LXR linux/arch/sparc/include/asm/atomic

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* atomic.h: These still suck, but the I-cache hit rate is higher.
   3 *
   4 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
   5 * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au)
   6 * Copyright (C) 2007 Kyle McMartin (kyle@parisc-linux.org)
   7 *
   8 * Additions by Keith M Wesolowski (wesolows@foobazco.org) based
   9 * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>.
  10 */
  11
  12#ifndef __ARCH_SPARC_ATOMIC__
  13#define __ARCH_SPARC_ATOMIC__
  14
  15#include <linux/types.h>
  16
  17#include <asm/cmpxchg.h>
  18#include <asm/barrier.h>
  19#include <asm-generic/atomic64.h>
  20
  21#define ATOMIC_INIT(i)  { (i) }
  22
  23int atomic_add_return(int, atomic_t *);
  24int atomic_fetch_add(int, atomic_t *);
  25int atomic_fetch_and(int, atomic_t *);
  26int atomic_fetch_or(int, atomic_t *);
  27int atomic_fetch_xor(int, atomic_t *);
  28int atomic_cmpxchg(atomic_t *, int, int);
  29int atomic_xchg(atomic_t *, int);
  30int atomic_fetch_add_unless(atomic_t *, int, int);
  31void atomic_set(atomic_t *, int);
  32
  33#define atomic_fetch_add_unless atomic_fetch_add_unless
  34
  35#define atomic_set_release(v, i)        atomic_set((v), (i))
  36
  37#define atomic_read(v)          READ_ONCE((v)->counter)
  38
  39#define atomic_add(i, v)        ((void)atomic_add_return( (int)(i), (v)))
  40#define atomic_sub(i, v)        ((void)atomic_add_return(-(int)(i), (v)))
  41
  42#define atomic_and(i, v)        ((void)atomic_fetch_and((i), (v)))
  43#define atomic_or(i, v)         ((void)atomic_fetch_or((i), (v)))
  44#define atomic_xor(i, v)        ((void)atomic_fetch_xor((i), (v)))
  45
  46#define atomic_sub_return(i, v) (atomic_add_return(-(int)(i), (v)))
  47#define atomic_fetch_sub(i, v)  (atomic_fetch_add (-(int)(i), (v)))
  48
  49#endif /* !(__ARCH_SPARC_ATOMIC__) */
  50