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[libcxx] Do not declare the thread api when __external_threading is present 

This fixes a small omission where even when __external_threading is provided,
we attempt to declare a pthread based threading API. Instead, we should leave
out everything for the __external_threading header to take care of.

The __threading_support header provides a proof-of-concept externally threaded
libc++ variant when _LIBCPP_HAS_THREAD_API_EXTERNAL is defined. But if the
__external_threading header is present, we should exclude all of that POC stuff.

Reviewers: EricWF

Differential revision: https://reviews.llvm.org/D25468

llvm-svn: 284232
This commit is contained in:
Asiri Rathnayake 2016-10-14 13:00:07 +00:00
parent 4b7bb3cc96
commit 81c0be3f56
1 changed files with 5 additions and 4 deletions
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9
libcxx/include/__threading_support
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@ -25,17 +25,16 @@
#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
#if !defined(__clang__) && (_GNUC_VER < 500)
#include <__external_threading>
#define _LIBCPP_EXTERNAL_THREADING
#define _LIBCPP_HAS_EXTERNAL_THREADING_HEADER
#elif !defined(__has_include) || __has_include(<__external_threading>)
#include <__external_threading>
#define _LIBCPP_EXTERNAL_THREADING
#define _LIBCPP_HAS_EXTERNAL_THREADING_HEADER
#endif
#endif
#if !defined(_LIBCPP_EXTERNAL_THREADING)
#if !defined(_LIBCPP_HAS_EXTERNAL_THREADING_HEADER)
#include <pthread.h>
#include <sched.h>
#endif
#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
#define _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_FUNC_VIS
@ -242,6 +241,8 @@ void __libcpp_tls_set(__libcpp_tls_key __key, void* __p)
_LIBCPP_END_NAMESPACE_STD
#endif // !_LIBCPP_HAS_EXTERNAL_THREADING_HEADER
#endif // _LIBCPP_HAS_NO_THREADS
#endif // _LIBCPP_THREADING_SUPPORT