projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f5e706ad SR |
1 | /* atomic.h: These still suck, but the I-cache hit rate is higher. |
| 2 | * | |
| 3 | * Copyright (C) 1996 David S. Miller (davem@davemloft.net) | |
| 4 | * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au) | |
| 5 | * Copyright (C) 2007 Kyle McMartin (kyle@parisc-linux.org) | |
| 6 | * | |
| 7 | * Additions by Keith M Wesolowski (wesolows@foobazco.org) based | |
| 8 | * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef __ARCH_SPARC_ATOMIC__ | |
| 12 | #define __ARCH_SPARC_ATOMIC__ | |
| 13 | ||
| 14 | #include <linux/types.h> | |
| 15 | ||
| d550bbd4 | 16 | #include <asm/cmpxchg.h> |
| 56d36489 | 17 | #include <asm/barrier.h> |
| aea1181b SR |
18 | #include <asm-generic/atomic64.h> |
| 19 | ||
| f5e706ad SR |
20 | #define ATOMIC_INIT(i) { (i) } |
| 21 | ||
| 4f3316c2 | 22 | int atomic_add_return(int, atomic_t *); |
| 3a1adb23 PZ |
23 | int atomic_fetch_add(int, atomic_t *); |
| 24 | int atomic_fetch_and(int, atomic_t *); | |
| 25 | int atomic_fetch_or(int, atomic_t *); | |
| 26 | int atomic_fetch_xor(int, atomic_t *); | |
| f05a6865 | 27 | int atomic_cmpxchg(atomic_t *, int, int); |
| 1a17fdc4 | 28 | int atomic_xchg(atomic_t *, int); |
| f05a6865 SR |
29 | int __atomic_add_unless(atomic_t *, int, int); |
| 30 | void atomic_set(atomic_t *, int); | |
| f5e706ad | 31 | |
| 2291059c | 32 | #define atomic_read(v) ACCESS_ONCE((v)->counter) |
| f5e706ad | 33 | |
| 4f3316c2 PZ |
34 | #define atomic_add(i, v) ((void)atomic_add_return( (int)(i), (v))) |
| 35 | #define atomic_sub(i, v) ((void)atomic_add_return(-(int)(i), (v))) | |
| 36 | #define atomic_inc(v) ((void)atomic_add_return( 1, (v))) | |
| 37 | #define atomic_dec(v) ((void)atomic_add_return( -1, (v))) | |
| f5e706ad | 38 | |
| 3a1adb23 PZ |
39 | #define atomic_and(i, v) ((void)atomic_fetch_and((i), (v))) |
| 40 | #define atomic_or(i, v) ((void)atomic_fetch_or((i), (v))) | |
| 41 | #define atomic_xor(i, v) ((void)atomic_fetch_xor((i), (v))) | |
| 42 | ||
| 4f3316c2 | 43 | #define atomic_sub_return(i, v) (atomic_add_return(-(int)(i), (v))) |
| 3a1adb23 PZ |
44 | #define atomic_fetch_sub(i, v) (atomic_fetch_add (-(int)(i), (v))) |
| 45 | ||
| 4f3316c2 PZ |
46 | #define atomic_inc_return(v) (atomic_add_return( 1, (v))) |
| 47 | #define atomic_dec_return(v) (atomic_add_return( -1, (v))) | |
| f5e706ad SR |
48 | |
| 49 | #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) | |
| 50 | ||
| 51 | /* | |
| 52 | * atomic_inc_and_test - increment and test | |
| 53 | * @v: pointer of type atomic_t | |
| 54 | * | |
| 55 | * Atomically increments @v by 1 | |
| 56 | * and returns true if the result is zero, or false for all | |
| 57 | * other cases. | |
| 58 | */ | |
| 59 | #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) | |
| 60 | ||
| 61 | #define atomic_dec_and_test(v) (atomic_dec_return(v) == 0) | |
| 62 | #define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0) | |
| 63 | ||
| f5e706ad | 64 | #endif /* !(__ARCH_SPARC_ATOMIC__) */ |