<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="EN-US" link="blue" vlink="#954F72" style="word-wrap:break-word"> <div class="WordSection1"> Hi Juan, all <o:p> </o:p> just a quick one: <o:p> </o:p> I'm puzzled by this example: <o:p> </o:p> [1/0] fork. 5 seconds asDelay wait. self error: 'error' <o:p> </o:p> I'd expect the ZeroDivide notifier pop up immediately because the #wait should allow the forked process run and request the notifier window - and thanks to the lastest updates a new UI should get spawned while the old one is being blocked... but it's not happening and I can't figure out why :) Maybe you'll see it right away; maybe I’m just missing something obvious; otherwise I'll keep digging - many thanks! <o:p> </o:p> best, Jaromir <o:p> </o:p> <o:p> </o:p> <div style="mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> From: <a href="mailto:cuis-dev@lists.cuis.st">Jaromir Matas via Cuis-dev</a> Sent: Saturday, July 9, 2022 22:59 To: <a href="mailto:JuanVuletich@zoho.com">Juan Vuletich</a>; <a href="mailto:cuis-dev@lists.cuis.st"> Discussion of Cuis Smalltalk</a> Cc: <a href="mailto:mail@jaromir.net">Jaromir Matas</a> Subject: Re: [Cuis-dev] FW: FW: Freezing UI - can't interrupt via Alt+. </div> <o:p> </o:p> Hi Juan,<o:p></o:p> <o:p> </o:p> > But I don't think this problem grants adding a class variable to SystemDictionary. I just pushed an update that calls #valueUnpreemptively instead.<o:p></o:p> <o:p> </o:p> Fair point about the class variable; I felt the same but wanted to demonstrate some solution; unfortunately #valueUnpreemptively didn’t occur to me, thanks! It works fine indeed.<o:p></o:p> <o:p> </o:p> I can see you solved the highestPriority + 1 issue in #priority: … nice :) So no need to fix #terminate now, thanks.<o:p></o:p> <o:p> </o:p> I’m working on an updated version of #terminate with a few improvements; one of them is the ‘active+1’ priority is replaced with a semaphore to achieve full synchronization between the process invoking the termination and the process being terminated. I’ll send the final version after testing it properly; fixing this LowSpaceWatcher issue was one of the prerequisites; many thanks for your quick response!<o:p></o:p> <o:p> </o:p> Best,<o:p></o:p> Jaromir<o:p></o:p> -- Jaromír Matas<o:p></o:p> mail@jaromir.net <o:p> </o:p> <div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> From: <a href="mailto:JuanVuletich@zoho.com">Juan Vuletich</a> Sent: Saturday, July 9, 2022 21:57 To: <a href="mailto:cuis-dev@lists.cuis.st">Discussion of Cuis Smalltalk</a> Cc: <a href="mailto:JuanVuletich@zoho.com">Juan Vuletich</a>; <a href="mailto:mail@jaromir.net"> Jaromir Matas</a> Subject: Re: [Cuis-dev] FW: FW: Freezing UI - can't interrupt via Alt+.<o:p></o:p> </div> <o:p> </o:p> Hi Jaromir, You are right, and your code is safer. But I don't think this problem grants adding a class variable to SystemDictionary. I just pushed an update that calls #valueUnpreemptively instead. Thanks, On 7/9/2022 8:17 AM, Jaromir Matas via Cuis-dev wrote: <o:p></o:p> <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"> Hi Juan,<o:p></o:p> <o:p></o:p> I’ve stumbled upon this irregularity:<o:p></o:p> <o:p></o:p> If you run this in the Workspace…<o:p></o:p> <o:p></o:p> [Smalltalk installLowSpaceWatcher] fork.<o:p></o:p> [Smalltalk installLowSpaceWatcher] fork<o:p></o:p> <o:p></o:p> … the system ends up with two processes running the #lowSpaceWatcher method; the root cause is #installLowSpaceWatcher runs unprotected against multiple concurrent invocations.<o:p></o:p> <o:p></o:p> I’d suggest running the # installLowSpaceWatcher’s code as the Semaphore >> #critical section: see attached changeset with a more detailed description in the method comment. Please feel free to modify in any way :)<o:p></o:p> <o:p></o:p> Thanks for your opinion,<o:p></o:p> Jaromir<o:p></o:p> <o:p></o:p> --<o:p></o:p> Jaromír Matas<o:p></o:p> <a href="mailto:mail@jaromir.net">mail@jaromir.net</a><o:p></o:p> <o:p></o:p> </blockquote> <o:p> </o:p> <pre>-- </pre> <pre>Juan Vuletich</pre> <pre><a href="http://www.cuis-smalltalk.org">www.cuis-smalltalk.org</a></pre> <pre><a href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev</a></pre> <pre><a href="https://github.com/jvuletich">https://github.com/jvuletich</a></pre> <pre><a href="https://www.linkedin.com/in/juan-vuletich-75611b3">https://www.linkedin.com/in/juan-vuletich-75611b3</a></pre> <pre><a href="https://independent.academia.edu/JuanVuletich">https://independent.academia.edu/JuanVuletich</a></pre> <pre><a href="https://www.researchgate.net/profile/Juan-Vuletich">https://www.researchgate.net/profile/Juan-Vuletich</a></pre> <pre><a href="https://patents.justia.com/inventor/juan-manuel-vuletich">https://patents.justia.com/inventor/juan-manuel-vuletich</a></pre> <pre><a href="https://twitter.com/JuanVuletich">https://twitter.com/JuanVuletich</a></pre> <o:p> </o:p> <o:p> </o:p> </div> </body> </html>