[Haskell-cafe] ANNOUNCE: DSTM 0.1.1

Gregory Crosswhite gcross at phys.washington.edu
Thu Aug 5 00:47:01 EDT 2010

  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.


On 8/4/10 8:31 PM, Brandon S Allbery KF8NH wrote:
> Hash: SHA1
> 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]      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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