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ATOMIC_AND(3) FreeBSD Library Functions Manual ATOMIC_AND(3) 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 bitwise `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 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. SEE ALSO atomic_ops(3) HISTORY The atomic_and functions first appeared in NetBSD 5.0. FreeBSD 14.1-RELEASE-p8 April 11, 2007 FreeBSD 14.1-RELEASE-p8