NAME
atomic_inc,
atomic_inc_32,
atomic_inc_uint,
atomic_inc_ulong,
atomic_inc_ptr,
atomic_inc_64,
atomic_inc_32_nv,
atomic_inc_uint_nv,
atomic_inc_ulong_nv,
atomic_inc_ptr_nv,
atomic_inc_64_nv —
atomic increment
operations
SYNOPSIS
#include <sys/atomic.h>
void
atomic_inc_32(
volatile
uint32_t *ptr);
void
atomic_inc_uint(
volatile
unsigned int *ptr);
void
atomic_inc_ulong(
volatile
unsigned long *ptr);
void
atomic_inc_ptr(
volatile
void *ptr);
void
atomic_inc_64(
volatile
uint64_t *ptr);
uint32_t
atomic_inc_32_nv(
volatile
uint32_t *ptr);
unsigned int
atomic_inc_uint_nv(
volatile
unsigned int *ptr);
unsigned long
atomic_inc_ulong_nv(
volatile
unsigned long *ptr);
void *
atomic_inc_ptr_nv(
volatile
void *ptr);
uint64_t
atomic_inc_64_nv(
volatile
uint64_t *ptr);
DESCRIPTION
The
atomic_inc family of functions increment (by one) 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_inc functions first appeared in
NetBSD 5.0.