diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/atomic.h')
-rw-r--r-- | ANDROID_3.4.5/include/linux/atomic.h | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/ANDROID_3.4.5/include/linux/atomic.h b/ANDROID_3.4.5/include/linux/atomic.h deleted file mode 100644 index 70cfcb2d..00000000 --- a/ANDROID_3.4.5/include/linux/atomic.h +++ /dev/null @@ -1,106 +0,0 @@ -/* Atomic operations usable in machine independent code */ -#ifndef _LINUX_ATOMIC_H -#define _LINUX_ATOMIC_H -#include <asm/atomic.h> - -/** - * atomic_add_unless - add unless the number is already a given value - * @v: pointer of type atomic_t - * @a: the amount to add to v... - * @u: ...unless v is equal to u. - * - * Atomically adds @a to @v, so long as @v was not already @u. - * Returns non-zero if @v was not @u, and zero otherwise. - */ -static inline int atomic_add_unless(atomic_t *v, int a, int u) -{ - return __atomic_add_unless(v, a, u) != u; -} - -/** - * atomic_inc_not_zero - increment unless the number is zero - * @v: pointer of type atomic_t - * - * Atomically increments @v by 1, so long as @v is non-zero. - * Returns non-zero if @v was non-zero, and zero otherwise. - */ -#ifndef atomic_inc_not_zero -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) -#endif - -/** - * atomic_inc_not_zero_hint - increment if not null - * @v: pointer of type atomic_t - * @hint: probable value of the atomic before the increment - * - * This version of atomic_inc_not_zero() gives a hint of probable - * value of the atomic. This helps processor to not read the memory - * before doing the atomic read/modify/write cycle, lowering - * number of bus transactions on some arches. - * - * Returns: 0 if increment was not done, 1 otherwise. - */ -#ifndef atomic_inc_not_zero_hint -static inline int atomic_inc_not_zero_hint(atomic_t *v, int hint) -{ - int val, c = hint; - - /* sanity test, should be removed by compiler if hint is a constant */ - if (!hint) - return atomic_inc_not_zero(v); - - do { - val = atomic_cmpxchg(v, c, c + 1); - if (val == c) - return 1; - c = val; - } while (c); - - return 0; -} -#endif - -#ifndef atomic_inc_unless_negative -static inline int atomic_inc_unless_negative(atomic_t *p) -{ - int v, v1; - for (v = 0; v >= 0; v = v1) { - v1 = atomic_cmpxchg(p, v, v + 1); - if (likely(v1 == v)) - return 1; - } - return 0; -} -#endif - -#ifndef atomic_dec_unless_positive -static inline int atomic_dec_unless_positive(atomic_t *p) -{ - int v, v1; - for (v = 0; v <= 0; v = v1) { - v1 = atomic_cmpxchg(p, v, v - 1); - if (likely(v1 == v)) - return 1; - } - return 0; -} -#endif - -#ifndef CONFIG_ARCH_HAS_ATOMIC_OR -static inline void atomic_or(int i, atomic_t *v) -{ - int old; - int new; - - do { - old = atomic_read(v); - new = old | i; - } while (atomic_cmpxchg(v, old, new) != old); -} -#endif /* #ifndef CONFIG_ARCH_HAS_ATOMIC_OR */ - -#include <asm-generic/atomic-long.h> -#ifdef CONFIG_GENERIC_ATOMIC64 -#include <asm-generic/atomic64.h> -#endif -#endif /* _LINUX_ATOMIC_H */ |