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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/asio/handler_invoke_hook.hpp
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+//
+// handler_invoke_hook.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2008 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_HANDLER_INVOKE_HOOK_HPP
+#define BOOST_ASIO_HANDLER_INVOKE_HOOK_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+
+/// Default invoke function for handlers.
+/**
+ * Completion handlers for asynchronous operations are invoked by the
+ * io_service associated with the corresponding object (e.g. a socket or
+ * deadline_timer). Certain guarantees are made on when the handler may be
+ * invoked, in particular that a handler can only be invoked from a thread that
+ * is currently calling boost::asio::io_service::run() on the corresponding
+ * io_service object. Handlers may subsequently be invoked through other
+ * objects (such as boost::asio::strand objects) that provide additional
+ * guarantees.
+ *
+ * When asynchronous operations are composed from other asynchronous
+ * operations, all intermediate handlers should be invoked using the same
+ * method as the final handler. This is required to ensure that user-defined
+ * objects are not accessed in a way that may violate the guarantees. This
+ * hooking function ensures that the invoked method used for the final handler
+ * is accessible at each intermediate step.
+ *
+ * Implement asio_handler_invoke for your own handlers to specify a custom
+ * invocation strategy.
+ *
+ * This default implementation is simply:
+ * @code
+ * function();
+ * @endcode
+ *
+ * @par Example
+ * @code
+ * class my_handler;
+ *
+ * template <typename Function>
+ * void asio_handler_invoke(Function function, my_handler* context)
+ * {
+ * context->strand_.dispatch(function);
+ * }
+ * @endcode
+ */
+template <typename Function>
+inline void asio_handler_invoke(Function function, ...)
+{
+ function();
+}
+
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_HANDLER_INVOKE_HOOK_HPP