Re: [ft] memory leak?

[David Turner]

Hello Martin,

Please note that the windows task manager is *not* a reliable way to 
detect memory leaks.
Even if a program has correctly released all its memory to the heap 
(with 'free'), the
corresponding memory pages will still be used by its process. This is 
normal behaviour
on Windows, and probably Linux as well.

Here's another test for you: initialize and close the library in a loop, 
as in:

 for (n = 0; n < 100000; n++)
 {
    FT_Init_FreeType( &library );
    Sleep(1000);   // sleep 1 second
    FT_Done_FreeType( library );
 }

If the library really leaks on your machine, you should see the process 
eating a few dozens or hundred
kilobytes per second. If not, there is no leak itself.

Hope this helps,

- David Turner
- The FreeType Project  (www.freetype.org)


Martin Olbrich a écrit :
> Hello,
>
> I am new to this list so my problem may be an old one.
>
> After using Freetype in my program i have a bad memory leak. So i 
> tried a sample program with just the freetype commands:
>
> #include <ft2build.h>
> #include FT_FREETYPE_H
>
> int main( int argc, char**  argv )
> {
>   FT_Library library;
>
>   FT_Face face;
>
> //breakpoint 1
>   FT_Init_FreeType(&library);
>
>   FT_New_Face(library, "somepath/arial.ttf", 0, &face);
>
>   FT_Done_Face(face);
>
>   FT_Done_FreeType( library );
> //breakpoint 2
>
>   return 0;
> }
>
> At breakpoint 2 there is about 200kb more memory in use than at 
> breakpoint 1. How can that be possible? Am I missing any commands that 
> tidy up the freetype memory? I also tried with _just_ the 
> FT_Init_FreeType and FT_Done_FreeType commands and get the same results.
>
> Some more info of my system:
> I checked the memory with the windows task manager and compiled 
> Freetype 2.2.1 with MS VS2005.
>
> Thx for any help
>
> bye
> martin.
>
>
> _______________________________________________
> Freetype mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/freetype


***********************************************************************************
Information contained in this email message is confidential and may be 
privileged, and is intended only for use of the individual or entity named 
above. If the reader of this message is not the intended recipient, or the 
employee or agent responsible to deliver it to the intended recipient, you are 
hereby notified that any dissemination, distribution or copying of this 
communication is strictly prohibited. If you have received this communication 
in error, please immediately notify the address@hidden and destroy the original 
message.
***********************************************************************************