Safe Haskell | None |
---|---|
Language | Haskell2010 |
A coroutine based, single threaded scheduler for Process
es.
Synopsis
- scheduleM :: forall m r a. Monad m => (forall b. Eff r b -> m b) -> m () -> Eff (InterruptableProcess r) a -> m (Either (ExitReason NoRecovery) a)
- schedulePure :: Eff (InterruptableProcess '[Logs, LogWriterReader PureLogWriter]) a -> Either (ExitReason NoRecovery) a
- scheduleIO :: MonadIO m => (forall b. Eff r b -> Eff '[Lift m] b) -> Eff (InterruptableProcess r) a -> m (Either (ExitReason NoRecovery) a)
- scheduleMonadIOEff :: MonadIO (Eff r) => Eff (InterruptableProcess r) a -> Eff r (Either (ExitReason NoRecovery) a)
- scheduleIOWithLogging :: HasCallStack => LogWriter IO -> Eff (InterruptableProcess LoggingAndIo) a -> IO (Either (ExitReason NoRecovery) a)
- defaultMainSingleThreaded :: HasCallStack => Eff (InterruptableProcess LoggingAndIo) () -> IO ()
Documentation
:: Monad m | |
=> (forall b. Eff r b -> m b) | |
-> m () | An that performs a yield w.r.t. the underlying effect
|
-> Eff (InterruptableProcess r) a | |
-> m (Either (ExitReason NoRecovery) a) |
Handle the Process
effect, as well as all lower effects using an effect handler function.
Execute the main Process
and all the other processes spawn
ed by it in the
current thread concurrently, using a co-routine based, round-robin
scheduler. If a process exits with eg.g exitNormally
or exitWithError
or is killed by another process Left ...
is returned.
Otherwise, the result will be wrapped in a Right
.
Every time a process _yields_ the effects are evaluated down to the a value
of type m (Either String a)
.
If the evaluator function runs the action down e.g. IO
this might improve
memory consumption, for long running services, with processes that loop
endlessly.
Since: 0.4.0.0
schedulePure :: Eff (InterruptableProcess '[Logs, LogWriterReader PureLogWriter]) a -> Either (ExitReason NoRecovery) a Source #
Like scheduleIO
but pure. The yield
effect is just return ()
.
schedulePure == runIdentity .
scheduleM
(Identity . run) (return ())
Since: 0.3.0.2
scheduleIO :: MonadIO m => (forall b. Eff r b -> Eff '[Lift m] b) -> Eff (InterruptableProcess r) a -> m (Either (ExitReason NoRecovery) a) Source #
scheduleMonadIOEff :: MonadIO (Eff r) => Eff (InterruptableProcess r) a -> Eff r (Either (ExitReason NoRecovery) a) Source #
scheduleIOWithLogging :: HasCallStack => LogWriter IO -> Eff (InterruptableProcess LoggingAndIo) a -> IO (Either (ExitReason NoRecovery) a) Source #
Run processes that have the Logs
and the Lift
effects.
The user must provide a log handler function.
Log messages are evaluated strict.
scheduleIOWithLogging ==scheduleIO
.withLogging
Since: 0.4.0.0
defaultMainSingleThreaded :: HasCallStack => Eff (InterruptableProcess LoggingAndIo) () -> IO () Source #
Execute a Process
using scheduleM
on top of Lift
IO
and withLogging
String
effects.