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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:
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<p class="MsoNormal">Hi Juan,</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve stumbled upon this irregularity:</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you run this in the Workspace…</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[Smalltalk installLowSpaceWatcher] fork.</p>
<p class="MsoNormal">[Smalltalk installLowSpaceWatcher] fork</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">… the system ends up with two processes
running the #lowSpaceWatcher method; the root cause is
#installLowSpaceWatcher runs unprotected against multiple
concurrent invocations.</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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 :)</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for your opinion,</p>
<p class="MsoNormal">Jaromir</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNoSpacing"><span lang="CS">--</span></p>
<p class="MsoNoSpacing"><strong><span style="font-family:
"Calibri Light",sans-serif; color: rgb(51, 51,
51); font-weight: normal;">Jaromír Matas</span></strong><span
style="font-family: "Calibri Light",sans-serif;
color: rgb(85, 85, 85);"><o:p></o:p></span></p>
<p class="MsoNoSpacing"><span style="font-family: "Calibri
Light",sans-serif; color: rgb(46, 117, 182);"><a class="moz-txt-link-abbreviated" href="mailto:mail@jaromir.net">mail@jaromir.net</a></span></p>
<p class="MsoNormal"><o:p> </o:p><br>
</p>
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<br>
<pre class="moz-signature" cols="72">--
Juan Vuletich
<a class="moz-txt-link-abbreviated" href="http://www.cuis-smalltalk.org">www.cuis-smalltalk.org</a>
<a class="moz-txt-link-freetext" href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev</a>
<a class="moz-txt-link-freetext" href="https://github.com/jvuletich">https://github.com/jvuletich</a>
<a class="moz-txt-link-freetext" href="https://www.linkedin.com/in/juan-vuletich-75611b3">https://www.linkedin.com/in/juan-vuletich-75611b3</a>
<a class="moz-txt-link-freetext" href="https://independent.academia.edu/JuanVuletich">https://independent.academia.edu/JuanVuletich</a>
<a class="moz-txt-link-freetext" href="https://www.researchgate.net/profile/Juan-Vuletich">https://www.researchgate.net/profile/Juan-Vuletich</a>
<a class="moz-txt-link-freetext" href="https://patents.justia.com/inventor/juan-manuel-vuletich">https://patents.justia.com/inventor/juan-manuel-vuletich</a>
<a class="moz-txt-link-freetext" href="https://twitter.com/JuanVuletich">https://twitter.com/JuanVuletich</a></pre>
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