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_LOCAL_H 13 #define _ARCH_I386_LOCAL_H 14 15 #include <linux/percpu.h> 16 #include <asm/system.h> 17 #include <asm/atomic.h> 18 19 typedef struct 20 { 21 atomic_long_t a; 22 } local_t; 23 24 #define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) } 25 26 #define local_read(l) atomic_long_read(&(l)->a) 27 #define local_set(l,i) atomic_long_set(&(l)->a, (i)) 28 29 #define local_inc_return(l) (local_add_return(1,l)) 30 #define local_dec_return(l) (local_sub_return(1,l)) 31 #define local_cmpxchg(l, o, n) (cmpxchg_local(&((l)->a.counter), (o), (n))) 32 #define local_xchg(l, n) (xchg(&((l)->a.counter), (n))) 33 #define local_add_unless(l, a, u) ({ long c, old; c = local_read(l); for (;;) { if (unlikely(c == (u))) break; old = local_cmpxchg((l), c, c + (a)); if (likely(old == c)) break; c = old; } c != (u); }) 34 #define local_inc_not_zero(l) local_add_unless((l), 1, 0) 35 #define __local_inc(l) local_inc(l) 36 #define __local_dec(l) local_dec(l) 37 #define __local_add(i,l) local_add((i),(l)) 38 #define __local_sub(i,l) local_sub((i),(l)) 39 #define cpu_local_wrap_v(l) ({ local_t res__; preempt_disable(); res__ = (l); preempt_enable(); res__; }) 40 #define cpu_local_wrap(l) ({ preempt_disable(); l; preempt_enable(); }) 41 #define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l))) 42 #define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i))) 43 #define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l))) 44 #define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l))) 45 #define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l))) 46 #define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l))) 47 #define __cpu_local_inc(l) cpu_local_inc(l) 48 #define __cpu_local_dec(l) cpu_local_dec(l) 49 #define __cpu_local_add(i, l) cpu_local_add((i), (l)) 50 #define __cpu_local_sub(i, l) cpu_local_sub((i), (l)) 51 #endif 52