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Question G4VPhysicalVolume->GetTranslation() from threads 

Forum: Multithreading
Date: 07 Apr, 2016
From: Jan Pipek <Jan Pipek>

Hello,

I have one question regarding the MT implementation of the geometry.

In my application, I run a simple web server in a separate thread (not master, not worker) that allows me to remotely inspect and control some aspects of the running application. However, when I try to access (some) geometry information (like PV translations, LV materials etc.), I run into an unpleasant surprise in the form of application crash. This seems to be the result of the "subinstances" being used to hold this information (these subinstances, as I understand it, are relevant only for threads initialized by the Geant4 MT mechanism).

So the question is - can I somehow get to full geometry data from an independent thread? Or is there any other suggested approach? I don't have the necessary deep understanding of Geant4 MT :-(

Thanks for any ideas, Jan

P.S. Of course, general access to geometry may be dangerous, but at least in Idle state, I don't see any reason why the information should not be readable (if not writable).

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1 Idea: Re: G4VPhysicalVolume->GetTranslation() from threads   (Andrea Dotti - 07 Apr, 2016)
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