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<p>Hi all,</p>
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<p>in the context of the current Transcript debate [1], I am trying to figure out whether, and why Marcel's proposed implementation of <noContextSwitch> [2] could work.</p>
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<p>As a minimum example to test #valueNoContextSwitch, I tried the following:</p>
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<blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;">
<p><span style="font-size: 12pt;">"Try to run </span><span style="font-size: 12pt;">this
</span><span style="font-size: 12pt;">infinite</span><span style="font-size: 12pt;"> loop</span><span style="font-size: 12pt;"> unpreemptively."</span><br>
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<div>[</div>
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<div><span style="white-space:pre"></span>[[false] whileFalse] valueNoContextSwitch.</div>
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<div><span style="white-space:pre"></span>self inform: #done</div>
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<div>] forkAt: Processor userBackgroundPriority.</div>
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<p>Now I would have expected my image (its UI process) to freeze while p2 is running unpreemptively. But - nothing happens, i.e., all other processes are still activated! I also exchanged <span>valueNoContextSwitch with <span>valueUninterruptably (which I implemented
using primitive 123 analogously to <<span>noContextSwitch>) with the same result.</span></span></span></p>
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<p><span><span><span>Here is my question: Am I misunderstanding the concept of unpreemptive/uninterruptable execution (are those two terms really synonyms?), or is unpreempted execution broken?</span></span></span></p>
<p><span><span><span>Assuming the former is the case, what else would be a good and simple way to find out if a process is being run unpreemptively?</span></span></span></p>
<p><span><span><span>And do we have any good documentation of this concept - self-documenting tests will be preferred? :-)</span></span></span></p>
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<p><span><span><span>Best,</span></span></span></p>
<p><span><span><span>Christoph</span></span></span></p>
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<p>[1] <a href="http://forum.world.st/Transcript-error-when-forceUpdate-false-td5126397.html" class="OWAAutoLink" id="LPlnk779294" previewremoved="true">http://forum.world.st/Transcript-error-when-forceUpdate-false-td5126397.html</a></p>
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<div class="_rp_T4" id="Item.MessagePartBody">[2] <a href="http://forum.world.st/The-Inbox-Compiler-mt-454-mcz-td5126568.html" class="OWAAutoLink" id="LPlnk639407" previewremoved="true">http://forum.world.st/The-Inbox-Compiler-mt-454-mcz-td5126568.html</a></div>
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