SDL_Quit() called inside a DLL using MINGW gives page fault on W98?

SDL Development
1

Hi all

I recently developed a small program in Rh9 usind SDL 1.2.6 that worked
correctly. Compiled in W98 using MINGW as an .EXE it also runs correctly.

However, compiling the program as a DLL and then calling the DLL works, but on
executing an exit(); inside the DLL code it always aborts with a page fault.
I traced the problem to the atexit(sdl_quit) line. I removed this and the
program now runs without a page fault.

My question: Is it a known occurrence that doing sdl_quit() inside a DLL under
Windows causes a page fault? Or do I have a memory leak somewhere that does
not emerge in Linux but only on Windows? If I have a memory leak or
something, why does the code, ran inside an EXE, NOT cause a page fault?

Or is this a “feature” of a DLL, i. e. at_exit() code is not allowed inside
it?

Thanks!–

Stefan Viljoen
Software Support Technician
Polar Design Solutions

2

I’m not exactly sure about your setup, but I’ve had weird atexit() problems
on Win32 alot. One thing that has seemed to work with me is to pass
SDL_INIT_NOPARACHUTE to SDL_Init(). It’s kinda a hack, since I still
haven’t figured out why passing it fixes the problems I was having, or even
what was causing the problems in the first place. (BTW, I know somebody’s
gonna say it, so I’m gonna head them off: these crashes happen nomatter how
simple I make the SDL app, or how I muck with the compile settings, and it
happens in MinGW, Cygwin, and MSVC++7).

If this doesn’t help, perhaps you can re-define the way you need your
project setup (as I mentioned, I couldn’t parse what your exact setup is,
so…) to not require the .DLL.

  • Alex “Silicon” Lyman> ----- Original Message -----

From: rylan@intekom.co.za (Stefan Viljoen)
To:
Sent: Monday, April 26, 2004 7:05 AM
Subject: [SDL] SDL_Quit() called inside a DLL using MINGW gives page fault
on W98?

Hi all

I recently developed a small program in Rh9 usind SDL 1.2.6 that worked
correctly. Compiled in W98 using MINGW as an .EXE it also runs correctly.

However, compiling the program as a DLL and then calling the DLL works,
but on
executing an exit(); inside the DLL code it always aborts with a page
fault.
I traced the problem to the atexit(sdl_quit) line. I removed this and the
program now runs without a page fault.

My question: Is it a known occurrence that doing sdl_quit() inside a DLL
under
Windows causes a page fault? Or do I have a memory leak somewhere that
does
not emerge in Linux but only on Windows? If I have a memory leak or
something, why does the code, ran inside an EXE, NOT cause a page fault?

Or is this a “feature” of a DLL, i. e. at_exit() code is not allowed
inside
it?

Thanks!

Stefan Viljoen
Software Support Technician
Polar Design Solutions

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