On Aug 16, 2009, at 12:07 PM, Igor Stasenko wrote:
2009/8/16 Stéphane Ducasse <stephane.ducasse@inria.fr>:
Bill (and igor)
I would love to continue to remove Project from the image so the "spawnProcessIfThisIsUI:self activeProcess." should probably find another host. Do you have an idea about the class that could be the natural place to define such a method? if so can you propose a change?
IMO WorldState is the way to go. Since you removing Project, then you couldn't have multiple worlds, right? yes projects are totally broken in pharo.
Stef
On Aug 16, 2009, at 5:57 AM, Schwab,Wilhelm K wrote:
Sig, all,
I have been preparing MC packages with classes and method designed to soften the blow of moving much of my domain code to Pharo. In this case, I have some sends of ProcessorSchedler>>forkMainIfMain, so I created that method. Initially, I made it emtpy, and then based on what you helpe me find, I tried
ProcessorScheduler>>forkMainIfMain Project spawnProcessIfThisIsUI:self activeProcess.
The above gets called from something that then immediately waits on a semaphore that is signalled by one of two threads. One of the threads waits on a timer, the other tries to evaluate a block; creating a background worker thread that will run for a limited time. There is a test case that tries various combinations, some of which should succeed and some should time out. I have used these things in production in Dolphin for some time.
In Dolphin, #forkMainIfMain allows the UI to be responsive during these tests, but trying the above in Pharo turns ugly. There are problems that appear to related to two UI processes - running short of events or something like that. The tests run for only a few seconds, though I suppose I could try to allow enough time to look around, but then I'm probably not the right person to do the looking anyway.
DUMB question: the argument to #spawnProcessIfThisIsUI: is named suspendedProcess. Do I need to ensure the process in question is indeed suspended before entering the method? If so, then I start wondering how to get there from #forkMainIfMain, but it's a little late for my brain to take on that question.
One thing is certain: what I tried did not work. There were errors from the event loop and even some screen scarring.
Bill
-----Original Message----- From: pharo-project-bounces@lists.gforge.inria.fr [mailto:pharo-project-bounces@lists.gforge.inria.fr ] On Behalf Of Igor Stasenko Sent: Saturday, August 15, 2009 3:29 PM To: Pharo-project@lists.gforge.inria.fr Subject: Re: [Pharo-project] Analog to Dolphin's #forkMainIfMain?
2009/8/15 Schwab,Wilhelm K <bschwab@anest.ufl.edu>:
Is there anything in Pharo that starts a new main thread to carry on for one that is about to get blocked? It might be that Pharo does not need it, since sockets are serviced by the VM, where Dolphin (at least prior to overlapped calls) did the I/O through the event loop; if the main thread stopped, so did Windows event dispatching, and hence no socket I/O.
There is such thing. Try to explore the way how debugger handling this (when process you want to debug is current UI process), or when you pressing interrupt key.
See Debugger>>openOn: process context: context label: title contents: contentsStringOrNil fullView: bool
at 'Project spawnNewProcessIfThisIsUI: process'
Dolphin to some extent, and WindowBuilder to (IIRC) a large extent create modal loops in Smalltalk code. I see a few references to such things in Pharo, but I'm fairly lost. Where should I start reading and/or browsing?
Bill
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-- Best regards, Igor Stasenko AKA sig.
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