/* $NetBSD: atomic.h,v 1.9 2008/06/22 13:23:05 christos Exp $ */ #ifndef ISC_ATOMIC_H #define ISC_ATOMIC_H 1 #include <sys/atomic.h> #include <isc/types.h> /* * This routine atomically increments the value stored in 'p' by 'val', and * returns the previous value. */ static __inline isc_int32_t isc_atomic_xadd(isc_int32_t *p, isc_int32_t val) { return (isc_int32_t)atomic_add_32_nv((volatile uint32_t *)p, (uint32_t)val) - val; } #ifdef ISC_PLATFORM_HAVEXADDQ static __inline isc_int64_t isc_atomic_xaddq(isc_int64_t *p, isc_int64_t val) { return (isc_int64_t)atomic_add_64_nv((volatile uint64_t *)p, (uint64_t)val) - val; } #endif /* * This routine atomically stores the value 'val' in 'p'. */ static __inline void isc_atomic_store(isc_int32_t *p, isc_int32_t val) { (void)atomic_swap_32((volatile uint32_t *)p, (uint32_t)val); } /* * This routine atomically replaces the value in 'p' with 'val', if the * original value is equal to 'cmpval'. The original value is returned in any * case. */ static __inline__ isc_int32_t isc_atomic_cmpxchg(isc_int32_t *p, isc_int32_t cmpval, isc_int32_t val) { return (isc_int32_t) atomic_cas_32((volatile uint32_t *)p, (uint32_t)cmpval, (uint32_t)val); } #endif /* ISC_ATOMIC_H */