2 Commits

Author	SHA1	Message	Date
Asiri Rathnayake	49a9e0c64c	[libcxx] Improve design documentation for the external-thread-library ... configuration NFC. Differential revision: https://reviews.llvm.org/D28610 Reviewers: EricWF git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@292108 91177308-0d34-0410-b5e6-96231b3b80d8	2017-01-16 12:44:08 +00:00
Eric Fiselier	66134e8a5f	[libc++] Cleanup and document <__threading_support> ... Summary: This patch attempts to clean up the macro configuration mess in `<__threading_support>`, specifically the mess involving external threading variants. Additionally this patch adds design documentation for `<__threading_support>` and the configuration macros it uses. The primary change in this patch is separating the idea of an "external API" provided by `<__external_threading>` and the idea of having an external threading library. Now `_LIBCPP_HAS_THREAD_API_EXTERNAL` means that libc++ should use `<__external_threading>` and that the header is expected to exist. Additionally the new macro `_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL` is now used to configure for using an "external library" with the default threading API. Reviewers: compnerd, rmaprath Subscribers: smeenai, cfe-commits, mgorny Differential Revision: https://reviews.llvm.org/D28316 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291275 91177308-0d34-0410-b5e6-96231b3b80d8	2017-01-06 20:05:40 +00:00