Date: Sun, 7 Sep 2008 15:17:00 +0200 From: c2woody@gmx.net Subject: [SDL] SDL 1.2 doube free/pointer zeroing missing Hello, this is about a crash/debug breakage for the current SDL 1.2 source tree (today's svn checkout, same problem in 1.2.13 and before as far as relevant). In some places memory is free()d but the associated pointer is not zeroed, leading to for example double free()s. For me this happened because SDL_StopEventThread() was executed twice (during restart of the subsystems), once for the close down in SDL_VideoQuit() and once at the startup, right at the beginning of SDL_StartEventLoop(). Thus the code SDL_DestroyMutex(SDL_EventQ.lock); (see SDL_events.c) was called twice and executed the SDL_free(mutex); twice as well, leading to a crash (msvc 64bit for which it was noticed). I've tried to check all other occurrences of SDL_free and similar code in msvc, see the attached patch (udiff against revision 4082). Non-windows only codepaths have neither been checked nor touched. Comments/ideas welcome. Attached patch: NULLifies some pointers after they have been free()d.

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Using the Simple DirectMedia Layer with S60 3.x / Symbian 9.x
==============================================================================

These instuctions are for people developing for S60 3.x. S60 3.x
uses Symbian OS so you need S60 SDK.

extract "symbian.zip" into this folder.

go to symbian folder

bldmake bldfiles
abld build

That produces WINSCW and ARMV5 versions of sdl.dll runtime library 
and sdl.lib for development. 
The sdlexe.dll/sdlexe.lib and sdlmain.lib are for easy SDL S60
integration, please see http://www.mbnet.fi/~mertama/sdl.html
for further info.