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sys/: Fix up the XShm call testing so that we catch errors, and don't cause new ones by attempting to detach from a s...

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Original commit message from CVS:
* sys/ximage/ximagesink.c: (gst_ximagesink_check_xshm_calls):
* sys/xvimage/xvimagesink.c: (gst_xvimagesink_check_xshm_calls):
Fix up the XShm call testing so that we catch errors, and don't
cause new ones by attempting to detach from a segment we failed
to attach to. Fixes #312439.
This commit is contained in:
Jan Schmidt 2006-02-11 23:35:55 +00:00
parent 705122a2c2
commit 6a22f9115b
3 changed files with 66 additions and 23 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2006-02-12 Jan Schmidt <thaytan@mad.scientist.com>
* sys/ximage/ximagesink.c: (gst_ximagesink_check_xshm_calls):
* sys/xvimage/xvimagesink.c: (gst_xvimagesink_check_xshm_calls):
Fix up the XShm call testing so that we catch errors, and don't
cause new ones by attempting to detach from a segment we failed
to attach to. Fixes #312439.
2006-02-10 Edward Hervey <edward@fluendo.com>
* gst/typefind/gsttypefindfunctions.c: (plugin_init):

47
sys/ximage/ximagesink.c
View file

@ -304,9 +304,17 @@ gst_ximagesink_check_xshm_calls (GstXImageSink * ximagesink,
size_t size;
int (*handler) (Display *, XErrorEvent *);
gboolean result = FALSE;
gboolean did_attach = FALSE;
g_return_val_if_fail (xcontext != NULL, FALSE);
/* Sync to ensure any older errors are already processed */
XSync (xcontext->disp, FALSE);
/* Set defaults so we don't free these later unnecessarily */
SHMInfo.shmaddr = ((void *) -1);
SHMInfo.shmid = -1;
/* Setting an error handler to catch failure */
error_caught = FALSE;
handler = XSetErrorHandler (gst_ximagesink_handle_xerror);
@ -316,7 +324,10 @@ gst_ximagesink_check_xshm_calls (GstXImageSink * ximagesink,
ximage = XShmCreateImage (xcontext->disp, xcontext->visual,
xcontext->depth, ZPixmap, NULL, &SHMInfo, 1, 1);
if (!ximage) {
/* Might cause an error, sync to ensure it is noticed */
XSync (xcontext->disp, FALSE);
if (!ximage || error_caught) {
GST_WARNING ("could not XShmCreateImage a 1x1 image");
goto beach;
}
@ -342,27 +353,31 @@ gst_ximagesink_check_xshm_calls (GstXImageSink * ximagesink,
goto beach;
}
XSync (xcontext->disp, 0);
/* Sync to ensure we see any errors we caused */
XSync (xcontext->disp, FALSE);
/* Destroy the image */
if (SHMInfo.shmaddr != ((void *) -1)) {
XShmDetach (xcontext->disp, &SHMInfo);
XSync (xcontext->disp, 0);
shmdt (SHMInfo.shmaddr);
if (!error_caught) {
did_attach = TRUE;
/* store whether we succeeded in result */
result = TRUE;
}
beach:
/* Sync to ensure we swallow any errors we caused and reset error_caught */
XSync (xcontext->disp, FALSE);
error_caught = FALSE;
XSetErrorHandler (handler);
if (did_attach) {
XShmDetach (xcontext->disp, &SHMInfo);
XSync (xcontext->disp, FALSE);
}
if (SHMInfo.shmaddr != ((void *) -1))
shmdt (SHMInfo.shmaddr);
if (SHMInfo.shmid > 0)
shmctl (SHMInfo.shmid, IPC_RMID, 0);
if (ximage)
XDestroyImage (ximage);
/* store whether we succeeded in result and reset error_caught */
result = !error_caught;
error_caught = FALSE;
beach:
XSetErrorHandler (handler);
XSync (xcontext->disp, FALSE);
return result;
}
#endif /* HAVE_XSHM */

34
sys/xvimage/xvimagesink.c
View file

@ -382,9 +382,17 @@ gst_xvimagesink_check_xshm_calls (GstXContext * xcontext)
gint size;
int (*handler) (Display *, XErrorEvent *);
gboolean result = FALSE;
gboolean did_attach = FALSE;
g_return_val_if_fail (xcontext != NULL, FALSE);
/* Sync to ensure any older errors are already processed */
XSync (xcontext->disp, FALSE);
/* Set defaults so we don't free these later unnecessarily */
SHMInfo.shmaddr = ((void *) -1);
SHMInfo.shmid = -1;
/* Setting an error handler to catch failure */
error_caught = FALSE;
handler = XSetErrorHandler (gst_xvimagesink_handle_xerror);
@ -393,7 +401,10 @@ gst_xvimagesink_check_xshm_calls (GstXContext * xcontext)
GST_DEBUG ("XvShmCreateImage of 1x1");
xvimage = XvShmCreateImage (xcontext->disp, xcontext->xv_port_id,
xcontext->im_format, NULL, 1, 1, &SHMInfo);
if (!xvimage) {
/* Might cause an error, sync to ensure it is noticed */
XSync (xcontext->disp, FALSE);
if (!xvimage || error_caught) {
GST_WARNING ("could not XvShmCreateImage a 1x1 image");
goto beach;
}
@ -419,19 +430,28 @@ gst_xvimagesink_check_xshm_calls (GstXContext * xcontext)
goto beach;
}
/* store whether we succeeded in result and reset error_caught */
result = !error_caught;
error_caught = FALSE;
/* Sync to ensure we see any errors we caused */
XSync (xcontext->disp, FALSE);
if (!error_caught) {
did_attach = TRUE;
/* store whether we succeeded in result */
result = TRUE;
}
beach:
/* Sync to ensure we swallow any errors we caused and reset error_caught */
XSync (xcontext->disp, FALSE);
error_caught = FALSE;
XSetErrorHandler (handler);
XSync (xcontext->disp, FALSE);
if (SHMInfo.shmaddr != ((void *) -1)) {
if (did_attach) {
XShmDetach (xcontext->disp, &SHMInfo);
XSync (xcontext->disp, FALSE);
shmdt (SHMInfo.shmaddr);
}
if (SHMInfo.shmaddr != ((void *) -1))
shmdt (SHMInfo.shmaddr);
if (SHMInfo.shmid > 0)
shmctl (SHMInfo.shmid, IPC_RMID, 0);
if (xvimage)