Jason Dusek
I would like to use evented I/O for a proxying application. My present thinking is to fork a thread for each new connection and then to wait for data on either socket in this thread, writing to one or the other socket as needed.
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Ideally, I'd get something like select() on handles, just saying whether there are bytes or not. However, I haven't managed to find anything like that in the standard libraries.
I don't think you want either of the functions you mentioned. What you probably want instead is to do concurrent programming by creating Haskell threads. A hundred Haskell threads reading from Handles are translated to one or more OS threads using whatever polling mechanism (select(), poll(), epoll) your operating system supports. I have uploaded a simple concurrent echo server implementation to hpaste [1]. It uses one thread for the stdout logger, one thread for the server, one thread for each client and finally a main thread waiting for you to hit enter to quit the application. [1] http://hpaste.org/52742 - Concurrent echo server with logger Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/