Re: [Haskell-cafe] Getting the 'ThreadId' of the calling thread
Other actions such as withLinksDo and forkLinkIO' insert stuff into
threadMap. It can be non-mepty.
Thanks (again), Albert. Later, I found this comment above the
'withLinksDo' function: It is an error to call this function outside
the main thread, or to call any other functions in this module outside
this function.
Here's the simplest example that doesn't return the exception:
instance Show ThreadId where
show (Tid u) = show . hashUnique $ u
main = do
tid - C.myThreadId
tid' - fmap Tid newUnique
modifyMVar_ threadMap $ \tm -
return $ tm { state = M.singleton tid
$ ThreadState { ident = tid'
, signal= defaultSignal tid
, links = S.empty
, monitors = M.empty
, ownedMons = S.empty } }
myThreadId
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Re: [Haskell-cafe] Getting the 'ThreadId' of the calling thread
On 13-07-29 08:35 AM, Nikita Karetnikov wrote: I feel that a 'myThreadId' action, which is defined in this module [1], is useless, but I'm not sure. I think it will always return the Map.find: element not in the map exception because a 'threadMap' contains an empty 'ThreadMap'. Is it right, or am I missing something? Other actions such as withLinksDo and forkLinkIO' insert stuff into threadMap. It can be non-mepty. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Getting the 'ThreadId' of the calling thread
(I'm trying to update a package that was written with GHC 6.10.4 in mind.) I feel that a 'myThreadId' action, which is defined in this module [1], is useless, but I'm not sure. I think it will always return the Map.find: element not in the map exception because a 'threadMap' contains an empty 'ThreadMap'. Is it right, or am I missing something? [1] https://gitweb.torproject.org/tordnsel.git/blob/HEAD:/src/TorDNSEL/Control/Concurrent/Link/Internals.hs pgpDV3Pyy5Laq.pgp Description: PGP signature ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
