ATOMIC_SETBITS_INT(9)

NAME
atomic_setbits_int, atomic_clearbits_int - interface to perform atomic operations on data

SYNOPSIS
#include <sys/atomic.h>
void
atomic_setbits_int(unsigned int *p, unsigned int b);
void
atomic_clearbits_int(unsigned int *p, unsigned int b);

DESCRIPTION
The atomic bits set of functions provide an interface for changing data atomically with respect to interrupts and multiple processors in the system.

The atomic_setbits_int() function sets the bits in b in the integer pointed to by p. It is equivalent to

    *p |= b;

The atomic_clearbits_int() function clears the bits in b in the integer pointed to by p. It is equivalent to

    *p &= ~b;

CONTEXT
atomic_setbits_int(), and atomic_clearbits_int() can be called during autoconf, from process context, or from interrupt context.

SEE ALSO
atomic_add_int(9), atomic_cas_uint(9), atomic_dec_int(9), atomic_inc_int(9), atomic_sub_int(9), atomic_swap_uint(9)

HISTORY
The atomic_setbits_int functions first appeared in OpenBSD 4.1.