On 9 December 2012 10:29, Leon Smith <leon.p.sm...@gmail.com> wrote: > On Thu, Dec 6, 2012 at 5:23 PM, Brandon Allbery <allber...@gmail.com> wro\ >> >> Both should be cdevs, not files, so they do not go through the normal >> filesystem I/O pathway in the kernel and should support select()/poll(). >> ("ls -l", the first character should be "c" instead of "-" indicating >> character-mode device nodes.) If ghc is not detecting that, then *that* is >> indeed an I/O manager issue. > > > The issue here is that if you look at the source of fdReadBuf, you see that > it's a plain system call without any reference to GHC's (relatively new) IO > manager.
What if you use threadWaitRead on the fd before you read from it? http://hackage.haskell.org/packages/archive/base/latest/doc/html/Control-Concurrent.html#v:threadWaitRead Bas _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe