| ATOMIC_OR(3) | Library Functions Manual | ATOMIC_OR(3) | 
atomic_or, atomic_or_32,
  atomic_or_uint,
  atomic_or_ulong, atomic_or_64,
  atomic_or_32_nv,
  atomic_or_uint_nv,
  atomic_or_ulong_nv,
  atomic_or_64_nv —
#include <sys/atomic.h>
void
  
  atomic_or_32(volatile
    uint32_t *ptr, uint32_t
    bits);
void
  
  atomic_or_uint(volatile
    unsigned int *ptr,
    unsigned int bits);
void
  
  atomic_or_ulong(volatile
    unsigned long *ptr,
    unsigned long bits);
void
  
  atomic_or_64(volatile
    uint64_t *ptr, uint64_t
    bits);
uint32_t
  
  atomic_or_32_nv(volatile
    uint32_t *ptr, uint32_t
    bits);
unsigned int
  
  atomic_or_uint_nv(volatile
    unsigned int *ptr,
    unsigned int bits);
unsigned long
  
  atomic_or_ulong_nv(volatile
    unsigned long *ptr,
    unsigned long bits);
uint64_t
  
  atomic_or_64_nv(volatile
    uint64_t *ptr, uint64_t
    bits);
atomic_or family of functions load the value of the
  variable referenced by ptr, perform a bitwise
  ‘or’ with the value bits, and store the
  result back 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_or functions first appeared in
  NetBSD 5.0.
| April 11, 2007 | NetBSD 9.3 |