ATOMIC_AND(9F) Kernel Functions for Drivers ATOMIC_AND(9F)


NAME


atomic_and, atomic_and_8, atomic_and_uchar, atomic_and_16,
atomic_and_ushort, atomic_and_32, atomic_and_uint, atomic_and_ulong,
atomic_and_64, atomic_and_8_nv, atomic_and_uchar_nv, atomic_and_16_nv,
atomic_and_ushort_nv, atomic_and_32_nv, atomic_and_uint_nv,
atomic_and_ulong_nv, atomic_and_64_nv - atomic AND operations

SYNOPSIS


#include <sys/atomic.h>

void atomic_and_8(volatile uint8_t *target, uint8_t bits);


void atomic_and_uchar(volatile uchar_t *target, uchar_t bits);


void atomic_and_16(volatile uint16_t *target, uint16_t bits);


void atomic_and_ushort(volatile ushort_t *target, ushort_t bits);


void atomic_and_32(volatile uint32_t *target, uint32_t bits);


void atomic_and_uint(volatile uint_t *target, uint_t bits);


void atomic_and_ulong(volatile ulong_t *target, ulong_t bits);


void atomic_and_64(volatile uint64_t *target, uint64_t bits);


uint8_t atomic_and_8_nv(volatile uint8_t *target, uint8_t bits);


uchar_t atomic_and_uchar_nv(volatile uchar_t *target, uchar_t bits);


uint16_t atomic_and_16_nv(volatile uint16_t *target, uint16_t bits);


ushort_t atomic_and_ushort_nv(volatile ushort_t *target, ushort_t bits);


uint32_t atomic_and_32_nv(volatile uint32_t *target, uint32_t bits);


uint_t atomic_and_uint_nv(volatile uint_t *target, uint_t bits);


ulong_t atomic_and_ulong_nv(volatile ulong_t *target, ulong_t bits);


uint64_t atomic_and_64_nv(volatile uint64_t *target, uint64_t bits);


DESCRIPTION


These functions enable the bitwise AND of bits to the value stored in
target to occur in an atomic manner.

RETURN VALUES


The *_nv() variants of these functions return the new value of target.

ERRORS


No errors are defined.

CONTEXT


These functions can be called from user, interrupt, or kernel context.

ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+

SEE ALSO


atomic_add(9F), atomic_bits(9F), atomic_cas(9F), atomic_dec(9F),
atomic_inc(9F), atomic_or(9F), atomic_swap(9F), membar_ops(9F),
attributes(5), atomic_ops(3C)

NOTES


The *_nv() variants are substantially more expensive on some platforms
than the versions that do not return values. Do not use them unless you
need to know the new value atomically.


January 16, 2006 ATOMIC_AND(9F)