| 1,5 → 1,5 |
|---|
| /* |
| * Copyright (c) 2005 Jakub Jermar |
| * Copyright (c) 2007 Michal Kebrt |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 38,14 → 38,30 |
|---|
| /** Atomic addition. |
| * |
| * @param val Atomic value. |
| * @param imm Value to add. |
| * @param i Value to add. |
| * |
| * @return Value after addition. |
| */ |
| static inline long atomic_add(atomic_t *val, int imm) |
| static inline long atomic_add(atomic_t *val, int i) |
| { |
| /* TODO */ |
| return (val->count += imm); |
| int ret; |
| volatile long * mem = &(val->count); |
| |
| asm volatile ( |
| "1: \n" |
| "ldr r2, [%1] \n" |
| "add r3, r2, %2 \n" |
| "str r3, %0 \n" |
| "swp r3, r3, [%1] \n" |
| "cmp r3, r2 \n" |
| "bne 1b \n" |
| |
| : "=m" (ret) |
| : "r" (mem), "r" (i) |
| : "r3", "r2" |
| ); |
| |
| return ret; |
| } |
| |
| static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |