Leaderboard

Remembering to version can be an issue, which is why I made a prebuild VI that runs which prompts you for the version. It also sets all installers to have the same version as the EXE you are setting, and I modified it so it sets the build number to the commit number in SVN.

The reason why I am trying to do this is for code reuse, modularity and scalability. My system has multiple comm ports with multiple instruments on each comm port. For example, a Modbus temperature controller and a Modbus PLC can be on the same comm port. I have 2 very different labview drivers for these instruments. Their init/shutdown routines are different. The polling period is different. The data types are different. I would rather not spend the time to develop a non-reentrant wrapper to go around the read-write functions of these drivers. Besides that, what happens when I decide to move the PLC to a different comm port? I don't want to have to modify the source code and re-compile. It should just be a matter of changing a line in a config file.

You are absolutely correct but a non-reentrant VI is the equivalent of a blocking socket as opposed to an asynchronous one and we can argue all day about the pros and cons of that. (It usually ends up as "it depends")

OpenG is free as in beer, and free as in speech. It is licensed under a BSD agreement, The majority of it is licensed under a BSD agreement, which basically means you can use it in commercial applications, edit it, change it, do as you please, as long as you attribute the creator (leaving in the text on the front panel) and there are a couple of other considerations when distributed as a binary.

http://sine.ni.com/nips/cds/view/p/lang/en/nid/209027

I don't know. But for a similar case, in my ignorance and probably just crudely redoing what the lock is supposed to be for, I used semaphores named after the VISA resources. I acquire the semaphore immediately before every read or write, and release it then (forget the specific details of the readout): To deal with multiple serial ports I have a FGV containing the list of serial ports used and their associated semaphore references. ResourceSemaphoreContainer.vi