mergeIO, -- :: [a] -> [a] -> IO [a]
nmergeIO, -- :: [[a]] -> IO [a]
mergeIO, -- :: [a] -> [a] -> IO [a]
nmergeIO, -- :: [[a]] -> IO [a]
Concurrency is \"lightweight\", which means that both thread creation
and context switching overheads are extremely low. Scheduling of
Haskell threads is done internally in the Haskell runtime system, and
Concurrency is \"lightweight\", which means that both thread creation
and context switching overheads are extremely low. Scheduling of
Haskell threads is done internally in the Haskell runtime system, and
Haskell threads can communicate via 'MVar's, a kind of synchronised
mutable variable (see "Control.Concurrent.MVar"). Several common
Haskell threads can communicate via 'MVar's, a kind of synchronised
mutable variable (see "Control.Concurrent.MVar"). Several common
> where write c = putChar c >> write c
will print either @aaaaaaaaaaaaaa...@ or @bbbbbbbbbbbb...@,
> where write c = putChar c >> write c
will print either @aaaaaaaaaaaaaa...@ or @bbbbbbbbbbbb...@,
Calling a foreign C procedure (such as @getchar@) that blocks waiting
for input will block /all/ threads, unless the @threadsafe@ attribute
is used on the foreign call (and your compiler \/ operating system
Calling a foreign C procedure (such as @getchar@) that blocks waiting
for input will block /all/ threads, unless the @threadsafe@ attribute
is used on the foreign call (and your compiler \/ operating system
to the locking on a 'Handle'. Only one thread
may hold the lock on a 'Handle' at any one
time, so if a reschedule happens while a thread is holding the
to the locking on a 'Handle'. Only one thread
may hold the lock on a 'Handle' at any one
time, so if a reschedule happens while a thread is holding the
the switch from @aaaa@ to
@bbbbb@ happens infrequently. It can be
improved by lowering the reschedule tick period. We also have a
patch that causes a reschedule whenever a thread waiting on a
the switch from @aaaa@ to
@bbbbb@ happens infrequently. It can be
improved by lowering the reschedule tick period. We also have a
patch that causes a reschedule whenever a thread waiting on a