Thanks for pursuing this.

----- Original Message ----- 
From: "John D. Ramsdell" 
To: 
Sent: Saturday, February 12, 2005 4:01 PM
Subject: [Cs-dev] FLTK and Csound 5


> Here is what I learned about FLTK for Csound 4 that may be relevant to
> future Csound 5 development.
> 
> 1. Mac OS X requires attention to the multithreading rules of FLTK.
> 
> 2. Linux, and probably NetBSD run code that respects the rules, but
>   also allows implementors to cheat.  
> 
> 3. MinGW/MSYS on Windows does not correctly run code that respects
>   the rules, but allows implementors to cheat.
> 
> I submitted a bug report to the FLTK developers.  I included a
> description of the way in which FLTK is used in Csound--as both a GUI
> driving the Csound engine in another thread, and as opcodes executed
> by the engine.  I also submitted a tiny multithreaded program that
> displays the problem on Windows.  The next entry in the bug reports
> says they plan to delay addressing the bug until version 2.0 FLTK!  We
> must have found something not easily fixed.  The good news, is I have
> a hack that gets around the problem on Windows.  Lines near 1725 in
> csound/widgets.cpp show the trick.
> 
> John
> 
> 
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"Michael Gogins"  writes:

> Thanks for pursuing this.

Your welcome.  Too bad the answer to the thread safety question is
punt until FLTK 2.0 is released.  :-(

John


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