[Squeak-e] adding eventual sending to Croquet's ScriptProcess andScriptScheduler

[Andreas Raab]

> But...there is an issue:

Duh! Obsolete code! Sorry 'bout that - #newScript in both context and symbol
is entirely obsolete and no longer used. You need to use #startScript: for
everything, e.g.,

self startScript:
> 	[Transcript cr;
> 		show: 'platformName:  ';
> 		show: ((Smalltalk startScript: #platformName) 
> waitUntil: #done;  
> result) ]

will work.

Cheers,
  - Andreas

> -----Original Message-----
> From: squeak-e-bounces at lists.squeakfoundation.org 
> [mailto:squeak-e-bounces at lists.squeakfoundation.org] On 
> Behalf Of Robert Withers
> Sent: Sunday, February 16, 2003 3:41 AM
> To: Squeak-E - a capability-secure Squeak
> Subject: Re: [Squeak-e] adding eventual sending to Croquet's 
> ScriptProcess andScriptScheduler
> 
> 
> On Saturday, February 15, 2003, at 10:41 AM, Andreas Raab wrote:
> 
> > Rob,
> >
> >> What do you think would be the best way to activate the resolver?
> >
> > Remember the resolver in the process' properties (cheap way to  
> > experiment
> > with it - later we may want this to be an iVar) and then use
> > #stopScriptProcess: to notify the resolver (if there is 
> one). Seems  
> > like the
> > simplest solution to me. One more thing to keep in mind though:
> > #stopScriptProcess: is also invoked from #terminate and you'll  
> > probably need
> > something else to notify the resolver that this promise was broken.
> 
> 
> Andreas,  I have integrated eventual sending into the Scripting  
> framework.  It looks like there may be a reference issue with  
> #waitUntil:, since I have to inspect the scriptProcess or the 
> results  
> are intermittent.
> 
> The easy way was an EventualScriptMessageSend, which holds the  
> resolver.  The #valueWithArguments:event: method computes the result  
> and resolves the promise ( or smashes it).
> 
> If you load SqueakElib ( 
> http://swiki.squeakfoundation.org/squeak-e/3 )  
>   into a *throw away* Croquet image (I modify the Interpreter), then  
> load this changeset:   (  
> http://swiki.squeakfoundation.org/squeak-e/uploads/3/croquet-squeake- 
> bridge.cs ).
> 
> You can look at the comment of CroquetContext for examples.
> 
> 
> But...there is an issue:
> 
> The problem i am having is that I can't seem to get #waitUntil: to  
> work.  I need that so that a send of #immediateRef, to a 
> promise, will  
> result in that script blocking, until the underlying 
> computations have  
> completed and resolved the promise.   This computes intermittent  
> results.  I believe that the ScriptProcess is going away.    So, to  
> test I tried building a test out of this:
> 
> 	[Transcript cr;
> 		show: 'platformName:  ';
> 		show: ((Smalltalk startScript: #platformName) 
> waitUntil: #done;  
> result) ] newScript resume.
> 
> Otherwise it is working well, and I now have a "working" (minus the  
> issue above)  CroquetPromiseContext>>#immediateRef.  :-))))
> 
> I am really impressed with the work you have here, Andreas.  It's  
> really powerful.
> 
> cheers!
> rob
> 
> 
> 
> 
> Here is the performance dump of a regular smalltalk 
> expression and an  
> eventual smalltalk expression that is fairly intensive, but it only  
> evaluates 4 eventual message sends.  The cost of an eventual send is  
> between 20 and 80 ms.  I need to figure out a way to make these  
> measurements more accurate.
> 
> The performance ratio is: 	1.032
> 
> 
> Output from straight smalltalk
> 
> Morphs with more than 50 instances
> 		Thumbnail => 118
> 		PolygonMorph => 139
> 		BorderedStringMorph => 62
> 		AlignmentMorph => 253
> 		ThreePhaseButtonMorph => 61
> 		SameGameTile => 201
> 		Morph => 267
> 		TransformMorph => 58
> 		StringMorph => 1379
> 		TileMorph => 58
> 		ImageMorph => 193
> 		ScrollBar => 58
> 		SketchMorph => 157
> 		RectangleMorph => 611
> 		IconicButton => 143
> 		SimpleButtonMorph => 101
> 		WordGameLetterMorph => 320
> 	start time: 23985907
> 	stop time: 23996228
> 	running time: 10321 ms
> 
> 
> Output from the eventualCroquetRef
> 
> Morphs with more than 50 instances
> 		Thumbnail => 118
> 		PolygonMorph => 139
> 		BorderedStringMorph => 62
> 		AlignmentMorph => 252
> 		ThreePhaseButtonMorph => 61
> 		SameGameTile => 201
> 		Morph => 267
> 		TransformMorph => 55
> 		StringMorph => 1361
> 		TileMorph => 58
> 		ImageMorph => 187
> 		ScrollBar => 55
> 		SketchMorph => 153
> 		RectangleMorph => 588
> 		IconicButton => 139
> 		SimpleButtonMorph => 101
> 		WordGameLetterMorph => 320
> 	start time: 24012995
> 	stop time: 24022998
> 	running time: 10003 ms
> 
> 
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