On 1/14/12 6:27 AM, Daniel Waterworth wrote:
p.s I'd avoid the TChan for networking code as reading from a TChan is a busy operation. [1]
[1] http://hackage.haskell.org/packages/archive/stm/2.2.0.1/doc/html/src/Control...
The `retry`-ness will be rectified whenever the new version of stm is pushed out[1], which includes tryReadTChan for one-shot use. Until then, you can use the version of tryReadTChan in stm-chans[2] which provides the same operation, though less optimized since it's not behind the API wall. Once I learn the version number of when the optimized variants will be released, the stm-chans version will use CPP to properly select between the new version vs the backport, so you can rely on stm-chans to provide a compatibility layer for those operations. [1] http://www.haskell.org/pipermail/cvs-libraries/2011-April/012914.html [2] http://hackage.haskell.org/packages/archive/stm-chans/1.1.0/doc/html/src/Con... -- Live well, ~wren