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| author | Jonathan Wakely <jwakely@redhat.com> | 2022-12-12 12:49:40 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-12-12 14:00:09 +0000 |
| commit | 320ac807da125e6dc952b3d4abf02daeead88d44 (patch) | |
| tree | 1c7284882b370bda155cd16bee43f38d4dc27db5 /libstdc++-v3/include/std | |
| parent | 2327d9331430777006008ab3b051afe2b4fc15bd (diff) | |
| download | gcc-320ac807da125e6dc952b3d4abf02daeead88d44.zip gcc-320ac807da125e6dc952b3d4abf02daeead88d44.tar.gz gcc-320ac807da125e6dc952b3d4abf02daeead88d44.tar.bz2 | |
libstdc++: Define atomic lock-free type aliases for C++20 [PR98034]
libstdc++-v3/ChangeLog:
PR libstdc++/98034
* include/std/atomic (__cpp_lib_atomic_lock_free_type_aliases):
Define macro.
(atomic_signed_lock_free, atomic_unsigned_lock_free): Define
aliases.
* include/std/version (__cpp_lib_atomic_lock_free_type_aliases):
Define macro.
* testsuite/29_atomics/atomic/lock_free_aliases.cc: New test.
Diffstat (limited to 'libstdc++-v3/include/std')
| -rw-r--r-- | libstdc++-v3/include/std/atomic | 17 | ||||
| -rw-r--r-- | libstdc++-v3/include/std/version | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/atomic b/libstdc++-v3/include/std/atomic index 356f145..857f927 100644 --- a/libstdc++-v3/include/std/atomic +++ b/libstdc++-v3/include/std/atomic @@ -1727,6 +1727,23 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION using __atomic_ref<_Tp>::operator=; }; +#define __cpp_lib_atomic_lock_free_type_aliases 201907L +#ifdef _GLIBCXX_HAVE_PLATFORM_WAIT + using atomic_signed_lock_free + = atomic<make_signed_t<__detail::__platform_wait_t>>; + using atomic_unsigned_lock_free + = atomic<make_unsigned_t<__detail::__platform_wait_t>>; +#elif ATOMIC_INT_LOCK_FREE || !(ATOMIC_LONG_LOCK_FREE || ATOMIC_CHAR_LOCK_FREE) + using atomic_signed_lock_free = atomic<signed int>; + using atomic_unsigned_lock_free = atomic<unsigned int>; +#elif ATOMIC_LONG_LOCK_FREE + using atomic_signed_lock_free = atomic<signed long>; + using atomic_unsigned_lock_free = atomic<unsigned long>; +#elif ATOMIC_CHAR_LOCK_FREE + using atomic_signed_lock_free = atomic<signed char>; + using atomic_unsigned_lock_free = atomic<unsigned char>; +#endif + #endif // C++2a /// @} group atomics diff --git a/libstdc++-v3/include/std/version b/libstdc++-v3/include/std/version index 3c7c440..61718eb 100644 --- a/libstdc++-v3/include/std/version +++ b/libstdc++-v3/include/std/version @@ -187,6 +187,7 @@ #define __cpp_lib_assume_aligned 201811L #define __cpp_lib_atomic_flag_test 201907L #define __cpp_lib_atomic_float 201711L +#define __cpp_lib_atomic_lock_free_type_aliases 201907L #define __cpp_lib_atomic_ref 201806L #define __cpp_lib_atomic_value_initialization 201911L #define __cpp_lib_bind_front 201907L |