diff options
author | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-11-18 22:13:44 +0000 |
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committer | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-11-18 22:13:44 +0000 |
commit | cd404a14a1515ecd35ab368fe02df305d15656aa (patch) | |
tree | 08274b8bbbefd907bbf6dbb3658d87467546b2a9 /libatomic/fence.c | |
parent | 51f32d1f3585e26b92fc0203128f0936ea7ca932 (diff) |
Add out-of-line versions of some <stdatomic.h> functions (PR c/65083).
PR c/65083 notes that some functions in <stdatomic.h> are normal
functions, not generic functions, and so need to have out-of-line
copies that can be called when macro expansion is suppressed (unlike
the generic functions where DR#419 makes it undefined if you suppress
a macro expansion).
This patch adds such out-of-line definitions in libatomic for those
six functions, at a new LIBATOMIC_1.2 symbol version, as trivial
wrappers to the <stdatomic.h> macros, along with declarations of those
functions in <stdatomic.h>. Tests are added that are based on the
corresponding tests for the macros, but with parentheses around the
function names to force the out-of-line functions to be used.
Bootstrapped with no regressions on x86_64-pc-linux-gnu.
gcc:
* ginclude/stdatomic.h (atomic_thread_fence, atomic_signal_fence)
(atomic_flag_test_and_set, atomic_flag_test_and_set_explicit)
(atomic_flag_clear, atomic_flag_clear_explicit): Declare as
functions before defining as macros.
gcc/testsuite:
* gcc.dg/atomic/stdatomic-fence-2.c,
gcc.dg/atomic/stdatomic-flag-2.c: New tests.
libatomic:
* fence.c, flag.c: New files.
* Makefile.am (libatomic_la_SOURCES): Add fence.c and flag.c.
* Makefile.in: Regenerate.
* configure.ac (libtool_VERSION): Change to 3:0:2.
* configure: Regenerate.
* libatomic.map (LIBATOMIC_1.2): New symbol version.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230578 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libatomic/fence.c')
-rw-r--r-- | libatomic/fence.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/libatomic/fence.c b/libatomic/fence.c new file mode 100644 index 00000000000..a4152f1a469 --- /dev/null +++ b/libatomic/fence.c @@ -0,0 +1,45 @@ +/* Copyright (C) 2015 Free Software Foundation, Inc. + + This file is part of the GNU Atomic Library (libatomic). + + Libatomic is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +#include "libatomic_i.h" + +#include <stdatomic.h> + +/* Out-of-line versions of <stdatomic.h> fence functions. */ + +/* Fence as specified by ORDER. */ + +void +(atomic_thread_fence) (memory_order order) +{ + atomic_thread_fence (order); +} + +/* Fence as specified by ORDER but only establishing ordering between + a thread and a signal handler executed in that thread. */ + +void +(atomic_signal_fence) (memory_order order) +{ + atomic_signal_fence (order); +} |