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gldisplay: make readding the same context a no-op

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With e38af23044 returning the correct contexts,
gst_gl_display_add_context() was susceptible to causing infinte loops when
adding the same GstGLContext more than once.  Fix and add a test for
gst_gl_display_add_context().

Fixes glvideomixer gst-validate tests.
This commit is contained in:
Matthew Waters 2016-03-08 00:35:22 +11:00
parent 5f925a1580
commit aa6062945c
2 changed files with 100 additions and 1 deletions
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9
gst-libs/gst/gl/gstgldisplay.c
View file

@ -500,7 +500,7 @@ _check_collision (GstGLContext * context, GstGLContext * collision)
goto out;
}
if (collision == context) {
if (thread == collision_thread) {
ret = TRUE;
goto out;
}
@ -546,6 +546,13 @@ gst_gl_display_add_context (GstGLDisplay * display, GstGLContext * context)
if (thread) {
collision = _get_gl_context_for_thread_unlocked (display, thread);
g_thread_unref (thread);
/* adding the same context is a no-op */
if (context == collision) {
ret = TRUE;
goto out;
}
if (_check_collision (context, collision)) {
ret = FALSE;
goto out;

92
tests/check/libs/gstglcontext.c
View file

@ -517,6 +517,97 @@ GST_START_TEST (test_is_shared)
GST_END_TEST;
GST_START_TEST (test_display_list)
{
GstGLContext *c1, *c2;
GError *error = NULL;
c1 = gst_gl_context_new (display);
gst_gl_context_create (c1, NULL, &error);
fail_if (error != NULL, "Error creating context %s\n",
error ? error->message : "Unknown Error");
GST_OBJECT_LOCK (display);
{
/* no context added so get should return NULL */
GstGLContext *tmp =
gst_gl_display_get_gl_context_for_thread (display, NULL);
fail_unless (tmp == NULL);
}
fail_unless (gst_gl_display_add_context (display, c1));
/* re-adding the same context is a no-op */
fail_unless (gst_gl_display_add_context (display, c1));
{
GThread *thread;
GstGLContext *tmp;
thread = gst_gl_context_get_thread (c1);
fail_unless (thread != NULL);
tmp = gst_gl_display_get_gl_context_for_thread (display, thread);
fail_unless (tmp == c1);
g_thread_unref (thread);
gst_object_unref (tmp);
tmp = gst_gl_display_get_gl_context_for_thread (display, NULL);
fail_unless (tmp == c1);
gst_object_unref (tmp);
}
c2 = gst_gl_context_new (display);
gst_gl_context_create (c2, c1, &error);
fail_if (error != NULL, "Error creating context %s\n",
error ? error->message : "Unknown Error");
fail_unless (gst_gl_display_add_context (display, c2));
/* re-adding the same context is a no-op */
fail_unless (gst_gl_display_add_context (display, c2));
{
GThread *thread;
GstGLContext *tmp;
thread = gst_gl_context_get_thread (c2);
fail_unless (thread != NULL);
tmp = gst_gl_display_get_gl_context_for_thread (display, thread);
fail_unless (tmp == c2);
g_thread_unref (thread);
gst_object_unref (tmp);
/* undefined which context will be returned for the NULL thread */
tmp = gst_gl_display_get_gl_context_for_thread (display, NULL);
fail_unless (tmp != NULL);
gst_object_unref (tmp);
}
gst_object_unref (c1);
/* c1 is now dead */
{
GstGLContext *tmp;
tmp = gst_gl_display_get_gl_context_for_thread (display, NULL);
fail_unless (tmp == c2);
gst_object_unref (tmp);
}
GST_OBJECT_UNLOCK (display);
gst_object_unref (c2);
/* c2 is now dead */
{
/* no more contexts alive */
GstGLContext *tmp =
gst_gl_display_get_gl_context_for_thread (display, NULL);
fail_unless (tmp == NULL);
}
}
GST_END_TEST;
static Suite *
gst_gl_context_suite (void)
{
@ -530,6 +621,7 @@ gst_gl_context_suite (void)
tcase_add_test (tc_chain, test_current_context);
tcase_add_test (tc_chain, test_context_can_share);
tcase_add_test (tc_chain, test_is_shared);
tcase_add_test (tc_chain, test_display_list);
return s;
}