Derek Brans wrote:
> I want an object to do something every 10 minutes.
> 
> I have the following code:
> 
> startTimer
> 	| delay |
> 	delay _ Delay forMilliseconds: 10 * 60 * 1000.
> 	[delay wait. true] whileTrue: [self save]
> 
> My question: is it save safe to call self startTimer from initialize?

In the light of the next question: No.

> If so, why doesn't the process that called "new" get trapped?

It gets trapped, means it waits in the semaphore of the Delay.

> If not, how should startTimer be called?

Possibly

startTimer
	| delay |
	delay _ Delay forMilliseconds: 10 * 60 * 1000.
	[[delay wait. true] whileTrue: [self save]] fork

or
        [[delay wait. true] whileTrue: [self save]]
           forkAt: someHigherPriority

for the last line may work (not tested).

Processes with same prio don't interrupt each other,
they just get a chance if the previous scheduled one with same prio
- will be interrupted by another one with higher prio, or
- has to be wait itself.

Greetings,

Stephan

> 
> Many thanks,
> Derek
> 
> Nerd on a Wire: Web and Information Solutions
> Website Design - Database Systems - Site Hosting
> 604.874.6463
> mailto:info at nerdonawire.com
> For more information, visit http://nerdonawire.com
> 
> 
> 


-- 
Stephan Rudlof (sr at evolgo.de)
   "Genius doesn't work on an assembly line basis.
    You can't simply say, 'Today I will be brilliant.'"
    -- Kirk, "The Ultimate Computer", stardate 4731.3