Adding internal threading support for POSIX(OFF)

llvm · Feb 3, 2022 · 9ac3e12 · 9ac3e12
1 parent 607ffa5
commit 9ac3e12
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Showing 11 changed files with 516 additions and 14 deletions.
diff --git a/libcxx/include/__threading_support b/libcxx/include/__threading_support
@@ -252,7 +252,14 @@ int __libcpp_tls_set(__libcpp_tls_key __key, void *__p);
 #if (!defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) || \
      defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL))
 
-#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
+#if defined(_LIBCPP_HAS_THREAD_LIBRARY_OPTIONAL)
+// Empty - function definitions are provided by src/include/internal_threading_support.h
+#if !defined(_LIBCPP_BUILDING_LIBRARY)
+#error _LIBCPP_HAS_THREAD_LIBRARY_OPTIONAL is only intended to protect internal \
+       uses of __threading_support by libcxx.
+#endif
+
+#elif defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
 
 _LIBCPP_HIDE_FROM_ABI inline
 int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)

diff --git a/libcxx/src/CMakeLists.txt b/libcxx/src/CMakeLists.txt
@@ -18,6 +18,7 @@ set(LIBCXX_SOURCES
   include/apple_availability.h
   include/atomic_support.h
   include/config_elast.h
+  include/internal_threading_support.h
   include/refstring.h
   include/ryu/common.h
   include/ryu/d2fixed.h

diff --git a/libcxx/src/debug.cpp b/libcxx/src/debug.cpp
@@ -14,7 +14,7 @@
 #include "cstdio"
 #include "__hash_table"
 #ifndef _LIBCPP_HAS_NO_THREADS
-#include "mutex"
+#include "include/internal_threading_support.h"
 #if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB)
 #pragma comment(lib, "pthread")
 #endif