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[libcxx] Allow explicit pthread opt-in

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The existing pthread detection code in __config is pretty good for
common operating systems. It doesn't allow cmake-time choices to be
made for uncommon operating systems though.

This change adds the LIBCXX_HAS_PTHREAD_API cmake flag, which turns
into the _LIBCPP_HAS_THREAD_API_PTHREAD preprocessor define. This is
a name change from the old _LIBCPP_THREAD_API_PTHREAD. The lit tests
want __config_site.in variables to have a _LIBCPP_HAS prefix.

http://reviews.llvm.org/D20573


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@270735 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ben Craig
2016-05-25 17:40:09 +00:00
parent fc1962da37
commit 5163e46afb
4 changed files with 18 additions and 6 deletions
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6
include/__threading_support
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@@ -19,14 +19,14 @@
#ifndef _LIBCPP_HAS_NO_THREADS
#if defined(_LIBCPP_THREAD_API_PTHREAD)
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
#include <pthread.h>
#include <sched.h>
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if defined(_LIBCPP_THREAD_API_PTHREAD)
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
// Mutex
#define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
@@ -194,7 +194,7 @@ void __libcpp_tl_set(__libcpp_tl_key __key, void* __p)
pthread_setspecific(__key, __p);
}
#else // !_LIBCPP_THREAD_API_PTHREAD
#else // !_LIBCPP_HAS_THREAD_API_PTHREAD
#error "No thread API selected."
#endif