |
| : "i" (i), "i" (0) |
| ); |
| |
| return v; |
| } |
| |
| #endif |