R
Size: a a a
R
DS
B
B
atomicModifyIORef :: IORef a -> (a -> (a, b)) -> IO b
DS
atomicModifyIORef :: IORef a -> (a -> (a, b)) -> IO b
-- This function is useful for using 'IORef' in a safe way in a multithreaded
-- program. If you only have one 'IORef', then using 'atomicModifyIORef' to
-- access and modify it will prevent race conditions.
--
-- Extending the atomicity to multiple 'IORef's is problematic, so it
-- is recommended that if you need to do anything more complicated
-- then using 'Control.Concurrent.MVar.MVar' instead is a good idea.
B
-- This function is useful for using 'IORef' in a safe way in a multithreaded
-- program. If you only have one 'IORef', then using 'atomicModifyIORef' to
-- access and modify it will prevent race conditions.
--
-- Extending the atomicity to multiple 'IORef's is problematic, so it
-- is recommended that if you need to do anything more complicated
-- then using 'Control.Concurrent.MVar.MVar' instead is a good idea.
B
DS
PK
DS
DS
DS
p
G
PK
DS
DS
p
PK