Initial Commit

include/asio/detail/wrapped_handler.hpp

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+//
+// detail/wrapped_handler.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2025 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 ASIO_DETAIL_WRAPPED_HANDLER_HPP
+#define ASIO_DETAIL_WRAPPED_HANDLER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/bind_handler.hpp"
+#include "asio/detail/handler_cont_helpers.hpp"
+#include "asio/detail/initiate_dispatch.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+struct is_continuation_delegated
+{
+  template <typename Dispatcher, typename Handler>
+  bool operator()(Dispatcher&, Handler& handler) const
+  {
+    return asio_handler_cont_helpers::is_continuation(handler);
+  }
+};
+
+struct is_continuation_if_running
+{
+  template <typename Dispatcher, typename Handler>
+  bool operator()(Dispatcher& dispatcher, Handler&) const
+  {
+    return dispatcher.running_in_this_thread();
+  }
+};
+
+template <typename Dispatcher, typename = void>
+struct wrapped_executor
+{
+  typedef Dispatcher executor_type;
+
+  static const Dispatcher& get(const Dispatcher& dispatcher) noexcept
+  {
+    return dispatcher;
+  }
+};
+
+template <typename Dispatcher>
+struct wrapped_executor<Dispatcher,
+    void_type<typename Dispatcher::executor_type>>
+{
+  typedef typename Dispatcher::executor_type executor_type;
+
+  static executor_type get(const Dispatcher& dispatcher) noexcept
+  {
+    return dispatcher.get_executor();
+  }
+};
+
+template <typename Dispatcher, typename Handler,
+    typename IsContinuation = is_continuation_delegated>
+class wrapped_handler
+{
+public:
+  typedef void result_type;
+  typedef typename wrapped_executor<Dispatcher>::executor_type executor_type;
+
+  wrapped_handler(Dispatcher dispatcher, Handler& handler)
+    : dispatcher_(dispatcher),
+      handler_(static_cast<Handler&&>(handler))
+  {
+  }
+
+  wrapped_handler(const wrapped_handler& other)
+    : dispatcher_(other.dispatcher_),
+      handler_(other.handler_)
+  {
+  }
+
+  wrapped_handler(wrapped_handler&& other)
+    : dispatcher_(other.dispatcher_),
+      handler_(static_cast<Handler&&>(other.handler_))
+  {
+  }
+
+  executor_type get_executor() const noexcept
+  {
+    return wrapped_executor<Dispatcher>::get(dispatcher_);
+  }
+
+  void operator()()
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(static_cast<Handler&&>(handler_));
+  }
+
+  void operator()() const
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(handler_);
+  }
+
+  template <typename Arg1>
+  void operator()(const Arg1& arg1)
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(detail::bind_handler(handler_, arg1));
+  }
+
+  template <typename Arg1>
+  void operator()(const Arg1& arg1) const
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(detail::bind_handler(handler_, arg1));
+  }
+
+  template <typename Arg1, typename Arg2>
+  void operator()(const Arg1& arg1, const Arg2& arg2)
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(detail::bind_handler(handler_, arg1, arg2));
+  }
+
+  template <typename Arg1, typename Arg2>
+  void operator()(const Arg1& arg1, const Arg2& arg2) const
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(detail::bind_handler(handler_, arg1, arg2));
+  }
+
+  template <typename Arg1, typename Arg2, typename Arg3>
+  void operator()(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3)
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(detail::bind_handler(handler_, arg1, arg2, arg3));
+  }
+
+  template <typename Arg1, typename Arg2, typename Arg3>
+  void operator()(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3) const
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(detail::bind_handler(handler_, arg1, arg2, arg3));
+  }
+
+  template <typename Arg1, typename Arg2, typename Arg3, typename Arg4>
+  void operator()(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
+      const Arg4& arg4)
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(
+          detail::bind_handler(handler_, arg1, arg2, arg3, arg4));
+  }
+
+  template <typename Arg1, typename Arg2, typename Arg3, typename Arg4>
+  void operator()(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
+      const Arg4& arg4) const
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(
+          detail::bind_handler(handler_, arg1, arg2, arg3, arg4));
+  }
+
+  template <typename Arg1, typename Arg2, typename Arg3, typename Arg4,
+      typename Arg5>
+  void operator()(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
+      const Arg4& arg4, const Arg5& arg5)
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(
+          detail::bind_handler(handler_, arg1, arg2, arg3, arg4, arg5));
+  }
+
+  template <typename Arg1, typename Arg2, typename Arg3, typename Arg4,
+      typename Arg5>
+  void operator()(const Arg1& arg1, const Arg2& arg2, const Arg3& arg3,
+      const Arg4& arg4, const Arg5& arg5) const
+  {
+    detail::initiate_dispatch_with_executor<executor_type>(
+        this->get_executor())(
+          detail::bind_handler(handler_, arg1, arg2, arg3, arg4, arg5));
+  }
+
+//private:
+  Dispatcher dispatcher_;
+  Handler handler_;
+};
+
+template <typename Dispatcher, typename Handler, typename IsContinuation>
+inline bool asio_handler_is_continuation(
+    wrapped_handler<Dispatcher, Handler, IsContinuation>* this_handler)
+{
+  return IsContinuation()(this_handler->dispatcher_, this_handler->handler_);
+}
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_DETAIL_WRAPPED_HANDLER_HPP