Experimental Physics and
Industrial Control System

John William Sinclair <[email protected]> · Tue, 27 Jul 2010 09:31:01 -0400

I do not think the 2D video widget use xpm. The original version
did but the current one does not.
John Sinclair
Kate Feng wrote:

Hi all,
  I do not know if anyone still use the libXpm.a library
for X11 applications. Since it is used in the 2D video
widget that I mentioned in the previous thread, I attach
the patch here, which fixes the memory leak that happened
on both our Linux RedHat and Debian PCs.  The memory leak
can be detected if the video display is exposed for
some period of time (e.g. not iconized).
I downloaded the source code (ie. xpm-3.4k.tar.gz) for
libXpm.a at ftp://ftp.x.org/contrib/libraries
and applied the attached patch.  If XpmReturnAllocPixels
is not specified in the attributes->valuemask, then
(*freeColors)() should be called.  I hope this helps.
Cheers,
Kate

diff -u create.c.orig create.c

--- create.c.orig 1998-03-19 14:51:00.000000000 -0500

+++ create.c 2010-05-20 09:42:41.000000000 -0400

@@ -929,8 +929,11 @@

if (attributes && (attributes->valuemask & XpmReturnAllocPixels)) {

attributes->alloc_pixels = alloc_pixels;

attributes->nalloc_pixels = nalloc_pixels;

- } else

- XpmFree(alloc_pixels);

+ } else {

+ /* Kate Feng: feeColors() if alloc'ed pixels is not return.
Otherwise, memory leaks */

+ (*freeColors)(display, colormap, alloc_pixels, nalloc_pixels,
NULL);

+ XpmFree(alloc_pixels);

+ }
 /* return created images */

if (image_return)

@@ -2234,8 +2237,11 @@

if (attributes && (attributes->valuemask & XpmReturnAllocPixels)) {

attributes->alloc_pixels = alloc_pixels;

attributes->nalloc_pixels = nalloc_pixels;

- } else

- XpmFree(alloc_pixels);

+ } else {

+ /* Kate Feng: feeColors() if alloc'ed pixels is not return.
Otherwise, memory leaks */

+ (*freeColors)(display, colormap, alloc_pixels, nalloc_pixels, NULL);

+ XpmFree(alloc_pixels);

+ }
     /* return created images */
     if (image_return)



Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System