| 1 | package de.uka.ipd.sdq.scheduler.processes.impl; |
| 2 | |
| 3 | import de.uka.ipd.sdq.probfunction.math.util.MathTools; |
| 4 | import de.uka.ipd.sdq.scheduler.ISchedulableProcess; |
| 5 | import de.uka.ipd.sdq.scheduler.SchedulerModel; |
| 6 | import de.uka.ipd.sdq.scheduler.priority.IPriority; |
| 7 | import de.uka.ipd.sdq.scheduler.priority.IPriorityUpdateStrategy; |
| 8 | import de.uka.ipd.sdq.scheduler.processes.IActiveProcess; |
| 9 | import de.uka.ipd.sdq.scheduler.queueing.IRunQueue; |
| 10 | |
| 11 | public class ProcessWithPriority extends PreemptiveProcess { |
| 12 | |
| 13 | private IPriority staticPriority; |
| 14 | private IPriority dynamicPriority; |
| 15 | private IPriorityUpdateStrategy priorityUpdateStrategy; |
| 16 | private static boolean in_front_if_priority_changed = false; |
| 17 | |
| 18 | public ProcessWithPriority(SchedulerModel model, ISchedulableProcess process, |
| 19 | IPriority staticPriority) { |
| 20 | super(model, process); |
| 21 | this.staticPriority = staticPriority; |
| 22 | this.dynamicPriority = staticPriority; |
| 23 | this.priorityUpdateStrategy = null; |
| 24 | } |
| 25 | |
| 26 | public IPriority getStaticPriority() { |
| 27 | return staticPriority; |
| 28 | } |
| 29 | |
| 30 | public IPriority getDynamicPriority() { |
| 31 | return dynamicPriority; |
| 32 | } |
| 33 | |
| 34 | public void setPriorityUpdateStrategy( |
| 35 | IPriorityUpdateStrategy priorityUpdateStrategy) { |
| 36 | this.priorityUpdateStrategy = priorityUpdateStrategy; |
| 37 | } |
| 38 | |
| 39 | public void updatePriority(){ |
| 40 | if (this.priorityUpdateStrategy != null) |
| 41 | this.priorityUpdateStrategy.update(this); |
| 42 | } |
| 43 | |
| 44 | public boolean hasBonus() { |
| 45 | return dynamicPriority.greaterThan(staticPriority); |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Sets the dynamic priority back to the original, static priority. |
| 50 | */ |
| 51 | public void resetDynamicPriority() { |
| 52 | changePriority(staticPriority); |
| 53 | } |
| 54 | |
| 55 | public void decreasePriority() { |
| 56 | changePriority(dynamicPriority.decrease()); |
| 57 | } |
| 58 | |
| 59 | public boolean setToStaticPriorityWithBonus(int bonus) { |
| 60 | return changePriority(staticPriority.addBonus(bonus)); |
| 61 | } |
| 62 | |
| 63 | private boolean changePriority(IPriority new_priority) { |
| 64 | if (!dynamicPriority.equals(new_priority)){ |
| 65 | IRunQueue q = null; |
| 66 | if (isReady() && (q = getRunQueue()) != null){ |
| 67 | q.removeProcess(this); |
| 68 | dynamicPriority = new_priority; |
| 69 | q.addProcess(this,in_front_if_priority_changed); |
| 70 | } else { |
| 71 | dynamicPriority = new_priority; |
| 72 | } |
| 73 | return true; |
| 74 | } |
| 75 | return false; |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public void update() { |
| 80 | super.update(); |
| 81 | updatePriority(); |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | public String toString() { |
| 86 | return getName() + " (" + MathTools.round( getTimeslice().getRemainingTime(), 0.1) +", " + getDynamicPriority() + ")"; |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public IActiveProcess createNewInstance(ISchedulableProcess process) { |
| 91 | ProcessWithPriority p = new ProcessWithPriority(getModel(), process, staticPriority); |
| 92 | p.dynamicPriority = staticPriority; |
| 93 | if (this.priorityUpdateStrategy != null){ |
| 94 | p.priorityUpdateStrategy = this.priorityUpdateStrategy.cloneFor(p); |
| 95 | } |
| 96 | p.setTimeSlice(this.getTimeslice().clone()); |
| 97 | p.updatePriority(); |
| 98 | return p; |
| 99 | } |
| 100 | } |