.\"
.\" Copyright 2013 Samy Al Bahra.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"
.Dd April 7, 2013
.Dt ck_pr_fence_store 3
.Sh NAME
.Nm ck_pr_fence_store
.Nd enforce partial ordering of store operations
.Sh LIBRARY
Concurrency Kit (libck, \-lck)
.Sh SYNOPSIS
.In ck_pr.h
.Ft void
.Fn ck_pr_fence_store void
.Ft void
.Fn ck_pr_fence_strict_store void
.Sh DESCRIPTION
The
.Fn ck_pr_fence_store
function enforces the ordering of any memory store,
.Fn ck_pr_store
and atomic read-modify-write operations relative to
the invocation of the function. This function
always serve as an implicit compiler barrier. On
architectures implementing CK_MD_TSO, this operation
only serves as a compiler barrier and no fences
are emitted. On architectures implementing
CK_MD_PSO and CK_MD_RMO, a store fence is
emitted. To force the unconditional emission of
a store fence, use
.Fn ck_pr_fence_strict_store .
.Sh EXAMPLE
.Bd -literal -offset indent

#include <ck_pr.h>

static int a = 0;
static int b = 0;
static int c = 0;

void
function(void)
{

	ck_pr_store_int(&a, 1);

	/*
	 * Guarantee that the store to a is completed
	 * with respect to the stores of b and c.
	 */
	ck_pr_fence_store();
	ck_pr_store_int(&b, 2);
	ck_pr_store_int(&c, 2);

	return;
}
.Ed
.Sh RETURN VALUES
This function has no return value.
.Sh SEE ALSO
.Xr ck_pr_stall 3 ,
.Xr ck_pr_fence_atomic 3 ,
.Xr ck_pr_fence_atomic_store 3 ,
.Xr ck_pr_fence_atomic_load 3 ,
.Xr ck_pr_fence_load 3 ,
.Xr ck_pr_fence_load_atomic 3 ,
.Xr ck_pr_fence_load_store 3 ,
.Xr ck_pr_fence_load_depends 3 ,
.Xr ck_pr_fence_memory 3 ,
.Xr ck_pr_barrier 3 ,
.Xr ck_pr_fas 3 ,
.Xr ck_pr_load 3 ,
.Xr ck_pr_store 3 ,
.Xr ck_pr_faa 3 ,
.Xr ck_pr_inc 3 ,
.Xr ck_pr_dec 3 ,
.Xr ck_pr_neg 3 ,
.Xr ck_pr_not 3 ,
.Xr ck_pr_add 3 ,
.Xr ck_pr_sub 3 ,
.Xr ck_pr_and 3 ,
.Xr ck_pr_or 3 ,
.Xr ck_pr_xor 3 ,
.Xr ck_pr_cas 3 ,
.Xr ck_pr_btc 3 ,
.Xr ck_pr_bts 3 ,
.Xr ck_pr_btr 3
.Pp
Additional information available at http://concurrencykit.org/