Queue function re-enterant

I have a producer consumer with multiple consumers. Each consumer has its own queue. Say three consumers. I am using a que library where obtain queue, enqueue, dequeue are all wrapped in upper level functions.My question is should these wrapper VIs needs to be re-enterant? TIA
CLD,CTD
Solved!
Go to Solution.
Attachments:
Queue.jpg ‏108 KB

MainVi.jpg shows how data is passed from UIR loop to other loops.
The image attached as "AnotherThread.jpg" different queue are used to enqueue and send data to other loops.
Can the same wrapper marked as shared clone be used across each queue and can still create separate queues? Or should there be different wrappers created, one for each queue?
CLD,CTD
Attachments:
MainVi.jpg ‏185 KB
AnotherThread.jpg ‏159 KB

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Simplified Queue functions

The one problem with using the Queue functions is that they are all primitives. With that in mind MK and myself developed a Queue handler API that incorporates the primitive functions - as well as more advanced functions into a polymorphic VI.
We hope this improves your Queued State Machine experience.
Visualize the Solution
CLA
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Attachments:
Queue API.llb ‏404 KB

VADave wrote:
We also used to use enums but to make a generic Queue handler we had to adapt to strings. We chose not wire the errors into the primitives so that an error generated in elsewhere by the code will not impact the operation of the Queues.
The main code error cluster is routed to the error cluster of the Queue handler so that we can trap on any error and redirect the queue to the error case. The error trapping is done be the Queued Error handler.vi which is placed to the left of the program cases.
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Could you share an example of your main code to illustrate the use of your VIs and what you are describing here. I've been working on a very similar set of VIs to publish on DevZone as a reference design/design pattern for this purpose and at the ame time clean up/consolidate the myriad of different implementations currently posted on DevZone.
I agree with your use of strings for the queue element to make the tools more reusable and digestible by less experienced LV users, though using a unique TypeDef Enum and associated library to manage the queue for each application would be stronger SW design. In some cases I think it is appropriate to choose ease-of-use over robustness.
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I am trying to use IMAQ acquire and other IMAQ functions with Queue functions.

i am trying to use IMAQ acquire and other IMAQ functions with Queue functions.
i mean i would like to acquire the image in a queue and deque it afterwards. would be the queue function accept the IMAQ data type?

Refer posting, http://exchange.ni.com/servlet/Redirect?id=8879554

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Hi Aart-Jan,
It looks like CHAOS has a solution! Oh well, for what it's worth...
I coded this (attached) under 7.1, used a strict (simple) enum bundled with variant, but was unable to reproduce the problem. I've experienced odd behaviour related to type-def ambiguity at the output of case structures, and where shifted value is supposed to determine type in other cases. I'd try, instead of deleting/replacing the queue operators, deleteing/re-wiring, forcing shift-register to use queue-type from case shown.
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Attachments:
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Queue function re-enterant

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