javax.safetycritical

Class ScjProcess

java.lang.Object

javax.safetycritical.ScjProcess

All Implemented Interfaces:

java.lang.Comparable<ScjProcess>

final class ScjProcess
extends java.lang.Object
implements java.lang.Comparable<ScjProcess>

Defines the VM process context for an executing Java program.

Version:

1.2; - December 2013

Author:

Anders P. Ravn, Aalborg University, apr@cs.aau.dk,
Hans Søndergaard, VIA University College, Denmark, hso@viauc.dk

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) static interface	ScjProcess.State

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static ScjProcess	idleProcess Idle process is created and put in readyQueue, so that readyQueue will never be empty.
(package private) int	index
(package private) javax.realtime.AbsoluteTime	next
(package private) javax.realtime.RelativeTime	period
(package private) vm.Process	process
(package private) javax.realtime.Clock	rtClock
(package private) javax.realtime.RelativeTime	start
(package private) int	state
(package private) ManagedEventHandler	target

Constructor Summary

Constructors

Constructor and Description
ScjProcess(ManagedEventHandler handler, int[] stack) The constructor initializes a new VM process object

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(ScjProcess process) Compares this process with the parameter process.
static ScjProcess	createIdleProcess() Creates and returns the singleton idle process.
void	start()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

process

vm.Process process

target

ManagedEventHandler target

state

int state

rtClock

javax.realtime.Clock rtClock

next

javax.realtime.AbsoluteTime next

start

javax.realtime.RelativeTime start

period

javax.realtime.RelativeTime period

index

int index

idleProcess

static ScjProcess idleProcess

Idle process is created and put in readyQueue, so that readyQueue will never be empty. Idle process has lowest priority.
Idle process is a periodic handler with "infinite" period.

Constructor Detail

ScjProcess

ScjProcess(ManagedEventHandler handler,
          int[] stack)

The constructor initializes a new VM process object

Parameters:

target - is the handler containing the handleAsyncEvent method to be executed

stack - is the run time stack

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

compareTo

public int compareTo(ScjProcess process)

Compares this process with the parameter process. The ordering of the processes are done after next release and priority.

Specified by:

compareTo in interface java.lang.Comparable<ScjProcess>

createIdleProcess

public static ScjProcess createIdleProcess()

Creates and returns the singleton idle process. If idle process is already created, no new process is created.

Returns:

Returns the singleton idle process.

start

public void start()