If you modify #priority behavior as per my previous message the
#valueUnpreemptively can be simplified:

valueUnpreemptively
	| activeProcess oldPriority |
	activeProcess := Processor activeProcess.
	oldPriority := activeProcess priority.
	activeProcess priority: Processor highestPriority.
	^self ensure: [activeProcess priority: oldPriority].



--
Sent from: http://forum.world.st/Squeak-Dev-f45488.html