Example of building async active object

Here's more complex example of building communicating objects on the top of Boost.Asio (Boost C++ Libraries). https://sourceforge.net/projects/asio-samples/ (the most complete projects are "nmea_client" and "echo_server"). The main concept of the described method is creation of active objects tied to boost::asio::io_service (where theirs activity is done by means of working threads tied to io_service::run method) with asio-like communication interface:

template <typename Handler>
void async_do_something(operation_parameters, Handler handler) {...}

or even (see ma::nmea::cyclic_read_session::async_read_some):

template <typename Handler, typename Data>
void async_do_something(Data data, Handler handler) {...}

The central point of the suggested method is ma::handler_storage class which is used for handler's "parking" until the active method's execution flow completes. Also ma::handler_storage helps to decouple header files from cpp-files which in theory must help with compilation time reduction.

Updated: there is "async_basics2" project in "asio-samples". It discovers creation of Boost.Asio-based active object without templates (in public area of active object) - only using plain old interfaces but with support of Asio-like completion handler guaranties and custom memory allocation. I am more than confident that this "traditional" approach is looked for by many of Asio-users.

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Topic revision: r18 - 22 Mar 2011 - 16:12:43 - MaratAbrarov?
 
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