/**************************************************************************
* File name : PriorityScheduler.java
*
* This file is part a SCJ Level 0 and Level 1 implementation,
* based on SCJ Draft, Version 0.94 25 June 2013.
*
* It is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This SCJ Level 0 and Level 1 implementation is distributed in the hope
* that it will be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this SCJ Level 0 and Level 1 implementation.
* If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2012
* @authors Anders P. Ravn, Aalborg University, DK
* Stephan E. Korsholm and Hans Søndergaard,
* VIA University College, DK
*************************************************************************/
package javax.realtime;
import javax.safetycritical.annotate.Level;
import javax.safetycritical.annotate.SCJAllowed;
import javax.scj.util.Priorities;
/**
* This class represents the priority-based scheduler for Level 1 and 2. <br>
* The only access to the priority scheduler is for obtaining the minimum
* and maximum priorities.
*
* @version 1.2; - December 2013
*
* @author Anders P. Ravn, Aalborg University, <A
* HREF="mailto:apr@cs.aau.dk">apr@cs.aau.dk</A>, <br>
* Hans Søndergaard, VIA University College, Denmark, <A
* HREF="mailto:hso@viauc.dk">hso@via.dk</A>
*/
@SCJAllowed(Level.LEVEL_1)
public class PriorityScheduler extends Scheduler {
/**
*
* @return The maximum software real-time priority supported by this
* scheduler.
*/
@SCJAllowed(Level.LEVEL_1)
public int getMaxPriority() {
return Priorities.MAX_PRIORITY;
}
/**
*
* @return The minimum software real-time priority supported by this
* scheduler.
*/
@SCJAllowed(Level.LEVEL_1)
public int getMinPriority() {
return Priorities.MIN_PRIORITY;
}
/**
*
* @return The normal software real-time priority supported by this
* scheduler.
*/
@SCJAllowed(Level.LEVEL_1)
public int getNormPriority() {
return (Priorities.MIN_PRIORITY + Priorities.MAX_PRIORITY)/2;
}
// used for JML annotation only (not public)
int getMaxPr() {
return Priorities.MAX_PRIORITY;
}
// used for JML annotation only (not public)
int getMinPr() {
return Priorities.MIN_PRIORITY;
}
}