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POHow to design a custom IO object for Boost.Asio
 

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  1. POHow to design a custom IO object for Boost.Asio
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    <p>I have an base class (DeviceBase) representing an embedded device, with which I want to communicate. The device can be accessed in various ways, including USB and TCP sockets. Additionally, there is a mock implementation which works on files.</p> <p>Until now, I have only used synchronous read/write calls, and all the implementations are simply classes derived from the base class, overriding the read/write functions. This allows me to use polymorphic pointers and containers to provide implementation-independent access to the device to the application's logic.</p> <p>Now i want to use Boost.Asio to enable simple async IO. I have found this guide <a href="http://www.highscore.de/cpp/boost/asio.html" rel="nofollow">http://www.highscore.de/cpp/boost/asio.html</a> describing how to write your own extensions, but it is quite simplified, and I have stumbled upon some issues which aren't discussed there.</p> <ul> <li><p>Currently, all my implementations have different constructors (obviously, because of the different ways of addressing/initializing the device connection). The implementation class presented in the guide is constructed by the io_service, which means, the user can't pass arguments to the constructor.</p></li> <li><p>The example in the guide provides a template class in the form of <code>custom_io_object&lt;implementation&gt;</code>, which would prevent the usage of polymorphic pointers, because now there is no common base class to the different kinds of IO objects.</p></li> </ul> <p>Is there any form of documentation, or any books which discuss the design of Boost.Asio extensions? Do I overlook something?</p>
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    1. COYou can implement wrapper classes for TCP/SSL/UDP/Serial to have interface independent design as you desire...
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