1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef __ARCH_I386_ATOMIC__ 13 #define __ARCH_I386_ATOMIC__ 14 15 #include <linux/compiler.h> 16 #include <asm/processor.h> 17 #include <asm/cmpxchg.h> 18 19 typedef struct { int counter; } atomic_t; 20 21 #define ATOMIC_INIT(i) { (i) } 22 23 #define atomic_read(v) ((v)->counter) 24 25 #define atomic_set(v,i) (((v)->counter) = (i)) 26 27 #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) 28 #define atomic_xchg(v, new) (xchg(&((v)->counter), (new))) 29 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) 30 #define atomic_inc_return(v) (atomic_add_return(1,v)) 31 #define atomic_dec_return(v) (atomic_sub_return(1,v)) 32 #define atomic_clear_mask(mask, addr) __asm__ __volatile__(LOCK_PREFIX "andl %0,%1" : : "r" (~(mask)),"m" (*addr) : "memory") 33 #define atomic_set_mask(mask, addr) __asm__ __volatile__(LOCK_PREFIX "orl %0,%1" : : "r" (mask),"m" (*(addr)) : "memory") 34 #define smp_mb__before_atomic_dec() barrier() 35 #define smp_mb__after_atomic_dec() barrier() 36 #define smp_mb__before_atomic_inc() barrier() 37 #define smp_mb__after_atomic_inc() barrier() 38 #include <asm-generic/atomic.h> 39 #endif 40
