| 1,5 → 1,5 |
|---|
| /* |
| * Copyright (C) 2005 Martin Decky |
| * Copyright (C) 2005 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 26,45 → 26,74 |
|---|
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup libcsparc64 |
| /** @addtogroup libcsparc64 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #ifndef __sparc64_ATOMIC_H__ |
| #define __sparc64_ATOMIC_H__ |
| #ifndef LIBC_sparc64_ATOMIC_H_ |
| #define LIBC_sparc64_ATOMIC_H_ |
| |
| static inline void atomic_inc(atomic_t *val) |
| #include <types.h> |
| |
| /** Atomic add operation. |
| * |
| * Use atomic compare and swap operation to atomically add signed value. |
| * |
| * @param val Atomic variable. |
| * @param i Signed value to be added. |
| * |
| * @return Value of the atomic variable as it existed before addition. |
| */ |
| static inline long atomic_add(atomic_t *val, int i) |
| { |
| uint64_t a, b; |
| volatile uint64_t x = (uint64_t) &val->count; |
| |
| __asm__ volatile ( |
| "0:\n" |
| "ldx %0, %1\n" |
| "add %1, %3, %2\n" |
| "casx %0, %1, %2\n" |
| "cmp %1, %2\n" |
| "bne 0b\n" /* The operation failed and must be attempted again if a != b. */ |
| "nop\n" |
| : "=m" (*((uint64_t *)x)), "=r" (a), "=r" (b) |
| : "r" (i) |
| ); |
| |
| return a; |
| } |
| |
| static inline void atomic_dec(atomic_t *val) |
| static inline long atomic_preinc(atomic_t *val) |
| { |
| return atomic_add(val, 1) + 1; |
| } |
| |
| static inline long atomic_postinc(atomic_t *val) |
| { |
| atomic_inc(val); |
| return val->count - 1; |
| return atomic_add(val, 1); |
| } |
| |
| static inline long atomic_predec(atomic_t *val) |
| { |
| return atomic_add(val, -1) - 1; |
| } |
| |
| static inline long atomic_postdec(atomic_t *val) |
| { |
| atomic_dec(val); |
| return val->count + 1; |
| return atomic_add(val, -1); |
| } |
| |
| static inline long atomic_preinc(atomic_t *val) |
| static inline void atomic_inc(atomic_t *val) |
| { |
| atomic_inc(val); |
| return val->count; |
| (void) atomic_add(val, 1); |
| } |
| |
| static inline long atomic_predec(atomic_t *val) |
| static inline void atomic_dec(atomic_t *val) |
| { |
| atomic_dec(val); |
| return val->count; |
| (void) atomic_add(val, -1); |
| } |
| |
| #endif |