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| author | Joseph Myers <joseph@codesourcery.com> | 2015-11-18 22:13:44 +0000 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2015-11-18 22:13:44 +0000 |
| commit | c29c36ad5d0b283404cbbaae75a4b9fb827491f2 (patch) | |
| tree | 08274b8bbbefd907bbf6dbb3658d87467546b2a9 /gcc/ginclude/stdatomic.h | |
| parent | 2b2a2e9e1eb75ccb1adabaa2a65716c17707a7b9 (diff) | |
| download | gcc-c29c36ad5d0b283404cbbaae75a4b9fb827491f2.zip gcc-c29c36ad5d0b283404cbbaae75a4b9fb827491f2.tar.gz gcc-c29c36ad5d0b283404cbbaae75a4b9fb827491f2.tar.bz2 | |
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.
From-SVN: r230578
Diffstat (limited to 'gcc/ginclude/stdatomic.h')
| -rw-r--r-- | gcc/ginclude/stdatomic.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/ginclude/stdatomic.h b/gcc/ginclude/stdatomic.h index b961da2..eb3b4d6 100644 --- a/gcc/ginclude/stdatomic.h +++ b/gcc/ginclude/stdatomic.h @@ -91,7 +91,9 @@ typedef _Atomic __UINTMAX_TYPE__ atomic_uintmax_t; __kill_dependency_tmp; \ }) +extern void atomic_thread_fence (memory_order); #define atomic_thread_fence(MO) __atomic_thread_fence (MO) +extern void atomic_signal_fence (memory_order); #define atomic_signal_fence(MO) __atomic_signal_fence (MO) #define atomic_is_lock_free(OBJ) __atomic_is_lock_free (sizeof (*(OBJ)), (OBJ)) @@ -227,12 +229,17 @@ typedef _Atomic struct #define ATOMIC_FLAG_INIT { 0 } +extern _Bool atomic_flag_test_and_set (volatile atomic_flag *); #define atomic_flag_test_and_set(PTR) \ __atomic_test_and_set ((PTR), __ATOMIC_SEQ_CST) +extern _Bool atomic_flag_test_and_set_explicit (volatile atomic_flag *, + memory_order); #define atomic_flag_test_and_set_explicit(PTR, MO) \ __atomic_test_and_set ((PTR), (MO)) +extern void atomic_flag_clear (volatile atomic_flag *); #define atomic_flag_clear(PTR) __atomic_clear ((PTR), __ATOMIC_SEQ_CST) +extern void atomic_flag_clear_explicit (volatile atomic_flag *, memory_order); #define atomic_flag_clear_explicit(PTR, MO) __atomic_clear ((PTR), (MO)) #endif /* _STDATOMIC_H */ |