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.