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+.\" $OpenBSD: atomic_setbits_int.9,v 1.1 2014/02/04 20:55:22 dlg Exp $
+.\"
+.\" Copyright (c) 2007 Artur Grabowski <art@openbsd.org>
+.\" All rights reserved.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: February 4 2014 $
+.Dt ATOMIC_SETBITS_INT 9
+.Os
+.Sh NAME
+.Nm atomic_setbits_int ,
+.Nm atomic_clearbits_int
+.Nd interface to perform atomic operations on data
+.Sh SYNOPSIS
+.In sys/atomic.h
+.Ft void
+.Fn atomic_setbits_int "unsigned int *p" "unsigned int b"
+.Ft void
+.Fn atomic_clearbits_int "unsigned int *p" "unsigned int b"
+.Sh DESCRIPTION
+The atomic bits set of functions provide an interface for changing data atomically with respect to interrupts and multiple processors in the system.
+.Pp
+The
+.Fn atomic_setbits_int
+function sets the bits in
+.Fa b
+in the integer pointed to by
+.Fa p .
+It is equivalent to
+.Bd -literal -offset indent
+*p |= b;
+.Ed
+.Pp
+The
+.Fn atomic_clearbits_int
+function clears the bits in
+.Fa b
+in the integer pointed to by
+.Fa p .
+It is equivalent to
+.Bd -literal -offset indent
+*p &= ~b;
+.Ed
+.Sh SEE ALSO
+.Xr atomic_add 9 ,
+.Xr atomic_cas 9 ,
+.Xr atomic_dec 9 ,
+.Xr atomic_inc 9 ,
+.Xr atomic_sub 9 ,
+.Xr atomic_swap 9
+.Sh HISTORY
+The
+.Nm
+functions first appeared in
+.Ox 4.1 .