Update libcxx to 18 Dec 3b0705827dbe711788c6b6bec3afa94205db1ce8

commit_hash:875d8582c26b8bf016af25e00ad77d9bbf081948

1 files changed, 2 insertions, 77 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/src/mutex.cpp b/contrib/libs/cxxsupp/libcxx/src/mutex.cpp
index e8637f9275..11f7be38e2 100644
--- a/contrib/libs/cxxsupp/libcxx/src/mutex.cpp
+++ b/contrib/libs/cxxsupp/libcxx/src/mutex.cpp
@@ -16,10 +16,8 @@
 #include "include/atomic_support.h"
 #endif
 
-#ifndef _LIBCPP_HAS_NO_THREADS
-#  if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB)
-#    pragma comment(lib, "pthread")
-#  endif
+#if defined(__ELF__) && defined(_LIBCPP_LINK_PTHREAD_LIB)
+#  pragma comment(lib, "pthread")
 #endif
 
 _LIBCPP_PUSH_MACROS
@@ -27,8 +25,6 @@ _LIBCPP_PUSH_MACROS
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#ifndef _LIBCPP_HAS_NO_THREADS
-
 // ~mutex is defined elsewhere
 
 void
@@ -191,77 +187,6 @@ recursive_timed_mutex::unlock() noexcept
     }
 }
 
-#endif // !_LIBCPP_HAS_NO_THREADS
-
-// If dispatch_once_f ever handles C++ exceptions, and if one can get to it
-// without illegal macros (unexpected macros not beginning with _UpperCase or
-// __lowercase), and if it stops spinning waiting threads, then call_once should
-// call into dispatch_once_f instead of here. Relevant radar this code needs to
-// keep in sync with:  7741191.
-
-#ifndef _LIBCPP_HAS_NO_THREADS
-static constinit __libcpp_mutex_t mut = _LIBCPP_MUTEX_INITIALIZER;
-static constinit __libcpp_condvar_t cv = _LIBCPP_CONDVAR_INITIALIZER;
-#endif
-
-#ifdef _LIBCPP_ABI_MICROSOFT
-void __call_once(volatile std::atomic<once_flag::_State_type>& flag, void* arg,
-                 void (*func)(void*))
-#else
-void __call_once(volatile once_flag::_State_type& flag, void* arg,
-                 void (*func)(void*))
-#endif
-{
-#if defined(_LIBCPP_HAS_NO_THREADS)
-
-    if (flag == once_flag::_Unset) {
-        auto guard = std::__make_exception_guard([&flag] { flag = once_flag::_Unset; });
-        flag = once_flag::_Pending;
-        func(arg);
-        flag = once_flag::_Complete;
-        guard.__complete();
-    }
-
-#else // !_LIBCPP_HAS_NO_THREADS
-
-    __libcpp_mutex_lock(&mut);
-    while (flag == once_flag::_Pending)
-        __libcpp_condvar_wait(&cv, &mut);
-    if (flag == once_flag::_Unset) {
-        auto guard = std::__make_exception_guard([&flag] {
-            __libcpp_mutex_lock(&mut);
-#ifdef _LIBCPP_ABI_MICROSOFT
-            flag.store(once_flag::_Unset);
-#else
-            __libcpp_relaxed_store(&flag, once_flag::_Unset);
-#endif
-            __libcpp_mutex_unlock(&mut);
-            __libcpp_condvar_broadcast(&cv);
-        });
-
-#ifdef _LIBCPP_ABI_MICROSOFT
-        flag.store(once_flag::_Pending, memory_order_relaxed);
-#else
-        __libcpp_relaxed_store(&flag, once_flag::_Pending);
-#endif
-        __libcpp_mutex_unlock(&mut);
-        func(arg);
-        __libcpp_mutex_lock(&mut);
-#ifdef _LIBCPP_ABI_MICROSOFT
-        flag.store(once_flag::_Complete, memory_order_release);
-#else
-        __libcpp_atomic_store(&flag, once_flag::_Complete, _AO_Release);
-#endif
-        __libcpp_mutex_unlock(&mut);
-        __libcpp_condvar_broadcast(&cv);
-        guard.__complete();
-    } else {
-        __libcpp_mutex_unlock(&mut);
-    }
-
-#endif // !_LIBCPP_HAS_NO_THREADS
-}
-
 _LIBCPP_END_NAMESPACE_STD
 
 _LIBCPP_POP_MACROS