NAME
atomic_and,
atomic_and_32,
atomic_and_uint,
atomic_and_ulong,
atomic_and_64,
atomic_and_32_nv,
atomic_and_uint_nv,
atomic_and_ulong_nv,
atomic_and_64_nv —
atomic logical
‘and’ operations
SYNOPSIS
#include <sys/atomic.h>
void
atomic_and_32(
volatile
uint32_t *ptr,
uint32_t
bits);
void
atomic_and_uint(
volatile
unsigned int *ptr,
unsigned
int bits);
void
atomic_and_ulong(
volatile
unsigned long *ptr,
unsigned long bits);
void
atomic_and_64(
volatile
uint64_t *ptr,
uint64_t
bits);
uint32_t
atomic_and_32_nv(
volatile
uint32_t *ptr,
uint32_t
bits);
unsigned int
atomic_and_uint_nv(
volatile
unsigned int *ptr,
unsigned
int bits);
unsigned long
atomic_and_ulong_nv(
volatile
unsigned long *ptr,
unsigned long bits);
uint64_t
atomic_and_64_nv(
volatile
uint64_t *ptr,
uint64_t
bits);
DESCRIPTION
The
atomic_and family of functions load the value of the
variable referenced by
ptr, perform a logical
‘and’ 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.
SEE ALSO
atomic_ops(3)
HISTORY
The
atomic_and functions first appeared in
NetBSD 5.0.