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      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