add boost on mac

macx64/include/boost/asio/detail/handler_work.hpp

@@ -0,0 +1,115 @@
+//
+// detail/handler_work.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_DETAIL_HANDLER_WORK_HPP
+#define BOOST_ASIO_DETAIL_HANDLER_WORK_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_executor.hpp>
+#include <boost/asio/detail/handler_invoke_helpers.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+// A helper class template to allow completion handlers to be dispatched
+// through either the new executors framework or the old invocaton hook. The
+// primary template uses the new executors framework.
+template <typename Handler,
+    typename IoExecutor = system_executor, typename HandlerExecutor
+      = typename associated_executor<Handler, IoExecutor>::type>
+class handler_work
+{
+public:
+  explicit handler_work(Handler& handler) BOOST_ASIO_NOEXCEPT
+    : io_executor_(),
+      executor_(boost::asio::get_associated_executor(handler, io_executor_))
+  {
+  }
+
+  handler_work(Handler& handler, const IoExecutor& io_ex) BOOST_ASIO_NOEXCEPT
+    : io_executor_(io_ex),
+      executor_(boost::asio::get_associated_executor(handler, io_executor_))
+  {
+  }
+
+  static void start(Handler& handler) BOOST_ASIO_NOEXCEPT
+  {
+    HandlerExecutor ex(boost::asio::get_associated_executor(handler));
+    ex.on_work_started();
+  }
+
+  static void start(Handler& handler,
+      const IoExecutor& io_ex) BOOST_ASIO_NOEXCEPT
+  {
+    HandlerExecutor ex(boost::asio::get_associated_executor(handler, io_ex));
+    ex.on_work_started();
+    io_ex.on_work_started();
+  }
+
+  ~handler_work()
+  {
+    io_executor_.on_work_finished();
+    executor_.on_work_finished();
+  }
+
+  template <typename Function>
+  void complete(Function& function, Handler& handler)
+  {
+    executor_.dispatch(BOOST_ASIO_MOVE_CAST(Function)(function),
+        boost::asio::get_associated_allocator(handler));
+  }
+
+private:
+  // Disallow copying and assignment.
+  handler_work(const handler_work&);
+  handler_work& operator=(const handler_work&);
+
+  IoExecutor io_executor_;
+  HandlerExecutor executor_;
+};
+
+// This specialisation dispatches a handler through the old invocation hook.
+// The specialisation is not strictly required for correctness, as the
+// system_executor will dispatch through the hook anyway. However, by doing
+// this we avoid an extra copy of the handler.
+template <typename Handler>
+class handler_work<Handler, system_executor, system_executor>
+{
+public:
+  explicit handler_work(Handler&) BOOST_ASIO_NOEXCEPT {}
+  static void start(Handler&) BOOST_ASIO_NOEXCEPT {}
+  ~handler_work() {}
+
+  template <typename Function>
+  void complete(Function& function, Handler& handler)
+  {
+    boost_asio_handler_invoke_helpers::invoke(function, handler);
+  }
+
+private:
+  // Disallow copying and assignment.
+  handler_work(const handler_work&);
+  handler_work& operator=(const handler_work&);
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_HANDLER_WORK_HPP