[Haskell-cafe] Re: all threads are blocked by recvFrom

Vitaliy Akimov vitaliy.akimov at gmail.com
Fri Mar 14 10:43:15 EDT 2008

Rebuilding of the network package with changed safety helped but I
don't think this is the solution. BTW accept is declared as safe. What
is the reason of declaring recvFrom as unsafe?  I think this breaks
highly required feature. Apparently it's impossible to make concurrent
server for non connection based protocols.

2008/3/14, Vitaliy Akimov <vitaliy.akimov at gmail.com>:
> Hello, I have a problem with building multithreaded UDP server. If
>  main thread is waiting for new request in recvFrom all other threads
>  are blocked too. I've checked every variant with
>  forkIO,forkOS,-threaded etc, nothing's helped.  After reading GHC docs
>  I've understood this is happened becouse foreign function call from
>  recvFrom (network library) is marked to be unsefe, so it's execution
>  blocks every other thread.  How can I resolve it?
>  Thank you.
> Vitaliy.

More information about the Haskell-Cafe mailing list