The documentation is a little confusing on this issue. It sounded to
me when I read the documentation that all of the *OS* threads were
blocked by the FFI, when what was meant was that all of the *IO* threads
assigned to the calling OS thread are what is blocked, because the docs
just say that "threads" are blocked without being clear that they are
only referring to a particular subset of the threads.
Cheers,
Greg
On 8/4/10 8:31 PM, Brandon S Allbery KF8NH wrote:
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On 8/4/10 17:16 , Andrew Coppin wrote:
I have a vague recollection of there being a situation to do with calling
foreign code that makes all Haskell threads block in the non-threaded RTS,
but not in the threaded one. Depending on how big your send and receive
Well, yes. This should be obvious; code invoked via the FFI can't be
cooperatively multitasked by the Haskell runtime (how would you accomplish
this? Think about it), and preemptive multitasking is only possible via OS
threads.
- --
brandon s. allbery [linux,solaris,freebsd,perl] allb...@kf8nh.com
system administrator [openafs,heimdal,too many hats] allb...@ece.cmu.edu
electrical and computer engineering, carnegie mellon university KF8NH
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