https://labviewwiki.org/w/index.php?action=history&feed=atom&title=Functions_Palette%2FProgramming%2FSynchronization%2FSemaphoreFunctions Palette/Programming/Synchronization/Semaphore - Revision history2026-04-21T13:38:42ZRevision history for this page on the wikiMediaWiki 1.43.0https://labviewwiki.org/w/index.php?title=Functions_Palette/Programming/Synchronization/Semaphore&diff=29483&oldid=prevQ: Started page2020-06-22T19:59:03Z<p>Started page</p>
<p><b>New page</b></p><div>{{LabVIEW Palette<br />
|image = Semaphore Palette.png<br />
|title = Semaphore palette<br />
|1 = Obtain Semaphore Reference function{{!}}Obtain Semaphore Reference<br />
|2 = Acquire Semaphore function{{!}}Acquire Semaphore<br />
|3 = Release Semaphore function{{!}}Release Semaphore<br />
|4 = Release Semaphore Reference function{{!}}Release Semaphore Reference<br />
|11 = Get Semaphore Status function{{!}}Get Semaphore Status<br />
|13 = Not A Semaphore function{{!}}Not A Semaphore<br />
}}<br />
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{{LabVIEW Palette Object Information|palette=Functions Palette/Programming/Synchronization{{!}}Synchronization palette|type=palette}}<br />
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Use the '''Semaphore''' VIs to limit the number of tasks that can simultaneously operate on a shared (protected) resource. A protected resource or critical section of code might include writing to global variables or communicating with external instruments.<br />
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You can use the Semaphore VIs to synchronize two or more separate, parallel tasks so that only one task at a time executes a critical section of code protected by a common semaphore. In particular, use these VIs when you want certain VIs or parts of a block diagram to wait until another VI or part of a block diagram is finished with the execution of a critical section.<br />
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== Functions ==<br />
{| class="wikitable sortable"<br />
! Icon<br />
! Name<br />
|-<br />
! style="text-align: center;" | [[File:Semaphore Palette - Obtain Semaphore Reference.png|frameless|border|Obtain Semaphore Reference|link=Obtain Semaphore Reference function]]<br />
| [[Obtain Semaphore Reference function|Obtain Semaphore Reference]]<br />
|-<br />
! style="text-align: center;" | [[File:Semaphore Palette - Acquire Semaphore.png|frameless|border|Acquire Semaphore|link=Acquire Semaphore function]]<br />
| [[Acquire Semaphore function|Acquire Semaphore]]<br />
|-<br />
! style="text-align: center;" | [[File:Semaphore Palette - Release Semaphore.png|frameless|border|Release Semaphore|link=Release Semaphore function]]<br />
| [[Release Semaphore function|Release Semaphore]]<br />
|-<br />
! style="text-align: center;" | [[File:Semaphore Palette - Release Semaphore Reference.png|frameless|border|Release Semaphore Reference|link=Release Semaphore Reference function]]<br />
| [[Release Semaphore Reference function|Release Semaphore Reference]]<br />
|-<br />
! style="text-align: center;" | [[File:Semaphore Palette - Get Semaphore Status.png|frameless|border|Get Semaphore Status|link=Get Semaphore Status function]]<br />
| [[Get Semaphore Status function|Get Semaphore Status]]<br />
|-<br />
! style="text-align: center;" | [[File:Semaphore Palette - Not A Semaphore.png|frameless|border|Not A Semaphore|link=Not A Semaphore function]]<br />
| [[Not A Semaphore function|Not A Semaphore]]<br />
|}<br />
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== History ==<br />
{{ambox|text=History information is needed. What changes have occurred over previous versions?}}<br />
{| class="wikitable"<br />
! Version<br />
! Change(s)<br />
|-<br />
|[[File:LV2018.png|frameless|border|64x64px|LabVIEW 2018|link=LabVIEW 2018]]<br />
|More info to come.<br />
|}<br />
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[[Category:Semaphore Palette]]</div>Q