Updated: 2021/Apr/14

ATOMIC_AND(3) Library Functions Manual ATOMIC_AND(3)NAMEatomic_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 bitwise `and' operationsSYNOPSIS#include<sys/atomic.h>voidatomic_and_32(volatile uint32_t *ptr, uint32_t bits); voidatomic_and_uint(volatile unsigned int *ptr, unsigned int bits); voidatomic_and_ulong(volatile unsigned long *ptr, unsigned long bits); voidatomic_and_64(volatile uint64_t *ptr, uint64_t bits); uint32_tatomic_and_32_nv(volatile uint32_t *ptr, uint32_t bits); unsigned intatomic_and_uint_nv(volatile unsigned int *ptr, unsigned int bits); unsigned longatomic_and_ulong_nv(volatile unsigned long *ptr, unsigned long bits); uint64_tatomic_and_64_nv(volatile uint64_t *ptr, uint64_t bits);DESCRIPTIONTheatomic_andfamily of functions load the value of the variable referenced by ptr, perform a bitwise `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.SEEALSOatomic_ops(3)HISTORYTheatomic_andfunctions first appeared in NetBSD 5.0. NetBSD 9.99 April 11, 2007 NetBSD 9.99