ATOMIC_INC(3) | Library Functions Manual | ATOMIC_INC(3)

# 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.

April 11, 2007 | NetBSD 8.2