Stange Exceptions with Delegates

[Trevor Parscal]

Trevor Parscal Wrote:

> torhu Wrote:
> 
> > Trevor Parscal wrote:
> > > Im experiencing a very strange behavior with delegates. When using some OpenGL functions in a delegate my program will give me
> > > 
> > > object.Exception: Access Violation
> > > - when there's a Cout call at the begining and end of the delegate
> > > 
> > > object.Exception: Win32 Exception
> > > - when it's only OpenGL calls in the delegate
> > > 
> > > The strangest part is that the Cout calls will succeed in printing to the console, meaning the access violation isn't in the OpenGL calls. I also placed some Cout calls before and after the actual calling of the delegate, and the first prints, while the second (post delegate calling) never does.
> > > 
> > > So what could be happening between the last call inside of a delegate and the delegate being done?
> > 
> > Are you on windows?  A typical mistake is calling openGL functions using 
> > the cdecl calling convention, you need to use stdcall.  stdcall is 
> > 'extern (Windows)' or 'extern (System)' in D.  Mixing up calling 
> > conventions leads to stack corruption, and then usually a crash sooner 
> > or later after the function returns.
> 
> Excelent advice, and after looking at other opengl bindings you are absolutely right... However.
> 
> I am using implib to generate a .lib from my opengl32.dll on my system - and the only way I can get a compile without linking errors is to use extern(C)
> 
> I have tried using the /s flag and not - no difference in behavior. Any ideas of what I could do to fix this?


I found these def files as referred to in this post

http://www.digitalmars.com/d/archives/digitalmars/D/12896.html

which solved my problem. Thanks for the help!