[SDL] SDL_FreeSurface issue?

[Lilith Calbridge]

As you've done it in your code, setting image to NULL after
deallocating, it should work okay.  It would be nice to have
SDL_FreeSurface() return a NULL instead of a void to help eliminate the
step.  That wouldn't eliminate the problem but it could lead to fewer
such errors.

I haven't used LoadIMG so I can't comment on that at the moment.  Have
you tried replacing LoadIMG with SDL_LoadBMP()?  Can you do any memory
availability tracking before and after the loads and frees?

-- 
Lilith

>>> On 11/12/2006 at 1:35 PM, in message
<loom.20061112T202743-266 at post.gmane.org>,
Armond <armond.sarkisian at gmail.com> wrote:
> Hi everyone,
> 
> I want to know one thing. If I create a surface, allocate it and then

> deallocate it and then once more allocate it again, would that cause
a 
> problem. 
> I seem to have a problem with the examples below. I thought if you 
> deallocate 
> it, all should be well right?
> 
> ////////////////////////////////////////
> image = LoadIMG( "ball.bmp" );
> if( !image ) // throw error
> SDL_FreeSurface( image );
> image = NULL; // just in case
> image = LoadIMG( "ball.bmp" );
> if( !image ) // throw error
> ////////////////////////////////////////
> 
> Same for music. I seem to have a problem with this code if I load it
and 
> unload 
> it a few times in a row. The program halts and says "Not Responding."
It 
> just 
> freezes.
> 
> ////////////////////////////////////////
> Mix_HaltMusic( );
> Mix_FreeMusic( my_sdl.music ); 
> my_sdl.music = Mix_LoadMUS( "music.wav" ); 
> if( !my_sdl.music ) // throw error
> if( Mix_PlayMusic( my_sdl.music, -1 ) == -1 ) // throw error 
> ////////////////////////////////////////
> 
> Also, is it a good idea to do this prior to freeing any surfaces?
> 
> if( image != NULL ){ SDL_FreeSurface( image ); }
> if( music != NULL ){ Mix_FreeMusic( music ); }
> 
> Just in case they are NULL, we woulden't want to free something that
is not 
> there
> 
> Any help would be appreciated.
> 
> Thanks!
> 
> 
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