update boost on linux

linx64/include/boost/asio/buffered_stream.hpp

@@ -2,7 +2,7 @@
 // buffered_stream.hpp
 // ~~~~~~~~~~~~~~~~~~~
 //
-// Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+// 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)
@@ -23,7 +23,6 @@
 #include <boost/asio/buffered_stream_fwd.hpp>
 #include <boost/asio/detail/noncopyable.hpp>
 #include <boost/asio/error.hpp>
-#include <boost/asio/io_service.hpp>
 
 #include <boost/asio/detail/push_options.hpp>
 
@@ -53,6 +52,9 @@ public:
   /// The type of the lowest layer.
   typedef typename next_layer_type::lowest_layer_type lowest_layer_type;
 
+  /// The type of the executor associated with the object.
+  typedef typename lowest_layer_type::executor_type executor_type;
+
   /// Construct, passing the specified argument to initialise the next layer.
   template <typename Arg>
   explicit buffered_stream(Arg& a)
@@ -88,10 +90,10 @@ public:
     return stream_impl_.lowest_layer();
   }
 
-  /// Get the io_service associated with the object.
-  boost::asio::io_service& get_io_service()
+  /// Get the executor associated with the object.
+  executor_type get_executor() BOOST_ASIO_NOEXCEPT
   {
-    return stream_impl_.get_io_service();
+    return stream_impl_.lowest_layer().get_executor();
   }
 
   /// Close the stream.
@@ -101,9 +103,10 @@ public:
   }
 
   /// Close the stream.
-  boost::system::error_code close(boost::system::error_code& ec)
+  BOOST_ASIO_SYNC_OP_VOID close(boost::system::error_code& ec)
   {
-    return stream_impl_.close(ec);
+    stream_impl_.close(ec);
+    BOOST_ASIO_SYNC_OP_VOID_RETURN(ec);
   }
 
   /// Flush all data from the buffer to the next layer. Returns the number of