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



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 NetBSD5.0.