On Mon, Nov 28, 2005 at 11:27:46PM +0000, Joel Reymont wrote:

Folks,

How would you implement a timed read from a channel with STM? I would like to return Timeout if nothing was read from a TChan in X ms.

Is this a basic two-thread timeout implementation or is there a more elegant way of implementing this using `orElse`?

Here is a basic two-thread implementation: http://www.haskell.org/pipermail/haskell-cafe/2005-January/008303.html The other approach I see is to create a TVar that would be updated with current time every 0.1 s (or something like that), but that would be rather inefficient. You could also create a time-out manager thread (with a priority queue, etc), so you don't have to spawn a thread for every timeout. Best regards Tomasz -- I am searching for a programmer who is good at least in some of [Haskell, ML, C++, Linux, FreeBSD, math] for work in Warsaw, Poland