Ydb stable 22-4-2122.4.21

x-stable-origin-commit: e89099581237299a132feafb5b58af59ebd0468a

1 files changed, 60 insertions, 0 deletions

diff --git a/contrib/restricted/boost/libs/context/src/continuation.cpp b/contrib/restricted/boost/libs/context/src/continuation.cpp
new file mode 100644
index 00000000000..0779baaba87
--- /dev/null
+++ b/contrib/restricted/boost/libs/context/src/continuation.cpp
@@ -0,0 +1,60 @@
+
+//          Copyright Oliver Kowalke 2017.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#if defined(BOOST_USE_UCONTEXT)
+#include "boost/context/continuation_ucontext.hpp"
+#elif defined(BOOST_USE_WINFIB)
+#include "boost/context/continuation_winfib.hpp"
+#else
+#include "boost/context/execution_context.hpp"
+#endif
+
+#include <boost/config.hpp>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+namespace context {
+namespace detail {
+
+// zero-initialization
+thread_local activation_record * current_rec;
+thread_local static std::size_t counter;
+
+// schwarz counter
+activation_record_initializer::activation_record_initializer() noexcept {
+    if ( 0 == counter++) {
+        current_rec = new activation_record();
+    }
+}
+
+activation_record_initializer::~activation_record_initializer() {
+    if ( 0 == --counter) {
+        BOOST_ASSERT( current_rec->is_main_context() );
+        delete current_rec;
+    }
+}
+
+}
+
+namespace detail {
+
+activation_record *&
+activation_record::current() noexcept {
+    // initialized the first time control passes; per thread
+    thread_local static activation_record_initializer initializer;
+    return current_rec;
+}
+
+}
+
+}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+# include BOOST_ABI_SUFFIX
+#endif