Copyright | Copyright (c) 2009-2016, David Sorokin <david.sorokin@gmail.com> |
---|---|

License | BSD3 |

Maintainer | David Sorokin <david.sorokin@gmail.com> |

Stability | experimental |

Safe Haskell | None |

Language | Haskell2010 |

Tested with: GHC 8.0.1

This module defines an infinite queue that can use the specified strategies.

- type FCFSQueue a = Queue FCFS FCFS a
- type LCFSQueue a = Queue LCFS FCFS a
- type SIROQueue a = Queue SIRO FCFS a
- type PriorityQueue a = Queue StaticPriorities FCFS a
- data Queue sm so a
- newFCFSQueue :: Event (FCFSQueue a)
- newLCFSQueue :: Event (LCFSQueue a)
- newSIROQueue :: Event (SIROQueue a)
- newPriorityQueue :: Event (PriorityQueue a)
- newQueue :: (QueueStrategy sm, QueueStrategy so) => sm -> so -> Event (Queue sm so a)
- enqueueStoringStrategy :: Queue sm so a -> sm
- dequeueStrategy :: Queue sm so a -> so
- queueNull :: Queue sm so a -> Event Bool
- queueCount :: Queue sm so a -> Event Int
- queueCountStats :: Queue sm so a -> Event (TimingStats Int)
- enqueueStoreCount :: Queue sm so a -> Event Int
- dequeueCount :: Queue sm so a -> Event Int
- dequeueExtractCount :: Queue sm so a -> Event Int
- enqueueStoreRate :: Queue sm so a -> Event Double
- dequeueRate :: Queue sm so a -> Event Double
- dequeueExtractRate :: Queue sm so a -> Event Double
- queueWaitTime :: Queue sm so a -> Event (SamplingStats Double)
- dequeueWaitTime :: Queue sm so a -> Event (SamplingStats Double)
- queueRate :: Queue sm so a -> Event Double
- dequeue :: (DequeueStrategy sm, EnqueueStrategy so) => Queue sm so a -> Process a
- dequeueWithOutputPriority :: (DequeueStrategy sm, PriorityQueueStrategy so po) => Queue sm so a -> po -> Process a
- tryDequeue :: DequeueStrategy sm => Queue sm so a -> Event (Maybe a)
- enqueue :: (EnqueueStrategy sm, DequeueStrategy so) => Queue sm so a -> a -> Event ()
- enqueueWithStoringPriority :: (PriorityQueueStrategy sm pm, DequeueStrategy so) => Queue sm so a -> pm -> a -> Event ()
- queueDelete :: (Eq a, DeletingQueueStrategy sm, DequeueStrategy so) => Queue sm so a -> a -> Event Bool
- queueDelete_ :: (Eq a, DeletingQueueStrategy sm, DequeueStrategy so) => Queue sm so a -> a -> Event ()
- queueDeleteBy :: (DeletingQueueStrategy sm, DequeueStrategy so) => Queue sm so a -> (a -> Bool) -> Event (Maybe a)
- queueDeleteBy_ :: (DeletingQueueStrategy sm, DequeueStrategy so) => Queue sm so a -> (a -> Bool) -> Event ()
- queueContains :: (Eq a, DeletingQueueStrategy sm) => Queue sm so a -> a -> Event Bool
- queueContainsBy :: DeletingQueueStrategy sm => Queue sm so a -> (a -> Bool) -> Event (Maybe a)
- clearQueue :: DequeueStrategy sm => Queue sm so a -> Event ()
- queueSummary :: (Show sm, Show so) => Queue sm so a -> Int -> Event ShowS
- queueNullChanged :: Queue sm so a -> Signal Bool
- queueNullChanged_ :: Queue sm so a -> Signal ()
- queueCountChanged :: Queue sm so a -> Signal Int
- queueCountChanged_ :: Queue sm so a -> Signal ()
- enqueueStoreCountChanged :: Queue sm so a -> Signal Int
- enqueueStoreCountChanged_ :: Queue sm so a -> Signal ()
- dequeueCountChanged :: Queue sm so a -> Signal Int
- dequeueCountChanged_ :: Queue sm so a -> Signal ()
- dequeueExtractCountChanged :: Queue sm so a -> Signal Int
- dequeueExtractCountChanged_ :: Queue sm so a -> Signal ()
- queueWaitTimeChanged :: Queue sm so a -> Signal (SamplingStats Double)
- queueWaitTimeChanged_ :: Queue sm so a -> Signal ()
- dequeueWaitTimeChanged :: Queue sm so a -> Signal (SamplingStats Double)
- dequeueWaitTimeChanged_ :: Queue sm so a -> Signal ()
- queueRateChanged :: Queue sm so a -> Signal Double
- queueRateChanged_ :: Queue sm so a -> Signal ()
- enqueueStored :: Queue sm so a -> Signal a
- dequeueRequested :: Queue sm so a -> Signal ()
- dequeueExtracted :: Queue sm so a -> Signal a
- queueChanged_ :: Queue sm so a -> Signal ()

# Queue Types

type FCFSQueue a = Queue FCFS FCFS a Source #

A type synonym for the ordinary FIFO queue also known as the FCFS (First Come - First Serviced) queue.

type LCFSQueue a = Queue LCFS FCFS a Source #

A type synonym for the ordinary LIFO queue also known as the LCFS (Last Come - First Serviced) queue.

type SIROQueue a = Queue SIRO FCFS a Source #

A type synonym for the SIRO (Serviced in Random Order) queue.

type PriorityQueue a = Queue StaticPriorities FCFS a Source #

A type synonym for the queue with static priorities applied when storing the elements in the queue.

Represents an infinite queue using the specified strategies for
internal storing (in memory), `sm`

, and dequeueing (output), `so`

, where `a`

denotes
the type of items stored in the queue.

(Show sm, Show so, ResultItemable (ResultValue sm), ResultItemable (ResultValue so)) => ResultProvider (Queue sm so a) Source # | |

# Creating Queue

newFCFSQueue :: Event (FCFSQueue a) Source #

Create a new infinite FCFS queue.

newLCFSQueue :: Event (LCFSQueue a) Source #

Create a new infinite LCFS queue.

newSIROQueue :: Event (SIROQueue a) Source #

Create a new infinite SIRO queue.

newPriorityQueue :: Event (PriorityQueue a) Source #

Create a new infinite priority queue.

:: (QueueStrategy sm, QueueStrategy so) | |

=> sm | the strategy applied when storing items in the queue |

-> so | the strategy applied to the dequeueing (output) processes when the queue is empty |

-> Event (Queue sm so a) |

Create a new infinite queue with the specified strategies.

# Queue Properties and Activities

enqueueStoringStrategy :: Queue sm so a -> sm Source #

The strategy applied when storing (in memory) items in the queue.

dequeueStrategy :: Queue sm so a -> so Source #

The strategy applied to the dequeueing (output) processes.

queueNull :: Queue sm so a -> Event Bool Source #

Test whether the queue is empty.

See also `queueNullChanged`

and `queueNullChanged_`

.

queueCount :: Queue sm so a -> Event Int Source #

Return the current queue size.

See also `queueCountStats`

, `queueCountChanged`

and `queueCountChanged_`

.

queueCountStats :: Queue sm so a -> Event (TimingStats Int) Source #

Return the queue size statistics.

enqueueStoreCount :: Queue sm so a -> Event Int Source #

Return the total number of input items that were stored.

See also `enqueueStoreCountChanged`

and `enqueueStoreCountChanged_`

.

dequeueCount :: Queue sm so a -> Event Int Source #

Return the total number of requests for dequeueing the items, not taking into account the failed attempts to dequeue immediately without suspension.

See also `dequeueCountChanged`

and `dequeueCountChanged_`

.

dequeueExtractCount :: Queue sm so a -> Event Int Source #

Return the total number of output items that were actually dequeued.

See also `dequeueExtractCountChanged`

and `dequeueExtractCountChanged_`

.

enqueueStoreRate :: Queue sm so a -> Event Double Source #

Return the rate of the items that were stored: how many items per time.

dequeueRate :: Queue sm so a -> Event Double Source #

Return the rate of the requests for dequeueing the items: how many requests per time. It does not include the failed attempts to dequeue immediately without suspension.

dequeueExtractRate :: Queue sm so a -> Event Double Source #

Return the rate of the output items that were dequeued: how many items per time.

queueWaitTime :: Queue sm so a -> Event (SamplingStats Double) Source #

Return the wait time from the time at which the item was stored in the queue to the time at which it was dequeued.

See also `queueWaitTimeChanged`

and `queueWaitTimeChanged_`

.

dequeueWaitTime :: Queue sm so a -> Event (SamplingStats Double) Source #

Return the dequeue wait time from the time at which the item was requested for dequeueing to the time at which it was actually dequeued.

See also `dequeueWaitTimeChanged`

and `dequeueWaitTimeChanged_`

.

queueRate :: Queue sm so a -> Event Double Source #

Return a long-term average queue rate calculated as the average queue size divided by the average wait time.

See also `queueRateChanged`

and `queueRateChanged_`

.

# Dequeuing and Enqueuing

:: (DequeueStrategy sm, EnqueueStrategy so) | |

=> Queue sm so a | the queue |

-> Process a | the dequeued value |

Dequeue suspending the process if the queue is empty.

dequeueWithOutputPriority Source #

:: (DequeueStrategy sm, PriorityQueueStrategy so po) | |

=> Queue sm so a | the queue |

-> po | the priority for output |

-> Process a | the dequeued value |

Dequeue with the output priority suspending the process if the queue is empty.

:: DequeueStrategy sm | |

=> Queue sm so a | the queue |

-> Event (Maybe a) | the dequeued value of |

Try to dequeue immediately.

:: (EnqueueStrategy sm, DequeueStrategy so) | |

=> Queue sm so a | the queue |

-> a | the item to enqueue |

-> Event () |

Enqueue the item.

enqueueWithStoringPriority Source #

:: (PriorityQueueStrategy sm pm, DequeueStrategy so) | |

=> Queue sm so a | the queue |

-> pm | the priority for storing |

-> a | the item to enqueue |

-> Event () |

Enqueue with the storing priority the item.

:: (Eq a, DeletingQueueStrategy sm, DequeueStrategy so) | |

=> Queue sm so a | the queue |

-> a | the item to remove from the queue |

-> Event Bool | whether the item was found and removed |

Remove the item from the queue and return a flag indicating whether the item was found and actually removed.

:: (Eq a, DeletingQueueStrategy sm, DequeueStrategy so) | |

=> Queue sm so a | the queue |

-> a | the item to remove from the queue |

-> Event () |

Remove the specified item from the queue.

:: (DeletingQueueStrategy sm, DequeueStrategy so) | |

=> Queue sm so a | the queue |

-> (a -> Bool) | the predicate |

-> Event (Maybe a) |

Remove an item satisfying the specified predicate and return the item if found.

:: (DeletingQueueStrategy sm, DequeueStrategy so) | |

=> Queue sm so a | the queue |

-> (a -> Bool) | the predicate |

-> Event () |

Remove an item satisfying the specified predicate.

:: (Eq a, DeletingQueueStrategy sm) | |

=> Queue sm so a | the queue |

-> a | the item to search the queue for |

-> Event Bool | whether the item was found |

Detect whether the item is contained in the queue.

:: DeletingQueueStrategy sm | |

=> Queue sm so a | the queue |

-> (a -> Bool) | the predicate |

-> Event (Maybe a) | the item if it was found |

Detect whether an item satisfying the specified predicate is contained in the queue.

:: DequeueStrategy sm | |

=> Queue sm so a | the queue |

-> Event () |

Clear the queue immediately.

# Summary

queueSummary :: (Show sm, Show so) => Queue sm so a -> Int -> Event ShowS Source #

Return the summary for the queue with desciption of its properties and activities using the specified indent.

# Derived Signals for Properties

queueNullChanged :: Queue sm so a -> Signal Bool Source #

Signal when the `queueNull`

property value has changed.

queueNullChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `queueNull`

property value has changed.

queueCountChanged :: Queue sm so a -> Signal Int Source #

Signal when the `queueCount`

property value has changed.

queueCountChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `queueCount`

property value has changed.

enqueueStoreCountChanged :: Queue sm so a -> Signal Int Source #

Signal when the `enqueueStoreCount`

property value has changed.

enqueueStoreCountChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `enqueueStoreCount`

property value has changed.

dequeueCountChanged :: Queue sm so a -> Signal Int Source #

Signal when the `dequeueCount`

property value has changed.

dequeueCountChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `dequeueCount`

property value has changed.

dequeueExtractCountChanged :: Queue sm so a -> Signal Int Source #

Signal when the `dequeueExtractCount`

property value has changed.

dequeueExtractCountChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `dequeueExtractCount`

property value has changed.

queueWaitTimeChanged :: Queue sm so a -> Signal (SamplingStats Double) Source #

Signal when the `queueWaitTime`

property value has changed.

queueWaitTimeChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `queueWaitTime`

property value has changed.

dequeueWaitTimeChanged :: Queue sm so a -> Signal (SamplingStats Double) Source #

Signal when the `dequeueWaitTime`

property value has changed.

dequeueWaitTimeChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `dequeueWaitTime`

property value has changed.

queueRateChanged :: Queue sm so a -> Signal Double Source #

Signal when the `queueRate`

property value has changed.

queueRateChanged_ :: Queue sm so a -> Signal () Source #

Signal when the `queueRate`

property value has changed.

# Basic Signals

enqueueStored :: Queue sm so a -> Signal a Source #

Return a signal that notifies when the enqueued item is stored in the internal memory of the queue.

dequeueRequested :: Queue sm so a -> Signal () Source #

Return a signal that notifies when the dequeuing operation was requested.

dequeueExtracted :: Queue sm so a -> Signal a Source #

Return a signal that notifies when the item was extracted from the internal storage of the queue and prepared for immediate receiving by the dequeuing process.

# Overall Signal

queueChanged_ :: Queue sm so a -> Signal () Source #

Signal whenever any property of the queue changes.

The property must have the corresponded signal. There are also characteristics similar to the properties but that have no signals. As a rule, such characteristics already depend on the simulation time and therefore they may change at any time point.