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#ifndef _SPL_ATOMIC_H
#define _SPL_ATOMIC_H
#ifdef __cplusplus
extern "C" {
#endif
#include <linux/module.h>
/* FIXME - NONE OF THIS IS ATOMIC, IT SHOULD BE. I think we can
* get by for now since I'm only working on real 64bit systems but
* this will need to be addressed properly.
*/
static __inline__ void
atomic_inc_64(volatile uint64_t *target)
{
(*target)++;
}
static __inline__ void
atomic_dec_64(volatile uint64_t *target)
{
(*target)--;
}
static __inline__ uint32_t
atomic_add_32(volatile uint32_t *target, int32_t delta)
{
uint32_t rc = *target;
*target += delta;
return rc;
}
static __inline__ uint64_t
atomic_add_64(volatile uint64_t *target, uint64_t delta)
{
uint64_t rc = *target;
*target += delta;
return rc;
}
static __inline__ uint64_t
atomic_add_64_nv(volatile uint64_t *target, uint64_t delta)
{
*target += delta;
return *target;
}
static __inline__ uint64_t
atomic_cas_64(volatile uint64_t *target, uint64_t cmp,
uint64_t newval)
{
uint64_t rc = *target;
if (*target == cmp)
*target = newval;
return rc;
}
static __inline__ void *
atomic_cas_ptr(volatile void *target, void *cmp, void *newval)
{
void *rc = (void *)target;
if (target == cmp)
target = newval;
return rc;
}
#ifdef __cplusplus
}
#endif
#endif /* _SPL_ATOMIC_H */
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