Global table inside a DLL

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question

Chien_yu C asked Jan 31, '22 Ryan Clark commented Feb 10, '22

Global table inside a DLL

I have developed a dll from DLLMaker. One of the function directly manipulate a global table. The data is populated correctly and I can use the table in a model. However, when I close/new model, flexsim is just hung (Not responding). I tried to attach the process to a debugger but that does not give me any info since it's not crashing. Please advise how to debug this problem. thanks

Software Version:

FlexSim 20.2.3

global table dll maker

· 7

Jason Lightfoot ♦ commented · Feb 01, 2022 at 02:18 PM

Are you able to first disconnect the dll and close FlexSim normally without it hanging?

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Chien_yu C Jason Lightfoot ♦ commented · Feb 01, 2022 at 07:16 PM

Is there a way to unload the library? My dll function is called by specifying a dll function. I can quit FlexSim normally after loading that function, just not close/new model. I am using something like:

```
treenode truckListTable = reftable("TruckList");

nodeinsertinto(truckListTable);

setnodename(last(truckListTable), it->model);

```

to populate the table. I did not use the Table constructor since this constructor is not in the DllMaker.

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Jason Lightfoot ♦ Chien_yu C commented · Feb 01, 2022 at 08:29 PM

File->System->Disconnect DLLs

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Chien_yu C commented · Feb 03, 2022 at 01:23 AM

The hanging came from one of the com object I am using needs

CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);

For all of the exported c function, I have this line as the first line executed before using a static object containing this com object. However, the destructor for that static object would not be able to run in this environment. I can create a user command to clean the com object, but I don't see a trigger for model closed though.

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Jordan Johnson ♦♦ Chien_yu C commented · Feb 04, 2022 at 10:55 PM

CoInitializeEx() is only supposed to be called once per thread that needs it. If you have a single static instance of a class, and that class needs COM calls, then consider calling CoInitializeEx() in the constructor of that class, and call CoUninitialize() in the destructor. Does that help, or change anything?

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Ryan Clark commented · Feb 10, 2022 at 01:06 AM

Hi @Chien_yu C,

We haven't heard back from you. Were you able to solve your problem? If so, please add and accept an answer to let others know the solution. Or please respond to the previous comment so that we can continue to help you.

If we don't hear back in the next 3 business days, we'll assume you were able to solve your problem and we'll close this case in our tracker. You can always comment back at any time to reopen your question, or you can contact your local FlexSim distributor for phone or email help.

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