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RT code example


Use a queue to send messages and data between two or more parallel process loops contained within a VI or other VIs. Queues also serve as the foundation for the "Queued State Machine" design pattern.

LabVIEW RT block diagram: for-loop structure enqueues 10 integers, then another for-loop structure dequeues the same elements

Use cases


Keep in mind

LabVIEW block diagram elements

Locate these elements with "Quick Drop" (press Ctrl+Space and start typing the name); click on an icon to see more sample code that uses that element:

Obtain Queue
Enqueue Element
Dequeue Element
Enqueue Element at Opposite End
Get Queue Status
Release Queue

Example code

Expected results

https://youtu.be/WybkXih2miA (0:38)

Developer walk-through

https://youtu.be/wpLCJxgQhl0 (3:33)


For more information

  1. What Is a Queue? (http://digital.ni.com/public.nsf/allkb/DD7DBD9B10E3E537862565BC006CC2E4)
    A description of the LabVIEW implementation of queues.