| 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 9.3 |