Attachment #86396 for bug #211799

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Lines 127-132 Link Here

(-)src/org/eclipse/core/internal/jobs/JobManager.java (+9 lines)
127	*/	127	*/
128	private final JobQueue waiting;	128	private final JobQueue waiting;
129		129
		130	/**
		131	* Counter to record wait queue insertion order.
		132	*/
		133	private long waitQueueCounter;
		134
130	public static void debug(String msg) {	135	public static void debug(String msg) {
131	StringBuffer msgBuf = new StringBuffer(msg.length() + 40);	136	StringBuffer msgBuf = new StringBuffer(msg.length() + 40);
132	if (DEBUG_TIMING) {	137	if (DEBUG_TIMING) {
Lines 319-324 Link Here
319	switch (newState) {	324	switch (newState) {
320	case Job.NONE :	325	case Job.NONE :
321	job.setStartTime(InternalJob.T_NONE);	326	job.setStartTime(InternalJob.T_NONE);
		327	job.setWaitQueueStamp(InternalJob.T_NONE);
322	case InternalJob.BLOCKED :	328	case InternalJob.BLOCKED :
323	break;	329	break;
324	case Job.WAITING :	330	case Job.WAITING :
Lines 334-339 Link Here
334	case Job.RUNNING :	340	case Job.RUNNING :
335	case InternalJob.ABOUT_TO_RUN :	341	case InternalJob.ABOUT_TO_RUN :
336	job.setStartTime(InternalJob.T_NONE);	342	job.setStartTime(InternalJob.T_NONE);
		343	job.setWaitQueueStamp(InternalJob.T_NONE);
337	running.add(job);	344	running.add(job);
338	break;	345	break;
339	case InternalJob.ABOUT_TO_SCHEDULE :	346	case InternalJob.ABOUT_TO_SCHEDULE :
Lines 443-448 Link Here
443	changeState(job, Job.SLEEPING);	450	changeState(job, Job.SLEEPING);
444	} else {	451	} else {
445	job.setStartTime(System.currentTimeMillis() + delayFor(job.getPriority()));	452	job.setStartTime(System.currentTimeMillis() + delayFor(job.getPriority()));
		453	job.setWaitQueueStamp(waitQueueCounter++);
446	changeState(job, Job.WAITING);	454	changeState(job, Job.WAITING);
447	}	455	}
448	}	456	}
Lines 828-833 Link Here
828	InternalJob job = sleeping.peek();	836	InternalJob job = sleeping.peek();
829	while (job != null && job.getStartTime() < now) {	837	while (job != null && job.getStartTime() < now) {
830	job.setStartTime(now + delayFor(job.getPriority()));	838	job.setStartTime(now + delayFor(job.getPriority()));
		839	job.setWaitQueueStamp(waitQueueCounter++);
831	changeState(job, Job.WAITING);	840	changeState(job, Job.WAITING);
832	job = sleeping.peek();	841	job = sleeping.peek();
833	}	842	}

Lines 89-94 Link Here

(-)src/org/eclipse/core/internal/jobs/InternalJob.java (+22 lines)
89	* or -1 if the job should not be rescheduled.	89	* or -1 if the job should not be rescheduled.
90	*/	90	*/
91	private long startTime;	91	private long startTime;
		92
		93	/**
		94	* Stamp added when a job is added to the wait queue. Used to ensure
		95	* jobs in the wait queue maintain their insertion order even if they are
		96	* removed from the wait queue temporarily while blocked
		97	*/
		98	private long waitQueueStamp = T_NONE;
		99
92	/*	100	/*
93	* The thread that is currently running this job	101	* The thread that is currently running this job
94	*/	102	*/
Lines 538-541 Link Here
538	protected void wakeUp(long delay) {	546	protected void wakeUp(long delay) {
539	manager.wakeUp(this, delay);	547	manager.wakeUp(this, delay);
540	}	548	}
		549
		550	/**
		551	* @param waitQueueStamp The waitQueueStamp to set.
		552	*/
		553	void setWaitQueueStamp(long waitQueueStamp) {
		554	this.waitQueueStamp = waitQueueStamp;
		555	}
		556
		557	/**
		558	* @return Returns the waitQueueStamp.
		559	*/
		560	long getWaitQueueStamp() {
		561	return waitQueueStamp;
		562	}
541	}	563	}




		Assert.isTrue(newEntry.previous() == null);
		InternalJob tail = dummy.next();
		//overtake lower priority jobs. Only overtake conflicting jobs if allowed to
		while (canOvertake(newEntry, tail))
			tail = tail.next();
		//new entry is smaller than tail
		final InternalJob tailPrevious = tail.previous();

	}

	/**
	 * Returns whether the new entry to overtake the existing queue entry.
	 * @param newEntry The entry to be added to the queue
	 * @param queueEntry The existing queue entry
	 */
	private boolean canOvertake(InternalJob newEntry, InternalJob queueEntry) {
		//can never go past the end of the queue
		if (queueEntry == dummy)
			return false;
		//if the new entry was already in the wait queue, ensure it is re-inserted in correct position (bug 211799)
		if (newEntry.getWaitQueueStamp() > 0 && newEntry.getWaitQueueStamp() < queueEntry.getWaitQueueStamp())
			return true;
		//if the new entry has lower priority, there is no need to overtake the existing entry
		if (queueEntry.compareTo(newEntry) >= 0)
			return false;
		//the new entry has higher priority, but only overtake the existing entry if the queue allows it
		return allowConflictOvertaking || !newEntry.isConflicting(queueEntry);
	}

	/**
	 * Removes the given element from the queue. 
	 */
	public void remove(InternalJob toRemove) {

Return to bug 211799

Lines 72-78 Link Here

(-)src/org/eclipse/core/internal/jobs/JobQueue.java (-1 / +20 lines)
72	Assert.isTrue(newEntry.previous() == null);	72	Assert.isTrue(newEntry.previous() == null);
73	InternalJob tail = dummy.next();	73	InternalJob tail = dummy.next();
74	//overtake lower priority jobs. Only overtake conflicting jobs if allowed to	74	//overtake lower priority jobs. Only overtake conflicting jobs if allowed to
75	while (tail != dummy && tail.compareTo(newEntry) < 0 && (allowConflictOvertaking \|\| !newEntry.isConflicting(tail)))	75	while (canOvertake(newEntry, tail))
76	tail = tail.next();	76	tail = tail.next();
77	//new entry is smaller than tail	77	//new entry is smaller than tail
78	final InternalJob tailPrevious = tail.previous();	78	final InternalJob tailPrevious = tail.previous();
Lines 83-88 Link Here
83	}	83	}
84		84
85	/**	85	/**
		86	* Returns whether the new entry to overtake the existing queue entry.
		87	* @param newEntry The entry to be added to the queue
		88	* @param queueEntry The existing queue entry
		89	*/
		90	private boolean canOvertake(InternalJob newEntry, InternalJob queueEntry) {
		91	//can never go past the end of the queue
		92	if (queueEntry == dummy)
		93	return false;
		94	//if the new entry was already in the wait queue, ensure it is re-inserted in correct position (bug 211799)
		95	if (newEntry.getWaitQueueStamp() > 0 && newEntry.getWaitQueueStamp() < queueEntry.getWaitQueueStamp())
		96	return true;
		97	//if the new entry has lower priority, there is no need to overtake the existing entry
		98	if (queueEntry.compareTo(newEntry) >= 0)
		99	return false;
		100	//the new entry has higher priority, but only overtake the existing entry if the queue allows it
		101	return allowConflictOvertaking \|\| !newEntry.isConflicting(queueEntry);
		102	}
		103
		104	/**
86	* Removes the given element from the queue.	105	* Removes the given element from the queue.
87	*/	106	*/
88	public void remove(InternalJob toRemove) {	107	public void remove(InternalJob toRemove) {