libc/kernel/arch-x86/asm/local_32.h

/****************************************************************************
 ****************************************************************************
 ***
 ***   This header was automatically generated from a Linux kernel header
 ***   of the same name, to make information necessary for userspace to
 ***   call into the kernel available to libc.  It contains only constants,
 ***   structures, and macros generated from the original header, and thus,
 ***   contains no copyrightable information.
 ***
 ****************************************************************************
 ****************************************************************************/
#ifndef _ARCH_I386_LOCAL_H
#define _ARCH_I386_LOCAL_H

#include <linux/percpu.h>
#include <asm/system.h>
#include <asm/atomic.h>

typedef struct
{
 atomic_long_t a;
} local_t;

#define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) }

#define local_read(l) atomic_long_read(&(l)->a)
#define local_set(l,i) atomic_long_set(&(l)->a, (i))

#define local_inc_return(l) (local_add_return(1,l))
#define local_dec_return(l) (local_sub_return(1,l))
#define local_cmpxchg(l, o, n)   (cmpxchg_local(&((l)->a.counter), (o), (n)))
#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
#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);  })
#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
#define __local_inc(l) local_inc(l)
#define __local_dec(l) local_dec(l)
#define __local_add(i,l) local_add((i),(l))
#define __local_sub(i,l) local_sub((i),(l))
#define cpu_local_wrap_v(l)   ({ local_t res__;   preempt_disable();   res__ = (l);   preempt_enable();   res__; })
#define cpu_local_wrap(l)   ({ preempt_disable();   l;   preempt_enable(); })  
#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
#define __cpu_local_inc(l) cpu_local_inc(l)
#define __cpu_local_dec(l) cpu_local_dec(l)
#define __cpu_local_add(i, l) cpu_local_add((i), (l))
#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
#endif