Note that killing the main thread will also kill all other threads. See:
http://haskell.org/ghc/docs/6.12.1/html/libraries/base-4.2.0.0/Control-Concurrent.html#11
You can use my threads library to wait on a child thread and possibly
re-raise an exception that was thrown in or to it:
Hi!
On Tue, Sep 14, 2010 at 11:46 PM, Bas van Dijk v.dijk@gmail.com wrote:
Note that killing the main thread will also kill all other threads. See:
Yes. But how does those other threads have time to cleanup is my question.
You can use my threads library to wait on a child thread and
Mitar mmi...@gmail.com writes:
Hi!
On Tue, Sep 14, 2010 at 11:46 PM, Bas van Dijk v.dijk@gmail.com wrote:
Note that killing the main thread will also kill all other threads. See:
Yes. But how does those other threads have time to cleanup is my question.
What we do in Snap is this: the
Don't forget to block asynchronous exception _before_ you fork in:
tid - forkIO (someWorkToDo `finally` putMVar mv ())
Otherwise an asynchronous exception might be thrown to the thread
_before_ the 'putMVar mv ()' exception handler is installed leaving
your main thread in a dead-lock!
Bas van Dijk v.dijk@gmail.com writes:
Don't forget to block asynchronous exception _before_ you fork in:
tid - forkIO (someWorkToDo `finally` putMVar mv ())
Otherwise an asynchronous exception might be thrown to the thread
_before_ the 'putMVar mv ()' exception handler is
Also don't forget to unblock asynchronous exceptions inside
'someWorkToDo' otherwise you can't throw exceptions to the thread.
Note that 'finally' unblocks asynchronous exceptions but I consider
this a bug. In the upcoming base library this is fixed[1] but I would
advise to fix the code right now
