Author: dim Date: Tue Sep 22 13:55:37 2015 New Revision: 248313 URL: http://llvm.org/viewvc/llvm-project?rev=248313&view=rev Log: Add placeholder __libcpp_relaxed_store() for when atomic builtins are not available.
Summary: In rL241532, atomic_support.h was added, which provides handling of atomic operations for libc++. When atomic builtins are not available, it emits a warning about being unsupported, but it still provides a number of stubs for the required functions. However, it misses a stub for `__libcpp_relaxed_store()`. Add it, by using the same implementation as for `__libcpp_atomic_store()`. (Note that I encountered this on arm-freebsd, which still defaults to armv4, and does not have the runtime libcalls to support atomic builtins. For now, I have simply disabled using them.) Reviewers: mclow.lists, EricWF Subscribers: theraven, cfe-commits, jroelofs, majnemer, aemerson Differential Revision: http://reviews.llvm.org/D13051 Modified: libcxx/trunk/src/include/atomic_support.h Modified: libcxx/trunk/src/include/atomic_support.h URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/src/include/atomic_support.h?rev=248313&r1=248312&r2=248313&view=diff ============================================================================== --- libcxx/trunk/src/include/atomic_support.h (original) +++ libcxx/trunk/src/include/atomic_support.h Tue Sep 22 13:55:37 2015 @@ -103,6 +103,13 @@ void __libcpp_atomic_store(_ValueType* _ *__dest = __val; } +template <class _ValueType, class _FromType> +inline _LIBCPP_INLINE_VISIBILITY +void __libcpp_relaxed_store(_ValueType* __dest, _FromType __val) +{ + *__dest = __val; +} + template <class _ValueType> inline _LIBCPP_INLINE_VISIBILITY _ValueType __libcpp_atomic_load(_ValueType const* __val, _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits