LXR linux/arch/metag/include/asm/atomic.h

   1#ifndef __ASM_METAG_ATOMIC_H
   2#define __ASM_METAG_ATOMIC_H
   3
   4#include <linux/compiler.h>
   5#include <linux/types.h>
   6#include <asm/cmpxchg.h>
   7#include <asm/barrier.h>
   8
   9#if defined(CONFIG_METAG_ATOMICITY_IRQSOFF)
  10/* The simple UP case. */
  11#include <asm-generic/atomic.h>
  12#else
  13
  14#if defined(CONFIG_METAG_ATOMICITY_LOCK1)
  15#include <asm/atomic_lock1.h>
  16#else
  17#include <asm/atomic_lnkget.h>
  18#endif
  19
  20#define atomic_add_negative(a, v)       (atomic_add_return((a), (v)) < 0)
  21
  22#define atomic_dec_return(v) atomic_sub_return(1, (v))
  23#define atomic_inc_return(v) atomic_add_return(1, (v))
  24
  25/*
  26 * atomic_inc_and_test - increment and test
  27 * @v: pointer of type atomic_t
  28 *
  29 * Atomically increments @v by 1
  30 * and returns true if the result is zero, or false for all
  31 * other cases.
  32 */
  33#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
  34
  35#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
  36#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
  37
  38#define atomic_inc(v) atomic_add(1, (v))
  39#define atomic_dec(v) atomic_sub(1, (v))
  40
  41#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
  42
  43#endif
  44
  45#define atomic_dec_if_positive(v)       atomic_sub_if_positive(1, v)
  46
  47#include <asm-generic/atomic64.h>
  48
  49#endif /* __ASM_METAG_ATOMIC_H */
  50