[Haskell-cafe] Re: Waiting for thread to finish
Brandon S. Allbery KF8NH
allbery at ece.cmu.edu
Thu Nov 29 14:00:31 EST 2007
On Nov 29, 2007, at 13:38 , Andrew Coppin wrote:
> Bryan O'Sullivan wrote:
>> But wait, there's more! If you're using the threaded RTS, you
>> often need to know how many threads you can run concurrently, for
>> example to explicitly split up a compute-bound task. This value
>> is exposed at runtime by the numCapabilities variable in the
>> GHC.Conc module.
>> This variable is new in GHC 6.8.1 (thanks, Simon!), so don't try
>> to use it with an older release.
> Hmm... I was *sure* this was exposed in Control.Concurrent
> already... but, apparently, no. It seems you can only get at it
> from GHC.Conc. That's kind of a pitty... oh well! ;-)
It's internal implementation foo; why would it be part of an
interface intended to be reasonably portable?
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university KF8NH
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