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[libcxx] Fix testing of the externally-threaded library build

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after r290850

Before r290850, building libcxx with -DLIBCXX_HAS_EXTERNAL_THREAD_API=ON had two
uses:
  - Allow platform vendors to plug-in an __external_threading header which
    should take care of the entire threading infrastructure of libcxx

  - Allow testing of an externally-threaded library build; where the thread API
    is declared using pthread data structures, and the implementation of this
    API is provided as a separate library (test/support/external_threads.cpp)
   and linked-in when running the test suite.

r290850 breaks the second use case (pthread data structures are no longer
available). This patch re-stores the ability to build+test an
externally-threaded library variant on a pthread based system.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@290878 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Asiri Rathnayake
2017-01-03 11:32:31 +00:00
parent d28b523b58
commit e29d9ff936
2 changed files with 18 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
include/__threading_support
View File

@@ -27,12 +27,24 @@
#endif
#endif
#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) && \
!__libcpp_has_include(<__external_threading>)
// If the <__external_threading> header is absent, build libc++ against a
// pthread-oriented thread api but leave out its implementation. This setup
// allows building+testing of an externally-threaded library variant (on any
// platform that supports pthreads). Here, an 'externally-threaded' library
// variant is one where the implementation of the libc++ thread api is provided
// as a separate library.
#define _LIBCPP_HAS_THREAD_API_EXTERNAL_PTHREAD
#endif
#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) && \
__libcpp_has_include(<__external_threading>)
#include <__external_threading>
#else
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) || \
defined(_LIBCPP_HAS_THREAD_API_EXTERNAL_PTHREAD)
#include <pthread.h>
#include <sched.h>
#endif
@@ -45,7 +57,8 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) || \
defined(_LIBCPP_HAS_THREAD_API_EXTERNAL_PTHREAD)
// Mutex
typedef pthread_mutex_t __libcpp_mutex_t;
#define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
@@ -134,7 +147,8 @@ void *__libcpp_tls_get(__libcpp_tls_key __key);
_LIBCPP_THREAD_ABI_VISIBILITY
void __libcpp_tls_set(__libcpp_tls_key __key, void *__p);
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) || \
defined(_LIBCPP_BUILDING_THREAD_API_EXTERNAL_PTHREAD)
int __libcpp_recursive_mutex_init(__libcpp_mutex_t *__m)
{

2
test/support/external_threads.cpp
View File

@@ -6,5 +6,5 @@
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#define _LIBCPP_HAS_THREAD_API_PTHREAD
#define _LIBCPP_BUILDING_THREAD_API_EXTERNAL_PTHREAD
#include <__threading_support>