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<p class="MsoNormal">Hi Juan,</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">> <span style="color:black">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></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">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></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">I can see you solved the highestPriority + 1 issue in #priority: … nice :) So no need to fix #terminate now, thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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. <span style="color:black">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!</span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best,</p>
<p class="MsoNormal">Jaromir</p>
<p class="MsoNoSpacing"><span lang="CS">--</span></p>
<p class="MsoNoSpacing"><strong><span style="font-family:"Calibri Light",sans-serif;color:#333333;font-weight:normal">Jaromír Matas</span></strong><span style="font-family:"Calibri Light",sans-serif;color:#555555"><o:p></o:p></span></p>
<p class="MsoNoSpacing"><span style="font-family:"Calibri Light",sans-serif;color:#2E75B6">mail@jaromir.net</span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:JuanVuletich@zoho.com">Juan Vuletich</a><br>
<b>Sent: </b>Saturday, July 9, 2022 21:57<br>
<b>To: </b><a href="mailto:cuis-dev@lists.cuis.st">Discussion of Cuis Smalltalk</a><br>
<b>Cc: </b><a href="mailto:JuanVuletich@zoho.com">Juan Vuletich</a>; <a href="mailto:mail@jaromir.net">
Jaromir Matas</a><br>
<b>Subject: </b>Re: [Cuis-dev] FW: FW: Freezing UI - can't interrupt via Alt+.</p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:black">Hi Jaromir,<br>
<br>
You are right, and your code is safer.<br>
<br>
But I don't think this problem grants adding a class variable to SystemDictionary. I just pushed an update that calls #valueUnpreemptively instead.<br>
<br>
Thanks,<br>
<br>
On 7/9/2022 8:17 AM, Jaromir Matas via Cuis-dev wrote: <o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="color:black">Hi Juan,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">I’ve stumbled upon this irregularity:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">If you run this in the Workspace…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">[Smalltalk installLowSpaceWatcher] fork.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">[Smalltalk installLowSpaceWatcher] fork<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">… 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></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">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></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Thanks for your opinion,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jaromir<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNoSpacing"><span lang="CS" style="color:black">--</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNoSpacing"><strong><span style="font-family:"Calibri Light",sans-serif;font-weight:normal">Jaromír Matas</span></strong><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNoSpacing"><span style="color:black"><a href="mailto:mail@jaromir.net">mail@jaromir.net</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal"><span style="color:black"><br>
<br>
<o:p></o:p></span></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>
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