[Lazarus] Threads and Libraries (dll and so)

[Michael Van Canneyt]

On Tue, 4 Feb 2014, Michael Schnell wrote:

> I stumbled over this:
>
> http://tronche.com/gui/x/xlib/display/XInitThreads.html
>
> So Xlib is thread aware and they seem to suggest that it dopes make sense to 
> create multiple X sessions (i.e. one per thread) in a single program.

Thread aware does not necessarily mean thread-safe.

>
> (And I learned that in fact XInitThreads() can be called in Lazarus projects. 
> -> 
> http://lists.lazarus.freepascal.org/pipermail/lazarus/2013-January/078799.html 
> )
>
> So in fact X does support multiple "!GUIs" (e.g. one per thread) in a 
> multithreadded project.
>
> Of course it might be that QT (or KDE) impose additional restrictions (though 
> I still suppose that this can be handles somehow).

I think you should read

http://tronche.com/gui/x/xlib/display/XLockDisplay.html

It kind of defeats the purpose, as it suggests that only 1 thread at a time 
can access the display.

Michael.