Added thirdparty: boost library

thirdparty/include/boost/atomic/ipc_atomic_flag.hpp

@@ -0,0 +1,40 @@
+/*
+ * 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)
+ *
+ * Copyright (c) 2020 Andrey Semashev
+ */
+/*!
+ * \file   atomic/ipc_atomic_flag.hpp
+ *
+ * This header contains definition of \c ipc_atomic_flag.
+ */
+
+#ifndef BOOST_ATOMIC_IPC_ATOMIC_FLAG_HPP_INCLUDED_
+#define BOOST_ATOMIC_IPC_ATOMIC_FLAG_HPP_INCLUDED_
+
+#include <boost/atomic/capabilities.hpp>
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/atomic_flag_impl.hpp>
+#include <boost/atomic/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+namespace atomics {
+
+//! Atomic flag for inter-process communication
+typedef atomics::detail::atomic_flag_impl< true > ipc_atomic_flag;
+
+} // namespace atomics
+
+using atomics::ipc_atomic_flag;
+
+} // namespace boost
+
+#include <boost/atomic/detail/footer.hpp>
+
+#endif // BOOST_ATOMIC_IPC_ATOMIC_FLAG_HPP_INCLUDED_