kernel-ark/include/asm-cris/atomic.h
Adrian Bunk d9b5444eeb [PATCH] cris: "extern inline" -> "static inline"
"extern inline" doesn't make much sense.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:53:30 -08:00

133 lines
2.9 KiB
C

/* $Id: atomic.h,v 1.3 2001/07/25 16:15:19 bjornw Exp $ */
#ifndef __ASM_CRIS_ATOMIC__
#define __ASM_CRIS_ATOMIC__
#include <asm/system.h>
#include <asm/arch/atomic.h>
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*/
typedef struct { volatile int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
#define atomic_set(v,i) (((v)->counter) = (i))
/* These should be written in asm but we do it in C for now. */
static inline void atomic_add(int i, volatile atomic_t *v)
{
unsigned long flags;
cris_atomic_save(v, flags);
v->counter += i;
cris_atomic_restore(v, flags);
}
static inline void atomic_sub(int i, volatile atomic_t *v)
{
unsigned long flags;
cris_atomic_save(v, flags);
v->counter -= i;
cris_atomic_restore(v, flags);
}
static inline int atomic_add_return(int i, volatile atomic_t *v)
{
unsigned long flags;
int retval;
cris_atomic_save(v, flags);
retval = (v->counter += i);
cris_atomic_restore(v, flags);
return retval;
}
#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
static inline int atomic_sub_return(int i, volatile atomic_t *v)
{
unsigned long flags;
int retval;
cris_atomic_save(v, flags);
retval = (v->counter -= i);
cris_atomic_restore(v, flags);
return retval;
}
static inline int atomic_sub_and_test(int i, volatile atomic_t *v)
{
int retval;
unsigned long flags;
cris_atomic_save(v, flags);
retval = (v->counter -= i) == 0;
cris_atomic_restore(v, flags);
return retval;
}
static inline void atomic_inc(volatile atomic_t *v)
{
unsigned long flags;
cris_atomic_save(v, flags);
(v->counter)++;
cris_atomic_restore(v, flags);
}
static inline void atomic_dec(volatile atomic_t *v)
{
unsigned long flags;
cris_atomic_save(v, flags);
(v->counter)--;
cris_atomic_restore(v, flags);
}
static inline int atomic_inc_return(volatile atomic_t *v)
{
unsigned long flags;
int retval;
cris_atomic_save(v, flags);
retval = (v->counter)++;
cris_atomic_restore(v, flags);
return retval;
}
static inline int atomic_dec_return(volatile atomic_t *v)
{
unsigned long flags;
int retval;
cris_atomic_save(v, flags);
retval = (v->counter)--;
cris_atomic_restore(v, flags);
return retval;
}
static inline int atomic_dec_and_test(volatile atomic_t *v)
{
int retval;
unsigned long flags;
cris_atomic_save(v, flags);
retval = --(v->counter) == 0;
cris_atomic_restore(v, flags);
return retval;
}
static inline int atomic_inc_and_test(volatile atomic_t *v)
{
int retval;
unsigned long flags;
cris_atomic_save(v, flags);
retval = ++(v->counter) == 0;
cris_atomic_restore(v, flags);
return retval;
}
/* Atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
#endif