| ATOMIC_ADD(3) | Library Functions Manual | ATOMIC_ADD(3) |
atomic_add, atomic_add_32,
atomic_add_int,
atomic_add_long,
atomic_add_ptr, atomic_add_64,
atomic_add_32_nv,
atomic_add_int_nv,
atomic_add_long_nv,
atomic_add_ptr_nv,
atomic_add_64_nv —
#include <sys/atomic.h>
void
atomic_add_32(volatile
uint32_t *ptr, int32_t
delta);
void
atomic_add_int(volatile
unsigned int *ptr, int
delta);
void
atomic_add_long(volatile
unsigned long *ptr, long
delta);
void
atomic_add_ptr(volatile
void *ptr, ssize_t
delta);
void
atomic_add_64(volatile
uint64_t *ptr, int64_t
delta);
uint32_t
atomic_add_32_nv(volatile
uint32_t *ptr, int32_t
delta);
unsigned int
atomic_add_int_nv(volatile
unsigned int *ptr, int
delta);
unsigned long
atomic_add_long_nv(volatile
unsigned long *ptr, long
delta);
void *
atomic_add_ptr_nv(volatile
void *ptr, ssize_t
delta);
uint64_t
atomic_add_64_nv(volatile
uint64_t *ptr, int64_t
delta);
atomic_add family of functions add a signed value
delta to the variable referenced by
ptr in an atomic fashion.
The *_nv() variants of these functions
return the new value.
The 64-bit variants of these functions are available only on
platforms that can support atomic 64-bit memory access. Applications can
check for the availability of 64-bit atomic memory operations by testing if
the pre-processor macro __HAVE_ATOMIC64_OPS is
defined.
atomic_add functions first appeared in
NetBSD 5.0.
| April 11, 2007 | NetBSD 9.1 |