| Copyright | Copyright (c) 2009-2015, David Sorokin <david.sorokin@gmail.com> |
|---|---|
| License | BSD3 |
| Maintainer | David Sorokin <david.sorokin@gmail.com> |
| Stability | experimental |
| Safe Haskell | None |
| Language | Haskell2010 |
Simulation.Aivika.Net
Contents
Description
Tested with: GHC 7.8.3
The module defines a Net arrow that can be applied to modeling the queue networks
like the Processor arrow from another module. Only the former has a more efficient
implementation of the Arrow interface than the latter, although at the cost of
some decreasing in generality.
While the Processor type is just a function that transforms the input Stream into another,
the Net type is actually an automaton that has an implementation very similar to that one
which the Circuit type has, only the computations occur in the Process monad. But unlike
the Circuit type, the Net type doesn't allow declaring recursive definitions, being based on
continuations.
In a nutshell, the Net type is an interchangeable alternative to the Processor type
with its weaknesses and strengths. The Net arrow is useful for constructing computations
with help of the proc-notation to be transformed then to the Processor computations that
are more general in nature and more easy-to-use but which computations created with help of
the proc-notation are not so efficient.
- newtype Net a b = Net {}
- iterateNet :: Net a a -> a -> Process ()
- iterateNetMaybe :: Net a (Maybe a) -> a -> Process ()
- iterateNetEither :: Net a (Either b a) -> a -> Process b
- emptyNet :: Net a b
- arrNet :: (a -> Process b) -> Net a b
- accumNet :: (acc -> a -> Process (acc, b)) -> acc -> Net a b
- withinNet :: Process () -> Net a a
- netUsingId :: ProcessId -> Net a b -> Net a b
- arrivalNet :: Net a (Arrival a)
- delayNet :: a -> Net a a
- netProcessor :: Net a b -> Processor a b
- processorNet :: Processor a b -> Net a b
- traceNet :: Maybe String -> Maybe String -> Net a b -> Net a b
Net Arrow
Represents the net as an automaton working within the Process computation.
iterateNet :: Net a a -> a -> Process () Source
Iterate infinitely using the specified initial value.
iterateNetMaybe :: Net a (Maybe a) -> a -> Process () Source
iterateNetEither :: Net a (Either b a) -> a -> Process b Source
Net Primitives
arrNet :: (a -> Process b) -> Net a b Source
Create a simple net by the specified handling function that runs the discontinuous process for each input value to get an output.
accumNet :: (acc -> a -> Process (acc, b)) -> acc -> Net a b Source
Accumulator that outputs a value determined by the supplied function.
withinNet :: Process () -> Net a a Source
Involve the computation with side effect when processing the input.
Specifying Identifier
netUsingId :: ProcessId -> Net a b -> Net a b Source
Create a net that will use the specified process identifier.
It can be useful to refer to the underlying Process computation which
can be passivated, interrupted, canceled and so on. See also the
processUsingId function for more details.
Arrival Net
arrivalNet :: Net a (Arrival a) Source
A net that adds the information about the time points at which the values were received.
Delaying Net
Interchanging Nets with Processors
netProcessor :: Net a b -> Processor a b Source
Transform the net to an equivalent processor (a rather cheap transformation).
processorNet :: Processor a b -> Net a b Source
Transform the processor to a similar net (a more costly transformation).