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diff --git a/boost/asio/impl/io_service.ipp b/boost/asio/impl/io_service.ipp
new file mode 100644
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+++ b/boost/asio/impl/io_service.ipp
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+//
+// impl/io_service.ipp
+// ~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2012 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_IO_SERVICE_IPP
+#define BOOST_ASIO_IMPL_IO_SERVICE_IPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+#include <boost/limits.hpp>
+#include <boost/asio/io_service.hpp>
+#include <boost/asio/detail/scoped_ptr.hpp>
+#include <boost/asio/detail/service_registry.hpp>
+#include <boost/asio/detail/throw_error.hpp>
+
+#if defined(BOOST_ASIO_HAS_IOCP)
+# include <boost/asio/detail/win_iocp_io_service.hpp>
+#else
+# include <boost/asio/detail/task_io_service.hpp>
+#endif
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+
+io_service::io_service()
+  : service_registry_(new boost::asio::detail::service_registry(
+        *this, static_cast<impl_type*>(0),
+        (std::numeric_limits<std::size_t>::max)())),
+    impl_(service_registry_->first_service<impl_type>())
+{
+}
+
+io_service::io_service(std::size_t concurrency_hint)
+  : service_registry_(new boost::asio::detail::service_registry(
+        *this, static_cast<impl_type*>(0), concurrency_hint)),
+    impl_(service_registry_->first_service<impl_type>())
+{
+}
+
+io_service::~io_service()
+{
+  delete service_registry_;
+}
+
+std::size_t io_service::run()
+{
+  boost::system::error_code ec;
+  std::size_t s = impl_.run(ec);
+  boost::asio::detail::throw_error(ec);
+  return s;
+}
+
+std::size_t io_service::run(boost::system::error_code& ec)
+{
+  return impl_.run(ec);
+}
+
+std::size_t io_service::run_one()
+{
+  boost::system::error_code ec;
+  std::size_t s = impl_.run_one(ec);
+  boost::asio::detail::throw_error(ec);
+  return s;
+}
+
+std::size_t io_service::run_one(boost::system::error_code& ec)
+{
+  return impl_.run_one(ec);
+}
+
+std::size_t io_service::poll()
+{
+  boost::system::error_code ec;
+  std::size_t s = impl_.poll(ec);
+  boost::asio::detail::throw_error(ec);
+  return s;
+}
+
+std::size_t io_service::poll(boost::system::error_code& ec)
+{
+  return impl_.poll(ec);
+}
+
+std::size_t io_service::poll_one()
+{
+  boost::system::error_code ec;
+  std::size_t s = impl_.poll_one(ec);
+  boost::asio::detail::throw_error(ec);
+  return s;
+}
+
+std::size_t io_service::poll_one(boost::system::error_code& ec)
+{
+  return impl_.poll_one(ec);
+}
+
+void io_service::stop()
+{
+  impl_.stop();
+}
+
+bool io_service::stopped() const
+{
+  return impl_.stopped();
+}
+
+void io_service::reset()
+{
+  impl_.reset();
+}
+
+void io_service::notify_fork(boost::asio::io_service::fork_event event)
+{
+  service_registry_->notify_fork(event);
+}
+
+io_service::service::service(boost::asio::io_service& owner)
+  : owner_(owner),
+    next_(0)
+{
+}
+
+io_service::service::~service()
+{
+}
+
+void io_service::service::fork_service(boost::asio::io_service::fork_event)
+{
+}
+
+service_already_exists::service_already_exists()
+  : std::logic_error("Service already exists.")
+{
+}
+
+invalid_service_owner::invalid_service_owner()
+  : std::logic_error("Invalid service owner.")
+{
+}
+
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_IMPL_IO_SERVICE_IPP