Date: Thu, 30 May 2013 06:20:50 +0000 (UTC) From: Ed Schouten <ed@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r251124 - head/lib/libcompiler_rt Message-ID: <201305300620.r4U6Ko74045697@svn.freebsd.org>
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Author: ed Date: Thu May 30 06:20:50 2013 New Revision: 251124 URL: http://svnweb.freebsd.org/changeset/base/251124 Log: Add __sync_synchronize(). This function can easily be implemented on top of the mb() macro provided by <machine/atomic.h>. Added: head/lib/libcompiler_rt/__sync_synchronize.c (contents, props changed) Modified: head/lib/libcompiler_rt/Makefile Modified: head/lib/libcompiler_rt/Makefile ============================================================================== --- head/lib/libcompiler_rt/Makefile Thu May 30 06:20:23 2013 (r251123) +++ head/lib/libcompiler_rt/Makefile Thu May 30 06:20:50 2013 (r251124) @@ -164,6 +164,7 @@ SRCF+= __sync_fetch_and_add_4 \ __sync_fetch_and_sub_4 \ __sync_fetch_and_xor_4 \ __sync_lock_test_and_set_4 \ + __sync_synchronize \ __sync_val_compare_and_swap_4 .endif .if ${MACHINE_ARCH:Mmips64*} != "" Added: head/lib/libcompiler_rt/__sync_synchronize.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/lib/libcompiler_rt/__sync_synchronize.c Thu May 30 06:20:50 2013 (r251124) @@ -0,0 +1,47 @@ +/*- + * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <machine/atomic.h> + +#ifdef __clang__ +static void +atomic_func(void) +#else +void +__sync_synchronize(void) +#endif +{ + + mb(); +} + +#ifdef __clang__ +__strong_reference(atomic_func, __sync_synchronize); +#endif
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