c29c36ad5d
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. From-SVN: r230578
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/* Copyright (C) 2015 Free Software Foundation, Inc.
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This file is part of the GNU Atomic Library (libatomic).
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Libatomic is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libatomic_i.h"
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#include <stdatomic.h>
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/* Out-of-line versions of <stdatomic.h> flag functions. */
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/* Atomically set *OBJECT to true, returning the previous value. */
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_Bool
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(atomic_flag_test_and_set) (volatile atomic_flag *object)
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{
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return atomic_flag_test_and_set (object);
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}
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/* Atomically set *OBJECT to true, returning the previous value, with
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memory affected according to ORDER. */
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_Bool
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(atomic_flag_test_and_set_explicit) (volatile atomic_flag *object,
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memory_order order)
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{
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return atomic_flag_test_and_set_explicit (object, order);
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}
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/* Atomically set *OBJECT to false. */
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void
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(atomic_flag_clear) (volatile atomic_flag *object)
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{
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atomic_flag_clear (object);
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}
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/* Atomically set *OBJECT to false, with memory affected according to
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ORDER. */
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void
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(atomic_flag_clear_explicit) (volatile atomic_flag *object,
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memory_order order)
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{
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return atomic_flag_clear_explicit (object, order);
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}
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