Added thirdparty: boost library

thirdparty/include/boost/cobalt/detail/this_thread.hpp

@@ -0,0 +1,64 @@
+//
+// Copyright (c) 2022 Klemens Morgenstern (klemens.morgenstern@gmx.net)
+//
+// 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)
+//
+
+#ifndef BOOST_COBALT_DETAIL_THIS_THREAD_HPP
+#define BOOST_COBALT_DETAIL_THIS_THREAD_HPP
+
+#include <boost/cobalt/this_thread.hpp>
+
+#include <boost/asio/uses_executor.hpp>
+#include <boost/mp11/algorithm.hpp>
+
+namespace boost::cobalt::detail
+{
+
+inline executor
+extract_executor(executor exec) { return exec; }
+
+#if defined(BOOST_COBALT_CUSTOM_EXECUTOR) || defined(BOOST_COBALT_USE_IO_CONTEXT)
+BOOST_COBALT_DECL executor
+extract_executor(asio::any_io_executor exec);
+#endif
+
+template<typename ... Args>
+executor get_executor_from_args(Args &&... args)
+{
+  using args_type = mp11::mp_list<std::decay_t<Args>...>;
+  constexpr static auto I = mp11::mp_find<args_type, asio::executor_arg_t>::value;
+  if constexpr (sizeof...(Args) == I)
+    return this_thread::get_executor();
+  else  //
+    return extract_executor(std::get<I + 1u>(std::tie(args...)));
+}
+
+#if !defined(BOOST_COBALT_NO_PMR)
+template<typename ... Args>
+pmr::memory_resource * get_memory_resource_from_args(Args &&... args)
+{
+  using args_type = mp11::mp_list<std::decay_t<Args>...>;
+  constexpr static auto I = mp11::mp_find<args_type, std::allocator_arg_t>::value;
+  if constexpr (sizeof...(Args) == I)
+    return this_thread::get_default_resource();
+  else  //
+    return std::get<I + 1u>(std::tie(args...)).resource();
+}
+
+template<typename ... Args>
+pmr::memory_resource * get_memory_resource_from_args_global(Args &&... args)
+{
+  using args_type = mp11::mp_list<std::decay_t<Args>...>;
+  constexpr static auto I = mp11::mp_find<args_type, std::allocator_arg_t>::value;
+  if constexpr (sizeof...(Args) == I)
+    return pmr::get_default_resource();
+  else  //
+    return std::get<I + 1u>(std::tie(args...)).resource();
+}
+#endif
+
+}
+
+#endif //BOOST_COBALT_DETAIL_THIS_THREAD_HPP