resourceReleased

Class: matlab.DiscreteEventSystem
Package: matlab

Event action upon successful resource release

Since R2019a

Syntax

[entity,event,out1,...] = resourceReleased(obj,storage,entity,resources,tag,in1,...)


Description

[entity,event,out1,...] = resourceReleased(obj,storage,entity,resources,tag,in1,...) specifies event actions for a discrete-event System object™ upon successful resource release.

Input Arguments

obj — Discrete-event System object

MATLAB^® object

Discrete-event System object.

storage — Storage

double

Index of the storage element.

entity — Entity

MATLAB structure

Entity releasing the resource. Entity has these fields:

• sys (MATLAB structure) consisting of:

  • id (double) — Entity ID

  • priority (double) — Entity priority

• data — Entity data

resources — Released resources

MATLAB structure

An array of structures that specifies the resources that have been released.

tag — Tag of the resource release event

character vector

Tag of the currently executing resource release event.

in1 — First data input

character vector

First data input.

Output Arguments

entity — Entity

MATLAB structure

Entity releasing the resource.

event — Event

vector of MATLAB structures

Events to be scheduled. Use matlab.DiscreteEventSystem class methods to create events. Each event has these fields:

• type (character vector) — Type of the event

• delay (double) — Delay before the event

• priority (double) — Priority of the event

• storage (double) — Index of the storage element

• tag (character vector) — Event tag

• location (MATLAB structure) — Source or destination location of entity (see source)

out1 — First data output

character vector

First data output.

Examples

Event Action on Resource Release

Suppose that an entity releases resources successfully with a scheduled eventReleaseResource method and the tag of this event is MyResourceAcquireEvent. The successful release of the resources invokes the resourceReleased method to forward the entity to the output.

function [entity,events] = entry(obj, storage, entity, source)
  % On entry, release one resource of type Resource1.
  resRequest = obj.resourceSpecification('Resource1', 1);
  events = obj.eventReleaseResource(resRequest, 'MyResourceAcquireEvent');       
end
        
function [entity,events] = resourceReleased(obj, storage,...  
                            entity, resources, tag)
  % After resource release, forward the entity to the output.                     
  events = obj.eventForward('output', storage, 0.0);
end

Version History

Introduced in R2019a