Added thirdparty: boost library

thirdparty/include/boost/cobalt/run.hpp

@@ -0,0 +1,61 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+//
+// 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_RUN_HPP
+#define BOOST_COBALT_RUN_HPP
+
+#include <boost/cobalt/spawn.hpp>
+#include <boost/cobalt/task.hpp>
+
+#include <boost/asio/use_future.hpp>
+
+namespace boost::cobalt
+{
+
+template<typename T>
+T run(task<T> t)
+{
+#if !defined(BOOST_COBALT_NO_PMR)
+  pmr::unsynchronized_pool_resource root_resource{this_thread::get_default_resource()};
+    struct reset_res
+    {
+        void operator()(pmr::memory_resource * res)
+        {
+            this_thread::set_default_resource(res);
+        }
+    };
+    std::unique_ptr<pmr::memory_resource, reset_res> pr{
+            boost::cobalt::this_thread::set_default_resource(&root_resource)};
+#endif
+    std::future<T> f;
+    {
+      asio::io_context ctx{BOOST_ASIO_CONCURRENCY_HINT_1};
+      struct reset_exec
+      {
+        std::optional<executor> exec;
+
+        reset_exec()
+        {
+          if (this_thread::has_executor())
+            exec = this_thread::get_executor();
+        }
+
+        ~reset_exec()
+        {
+          if (exec)
+            this_thread::set_executor(*exec);
+        }
+      };
+
+      reset_exec re;
+      this_thread::set_executor(ctx.get_executor());
+      f = spawn(ctx, std::move(t), asio::bind_executor(ctx.get_executor(), asio::use_future));
+      ctx.run();
+    }
+    return f.get();
+}
+
+}
+
+#endif //BOOST_COBALT_RUN_HPP