| 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.Resource
Contents
Description
Tested with: GHC 7.10.1
This module defines the resource which can be acquired and
then released by the discontinuous process Process.
The resource can be either limited by the upper bound
(run-time check), or it can have no upper bound. The latter
is useful for modeling the infinite queue, for example.
- type FCFSResource = Resource FCFS
- type LCFSResource = Resource LCFS
- type SIROResource = Resource SIRO
- type PriorityResource = Resource StaticPriorities
- data Resource s
- newFCFSResource :: Int -> Event FCFSResource
- newFCFSResourceWithMaxCount :: Int -> Maybe Int -> Event FCFSResource
- newLCFSResource :: Int -> Event LCFSResource
- newLCFSResourceWithMaxCount :: Int -> Maybe Int -> Event LCFSResource
- newSIROResource :: Int -> Event SIROResource
- newSIROResourceWithMaxCount :: Int -> Maybe Int -> Event SIROResource
- newPriorityResource :: Int -> Event PriorityResource
- newPriorityResourceWithMaxCount :: Int -> Maybe Int -> Event PriorityResource
- newResource :: QueueStrategy s => s -> Int -> Event (Resource s)
- newResourceWithMaxCount :: QueueStrategy s => s -> Int -> Maybe Int -> Event (Resource s)
- resourceStrategy :: Resource s -> s
- resourceMaxCount :: Resource s -> Maybe Int
- resourceCount :: Resource s -> Event Int
- resourceCountStats :: Resource s -> Event (TimingStats Int)
- resourceUtilisationCount :: Resource s -> Event Int
- resourceUtilisationCountStats :: Resource s -> Event (TimingStats Int)
- resourceQueueCount :: Resource s -> Event Int
- resourceQueueCountStats :: Resource s -> Event (TimingStats Int)
- resourceTotalWaitTime :: Resource s -> Event Double
- resourceWaitTime :: Resource s -> Event (SamplingStats Double)
- requestResource :: EnqueueStrategy s => Resource s -> Process ()
- requestResourceWithPriority :: PriorityQueueStrategy s p => Resource s -> p -> Process ()
- tryRequestResourceWithinEvent :: Resource s -> Event Bool
- releaseResource :: DequeueStrategy s => Resource s -> Process ()
- releaseResourceWithinEvent :: DequeueStrategy s => Resource s -> Event ()
- usingResource :: EnqueueStrategy s => Resource s -> Process a -> Process a
- usingResourceWithPriority :: PriorityQueueStrategy s p => Resource s -> p -> Process a -> Process a
- incResourceCount :: DequeueStrategy s => Resource s -> Int -> Event ()
- decResourceCount :: EnqueueStrategy s => Resource s -> Int -> Process ()
- resourceCountChanged :: Resource s -> Signal Int
- resourceCountChanged_ :: Resource s -> Signal ()
- resourceUtilisationCountChanged :: Resource s -> Signal Int
- resourceUtilisationCountChanged_ :: Resource s -> Signal ()
- resourceQueueCountChanged :: Resource s -> Signal Int
- resourceQueueCountChanged_ :: Resource s -> Signal ()
- resourceWaitTimeChanged :: Resource s -> Signal (SamplingStats Double)
- resourceWaitTimeChanged_ :: Resource s -> Signal ()
- resourceChanged_ :: Resource s -> Signal ()
Resource Types
type FCFSResource = Resource FCFS Source
The ordinary FCFS (First Come - First Serviced) resource.
type LCFSResource = Resource LCFS Source
The ordinary LCFS (Last Come - First Serviced) resource.
type SIROResource = Resource SIRO Source
The SIRO (Serviced in Random Order) resource.
type PriorityResource = Resource StaticPriorities Source
The resource with static priorities.
Represents the resource with strategy s applied for queuing the requests.
Instances
| Eq (Resource s) | |
| (Show s, ResultItemable (ResultValue s)) => ResultProvider (Resource s) |
Creating Resource
Arguments
| :: Int | the initial count (and maximal count too) of the resource |
| -> Event FCFSResource |
Create a new FCFS resource with the specified initial count which value becomes the upper bound as well.
newFCFSResourceWithMaxCount Source
Arguments
| :: Int | the initial count of the resource |
| -> Maybe Int | the maximum count of the resource, which can be indefinite |
| -> Event FCFSResource |
Create a new FCFS resource with the specified initial and maximum counts,
where Nothing means that the resource has no upper bound.
Arguments
| :: Int | the initial count (and maximal count too) of the resource |
| -> Event LCFSResource |
Create a new LCFS resource with the specified initial count which value becomes the upper bound as well.
newLCFSResourceWithMaxCount Source
Arguments
| :: Int | the initial count of the resource |
| -> Maybe Int | the maximum count of the resource, which can be indefinite |
| -> Event LCFSResource |
Create a new LCFS resource with the specified initial and maximum counts,
where Nothing means that the resource has no upper bound.
Arguments
| :: Int | the initial count (and maximal count too) of the resource |
| -> Event SIROResource |
Create a new SIRO resource with the specified initial count which value becomes the upper bound as well.
newSIROResourceWithMaxCount Source
Arguments
| :: Int | the initial count of the resource |
| -> Maybe Int | the maximum count of the resource, which can be indefinite |
| -> Event SIROResource |
Create a new SIRO resource with the specified initial and maximum counts,
where Nothing means that the resource has no upper bound.
Arguments
| :: Int | the initial count (and maximal count too) of the resource |
| -> Event PriorityResource |
Create a new priority resource with the specified initial count which value becomes the upper bound as well.
newPriorityResourceWithMaxCount Source
Arguments
| :: Int | the initial count of the resource |
| -> Maybe Int | the maximum count of the resource, which can be indefinite |
| -> Event PriorityResource |
Create a new priority resource with the specified initial and maximum counts,
where Nothing means that the resource has no upper bound.
Arguments
| :: QueueStrategy s | |
| => s | the strategy for managing the queuing requests |
| -> Int | the initial count (and maximal count too) of the resource |
| -> Event (Resource s) |
Create a new resource with the specified queue strategy and initial count. The last value becomes the upper bound as well.
newResourceWithMaxCount Source
Arguments
| :: QueueStrategy s | |
| => s | the strategy for managing the queuing requests |
| -> Int | the initial count of the resource |
| -> Maybe Int | the maximum count of the resource, which can be indefinite |
| -> Event (Resource s) |
Create a new resource with the specified queue strategy, initial and maximum counts,
where Nothing means that the resource has no upper bound.
Resource Properties
resourceStrategy :: Resource s -> s Source
Return the strategy applied for queuing the requests.
resourceMaxCount :: Resource s -> Maybe Int Source
Return the maximum count of the resource, where Nothing
means that the resource has no upper bound.
resourceCount :: Resource s -> Event Int Source
Return the current available count of the resource.
resourceCountStats :: Resource s -> Event (TimingStats Int) Source
Return the statistics for the available count of the resource.
resourceUtilisationCount :: Resource s -> Event Int Source
Return the current utilisation count of the resource.
resourceUtilisationCountStats :: Resource s -> Event (TimingStats Int) Source
Return the statistics for the utilisation count of the resource.
resourceQueueCount :: Resource s -> Event Int Source
Return the current queue length of the resource.
resourceQueueCountStats :: Resource s -> Event (TimingStats Int) Source
Return the statistics for the queue length of the resource.
resourceTotalWaitTime :: Resource s -> Event Double Source
Return the total wait time of the resource.
resourceWaitTime :: Resource s -> Event (SamplingStats Double) Source
Return the statistics for the wait time of the resource.
Requesting for and Releasing Resource
Arguments
| :: EnqueueStrategy s | |
| => Resource s | the requested resource |
| -> Process () |
Request for the resource decreasing its count in case of success, otherwise suspending the discontinuous process until some other process releases the resource.
requestResourceWithPriority Source
Arguments
| :: PriorityQueueStrategy s p | |
| => Resource s | the requested resource |
| -> p | the priority |
| -> Process () |
Request with the priority for the resource decreasing its count in case of success, otherwise suspending the discontinuous process until some other process releases the resource.
Arguments
| :: DequeueStrategy s | |
| => Resource s | the resource to release |
| -> Process () |
Release the resource increasing its count and resuming one of the previously suspended processes as possible.
releaseResourceWithinEvent Source
Arguments
| :: DequeueStrategy s | |
| => Resource s | the resource to release |
| -> Event () |
Release the resource increasing its count and resuming one of the previously suspended processes as possible.
Arguments
| :: EnqueueStrategy s | |
| => Resource s | the resource we are going to request for and then release in the end |
| -> Process a | the action we are going to apply having the resource |
| -> Process a | the result of the action |
Acquire the resource, perform some action and safely release the resource
in the end, even if the IOException was raised within the action.
usingResourceWithPriority Source
Arguments
| :: PriorityQueueStrategy s p | |
| => Resource s | the resource we are going to request for and then release in the end |
| -> p | the priority |
| -> Process a | the action we are going to apply having the resource |
| -> Process a | the result of the action |
Acquire the resource with the specified priority, perform some action and
safely release the resource in the end, even if the IOException was raised
within the action.
Altering Resource
Arguments
| :: DequeueStrategy s | |
| => Resource s | the resource |
| -> Int | the increment for the resource count |
| -> Event () |
Increase the count of available resource by the specified number, invoking the awaiting processes as needed.
Arguments
| :: EnqueueStrategy s | |
| => Resource s | the resource |
| -> Int | the decrement for the resource count |
| -> Process () |
Decrease the count of available resource by the specified number, waiting for the processes capturing the resource as needed.
Signals
resourceCountChanged :: Resource s -> Signal Int Source
Signal triggered when the resourceCount property changes.
resourceCountChanged_ :: Resource s -> Signal () Source
Signal triggered when the resourceCount property changes.
resourceUtilisationCountChanged :: Resource s -> Signal Int Source
Signal triggered when the resourceUtilisationCount property changes.
resourceUtilisationCountChanged_ :: Resource s -> Signal () Source
Signal triggered when the resourceUtilisationCount property changes.
resourceQueueCountChanged :: Resource s -> Signal Int Source
Signal triggered when the resourceQueueCount property changes.
resourceQueueCountChanged_ :: Resource s -> Signal () Source
Signal triggered when the resourceQueueCount property changes.
resourceWaitTimeChanged :: Resource s -> Signal (SamplingStats Double) Source
Signal triggered when the resourceTotalWaitTime and resourceWaitTime properties change.
resourceWaitTimeChanged_ :: Resource s -> Signal () Source
Signal triggered when the resourceTotalWaitTime and resourceWaitTime properties change.
resourceChanged_ :: Resource s -> Signal () Source
Signal triggered when one of the resource counters changes.