view release on metacpan or  search on metacpan

hugs98-Nov2003/libraries/Hugs/ConcBase.hs  view on Meta::CPAN

--   Context switches only occur when you use one of the primitives
--   defined in this module.  This means that programs such as:
-- 
--     main = forkIO (write 'a') >> write 'b'
-- 	where
-- 	 write c = putChar c >> write c
-- 
--   will print either "aaaaaaaaaaaaaa..." or "bbbbbbbbbbbb..."
--   instead of some random interleaving of 'a's and 'b's.
-- 
-- Cooperative multitasking is sufficient for writing coroutines and simple
-- graphical user interfaces but the usual assumptions of fairness don't
-- apply and Channel.getChanContents cannot be implemented.
-----------------------------------------------------------------------------
module Hugs.ConcBase(
	forkIO,
	MVar,
	newEmptyMVar, newMVar, takeMVar, tryTakeMVar, putMVar, tryPutMVar,
	isEmptyMVar,
        yield
	) where