Update boost to 1.71 and add asio

boost/asio/impl/dispatch.hpp

@@ -0,0 +1,93 @@
+//
+// impl/dispatch.hpp
+// ~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// 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_ASIO_IMPL_DISPATCH_HPP
+#define BOOST_ASIO_IMPL_DISPATCH_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+#include <boost/asio/associated_allocator.hpp>
+#include <boost/asio/associated_executor.hpp>
+#include <boost/asio/detail/work_dispatcher.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+struct initiate_dispatch
+{
+  template <typename CompletionHandler>
+  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler) const
+  {
+    typedef typename decay<CompletionHandler>::type DecayedHandler;
+
+    typename associated_executor<DecayedHandler>::type ex(
+        (get_associated_executor)(handler));
+
+    typename associated_allocator<DecayedHandler>::type alloc(
+        (get_associated_allocator)(handler));
+
+    ex.dispatch(BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler), alloc);
+  }
+
+  template <typename CompletionHandler, typename Executor>
+  void operator()(BOOST_ASIO_MOVE_ARG(CompletionHandler) handler,
+      BOOST_ASIO_MOVE_ARG(Executor) ex) const
+  {
+    typedef typename decay<CompletionHandler>::type DecayedHandler;
+
+    typename associated_allocator<DecayedHandler>::type alloc(
+        (get_associated_allocator)(handler));
+
+    ex.dispatch(detail::work_dispatcher<DecayedHandler>(
+          BOOST_ASIO_MOVE_CAST(CompletionHandler)(handler)), alloc);
+  }
+};
+
+} // namespace detail
+
+template <typename CompletionToken>
+BOOST_ASIO_INITFN_RESULT_TYPE(CompletionToken, void()) dispatch(
+    BOOST_ASIO_MOVE_ARG(CompletionToken) token)
+{
+  return async_initiate<CompletionToken, void()>(
+      detail::initiate_dispatch(), token);
+}
+
+template <typename Executor, typename CompletionToken>
+BOOST_ASIO_INITFN_RESULT_TYPE(CompletionToken, void()) dispatch(
+    const Executor& ex, BOOST_ASIO_MOVE_ARG(CompletionToken) token,
+    typename enable_if<is_executor<Executor>::value>::type*)
+{
+  return async_initiate<CompletionToken, void()>(
+      detail::initiate_dispatch(), token, ex);
+}
+
+template <typename ExecutionContext, typename CompletionToken>
+inline BOOST_ASIO_INITFN_RESULT_TYPE(CompletionToken, void()) dispatch(
+    ExecutionContext& ctx, BOOST_ASIO_MOVE_ARG(CompletionToken) token,
+    typename enable_if<is_convertible<
+      ExecutionContext&, execution_context&>::value>::type*)
+{
+  return (dispatch)(ctx.get_executor(),
+      BOOST_ASIO_MOVE_CAST(CompletionToken)(token));
+}
+
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_IMPL_DISPATCH_HPP