2. call waitForProcess; when it completes, kill the other thread(s)
does this work? In GHC docs for killThread/throwTo it says:
If the target thread is currently making a foreign call, then the exception will not be raised (and hence throwTo will not return) until the call has completed.
Well, I haven't tried it, like I said. I guess it depends on whether waitForProcess is implemented with an FFI call. Note that this blocking behaviour (exception blocked until FFI call returns) only seems to be with -threaded; with the normal RTS, the exception is raised (although what happens to the OS thread is not clear; I guess it still runs). At least, that's my experience on Win XP with GHC-6.6. Alistair ***************************************************************** Confidentiality Note: The information contained in this message, and any attachments, may contain confidential and/or privileged material. It is intended solely for the person(s) or entity to which it is addressed. Any review, retransmission, dissemination, or taking of any action in reliance upon this information by persons or entities other than the intended recipient(s) is prohibited. If you received this in error, please contact the sender and delete the material from any computer. *****************************************************************