1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <unistd.h>
#include <gst/gst.h>
static void
handoff_identity (GstElement * element)
{
GstBin *parent;
parent = GST_BIN (gst_element_get_parent (element));
g_print ("identity handoff\n");
gst_bin_remove (parent, element);
}
gint
main (gint argc, gchar ** argv)
{
GstElement *pipeline, *src, *sink, *id;
gst_init (&argc, &argv);
g_print ("setting up...\n");
/* setup pipeline */
pipeline = gst_element_factory_make ("pipeline", NULL);
g_assert (pipeline);
src = gst_element_factory_make ("fakesrc", NULL);
g_assert (src);
id = gst_element_factory_make ("identity", NULL);
g_assert (id);
/* ref object here as it will be unparented and destroyed in the
* handoff signal, normally the scheduler should keep a ref to the
* currently scheduled elements but that's another bug displayed in
* 142183-2.c */
gst_object_ref (id);
g_signal_connect (G_OBJECT (id), "handoff", (GCallback) handoff_identity,
NULL);
g_object_set (G_OBJECT (id), "loop-based", TRUE, NULL);
sink = gst_element_factory_make ("fakesink", NULL);
g_assert (sink);
gst_bin_add_many (GST_BIN (pipeline), src, id, sink, NULL);
/* this is what triggers the bug */
gst_element_enable_threadsafe_properties (GST_ELEMENT (src));
gst_element_enable_threadsafe_properties (GST_ELEMENT (id));
gst_element_enable_threadsafe_properties (GST_ELEMENT (sink));
gst_element_link_pads (src, "src", id, "sink");
gst_element_link_pads (id, "src", sink, "sink");
if (gst_element_set_state (pipeline,
GST_STATE_PLAYING) != GST_STATE_CHANGE_SUCCESS)
g_assert_not_reached ();
gst_bin_iterate (GST_BIN (pipeline));
gst_bin_iterate (GST_BIN (pipeline));
/* 'cause we're going into deadlock mode */
alarm (5);
g_print ("adding identity back...\n");
/* add identity back in */
gst_bin_add_many (GST_BIN (pipeline), id, NULL);
g_print ("going into possible deadlock... alarm at 5 seconds\n");
gst_bin_iterate (GST_BIN (pipeline));
gst_bin_iterate (GST_BIN (pipeline));
g_print ("ok, no deadlock. bug 142183 fixed!\n");
g_print ("cleaning up...\n");
gst_object_unref (pipeline);
gst_object_unref (id);
src = id = sink = pipeline = NULL;
g_print ("done.\n");
return 0;
}
|
