Re: [Haskell-cafe] How can I avoid buffered reads?

On 9 December 2012 10:29, Leon Smith wrote:

On Thu, Dec 6, 2012 at 5:23 PM, Brandon Allbery wro\

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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-Con... Bas