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[296/906] Fix callbacks passed over XEvents on 64 bit architectures

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Althought the XEvent's xclient.data.l array is an array of
longs they will be constrained to 32 bit by the X11 protocol.
On 64 bit architectures use two elements of the array to store
one pointer.
This fixes segfaults that happen at least for every example
on startup.
This commit is contained in:
Sebastian Dröge 2009-02-03 18:58:00 +01:00 committed by Matthew Waters
parent 369b1d4ff2
commit 1b531037c5
1 changed files with 48 additions and 3 deletions
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51
gst-libs/gst/gl/gstglwindow_x11.c
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@ -626,8 +626,19 @@ gst_gl_window_run_loop (GstGLWindow * window)
/* Message sent with gst_gl_window_send_message */
if (wm_gl != None && event.xclient.message_type == wm_gl) {
if (priv->running) {
#if SIZEOF_VOID_P == 8
GstGLWindowCB custom_cb =
(GstGLWindowCB) (((event.xclient.
data.l[0] & 0xffffffff) << 32) | (event.xclient.
data.l[1] & 0xffffffff));
gpointer custom_data =
(gpointer) (((event.xclient.
data.l[2] & 0xffffffff) << 32) | (event.xclient.
data.l[3] & 0xffffffff));
#else
GstGLWindowCB custom_cb = (GstGLWindowCB) event.xclient.data.l[0];
gpointer custom_data = (gpointer) event.xclient.data.l[1];
#endif
if (!custom_cb || !custom_data)
g_debug ("custom cb not initialized\n");
@ -658,8 +669,19 @@ gst_gl_window_run_loop (GstGLWindow * window)
/* message sent with gst_gl_window_quit_loop */
else if (wm_quit_loop != None
&& event.xclient.message_type == wm_quit_loop) {
#if SIZEOF_VOID_P == 8
GstGLWindowCB destroy_cb =
(GstGLWindowCB) (((event.xclient.
data.l[0] & 0xffffffff) << 32) | (event.xclient.
data.l[1] & 0xffffffff));
gpointer destroy_data =
(gpointer) (((event.xclient.
data.l[2] & 0xffffffff) << 32) | (event.xclient.
data.l[3] & 0xffffffff));
#else
GstGLWindowCB destroy_cb = (GstGLWindowCB) event.xclient.data.l[0];
gpointer destroy_data = (gpointer) event.xclient.data.l[1];
#endif
g_debug ("Quit loop message %" G_GUINT64_FORMAT "\n",
(guint64) priv->internal_win_id);
@ -670,10 +692,19 @@ gst_gl_window_run_loop (GstGLWindow * window)
/* make sure last pendings send message calls are executed */
XFlush (priv->device);
while (XCheckTypedEvent (priv->device, ClientMessage, &pending_event)) {
#if SIZEOF_VOID_P == 8
GstGLWindowCB custom_cb =
(GstGLWindowCB) pending_event.xclient.data.l[0];
gpointer custom_data = (gpointer) pending_event.xclient.data.l[1];
(GstGLWindowCB) (((event.xclient.
data.l[0] & 0xffffffff) << 32) | (event.xclient.
data.l[1] & 0xffffffff));
gpointer custom_data =
(gpointer) (((event.xclient.
data.l[2] & 0xffffffff) << 32) | (event.xclient.
data.l[3] & 0xffffffff));
#else
GstGLWindowCB custom_cb = (GstGLWindowCB) event.xclient.data.l[0];
gpointer custom_data = (gpointer) event.xclient.data.l[1];
#endif
g_debug ("execute last pending custom x events\n");
if (!custom_cb || !custom_data)
@ -773,8 +804,15 @@ gst_gl_window_quit_loop (GstGLWindow * window, GstGLWindowCB callback,
event.xclient.message_type =
XInternAtom (priv->disp_send, "WM_QUIT_LOOP", True);;
event.xclient.format = 32;
#if SIZEOF_VOID_P == 8
event.xclient.data.l[0] = (((long) callback) >> 32) & 0xffffffff;
event.xclient.data.l[1] = (((long) callback)) & 0xffffffff;
event.xclient.data.l[2] = (((long) data) >> 32) & 0xffffffff;
event.xclient.data.l[3] = (((long) data)) & 0xffffffff;
#else
event.xclient.data.l[0] = (long) callback;
event.xclient.data.l[1] = (long) data;
#endif
XSendEvent (priv->disp_send, priv->internal_win_id, FALSE, NoEventMask,
&event);
@ -805,8 +843,15 @@ gst_gl_window_send_message (GstGLWindow * window, GstGLWindowCB callback,
event.xclient.message_type =
XInternAtom (priv->disp_send, "WM_GL_WINDOW", True);
event.xclient.format = 32;
#if SIZEOF_VOID_P == 8
event.xclient.data.l[0] = (((long) callback) >> 32) & 0xffffffff;
event.xclient.data.l[1] = (((long) callback)) & 0xffffffff;
event.xclient.data.l[2] = (((long) data) >> 32) & 0xffffffff;
event.xclient.data.l[3] = (((long) data)) & 0xffffffff;
#else
event.xclient.data.l[0] = (long) callback;
event.xclient.data.l[1] = (long) data;
#endif
XSendEvent (priv->disp_send, priv->internal_win_id, FALSE, NoEventMask,
&event);