7 Apr
2009
7 Apr
'09
11:40 a.m.
Hello Neil, Tuesday, April 7, 2009, 6:13:29 PM, you wrote:
Calls to System.Cmd.system, i.e. running external console processes. It's a make system I'm writing, so virtually all the time is spent in calls to ghc etc.
btw, if all that you need is to limit amount of simultaneous System.Cmd.system calls, you may go from opposite side: wrap this call into semaphore: sem = unsafePerformIO$ newQSem numCapabilities mysystem = bracket_ (waitQSem sem) (signalQSem sem) . system and implement para as simple thread population: para = mapM_ forkIO -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com