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Move window pings to MetaWindow

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This will make it possible to use on Wayland as well...
This commit is contained in:
Jasper St. Pierre 2013-11-21 14:01:40 -05:00
parent 8a3501ffe1
commit aa3643cdde
5 changed files with 245 additions and 326 deletions
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22
src/core/delete.c
View File

@ -43,14 +43,11 @@ static void meta_window_present_delete_dialog (MetaWindow *window,
guint32 timestamp);
static void
delete_ping_reply_func (MetaDisplay *display,
Window xwindow,
delete_ping_reply_func (MetaWindow *window,
guint32 timestamp,
void *user_data)
{
meta_topic (META_DEBUG_PING,
"Got reply to delete ping for %s\n",
((MetaWindow*)user_data)->desc);
meta_topic (META_DEBUG_PING, "Got reply to delete ping for %s\n", window->desc);
/* we do nothing */
}
@ -68,12 +65,10 @@ dialog_exited (GPid pid, int status, gpointer user_data)
}
static void
delete_ping_timeout_func (MetaDisplay *display,
Window xwindow,
delete_ping_timeout_func (MetaWindow *window,
guint32 timestamp,
void *user_data)
{
MetaWindow *window = user_data;
char *window_title;
gchar *window_content, *tmp;
GPid dialog_pid;
@ -137,12 +132,11 @@ void
meta_window_check_alive (MetaWindow *window,
guint32 timestamp)
{
meta_display_ping_window (window->display,
window,
timestamp,
delete_ping_reply_func,
delete_ping_timeout_func,
window);
meta_window_ping (window,
timestamp,
delete_ping_reply_func,
delete_ping_timeout_func,
NULL);
}
void

16
src/core/display-private.h
View File

@ -57,11 +57,6 @@ typedef struct _MetaWindowPropHooks MetaWindowPropHooks;
typedef struct MetaEdgeResistanceData MetaEdgeResistanceData;
typedef void (* MetaWindowPingFunc) (MetaDisplay *display,
Window xwindow,
guint32 timestamp,
gpointer user_data);
typedef enum {
META_LIST_DEFAULT = 0, /* normal windows */
META_LIST_INCLUDE_OVERRIDE_REDIRECT = 1 << 0, /* normal and O-R */
@ -182,7 +177,7 @@ struct _MetaDisplay
guint32 window_sequence_counter;
/* Pings which we're waiting for a reply from */
GSList *pending_pings;
GHashTable *pending_pings;
/* Pending focus change */
guint focus_timeout_id;
@ -448,15 +443,6 @@ void meta_display_retheme_all (void);
void meta_display_set_cursor_theme (const char *theme,
int size);
void meta_display_ping_window (MetaDisplay *display,
MetaWindow *window,
guint32 timestamp,
MetaWindowPingFunc ping_reply_func,
MetaWindowPingFunc ping_timeout_func,
void *user_data);
gboolean meta_display_window_has_pending_pings (MetaDisplay *display,
MetaWindow *window);
int meta_resize_gravity_from_grab_op (MetaGrabOp op);
gboolean meta_grab_op_is_moving (MetaGrabOp op);

306
src/core/display.c
View File

@ -83,41 +83,6 @@
g == META_GRAB_OP_KEYBOARD_ESCAPING_DOCK || \
g == META_GRAB_OP_KEYBOARD_ESCAPING_GROUP)
/*
* SECTION:pings
*
* Sometimes we want to see whether a window is responding,
* so we send it a "ping" message and see whether it sends us back a "pong"
* message within a reasonable time. Here we have a system which lets us
* nominate one function to be called if we get the pong in time and another
* function if we don't. The system is rather more complicated than it needs
* to be, since we only ever use it to destroy windows which are asked to
* close themselves and don't do so within a reasonable amount of time, and
* therefore we always use the same callbacks. It's possible that we might
* use it for other things in future, or on the other hand we might decide
* that we're never going to do so and simplify it a bit.
*/
/**
* MetaPingData:
*
* Describes a ping on a window. When we send a ping to a window, we build
* one of these structs, and it eventually gets passed to the timeout function
* or to the function which handles the response from the window. If the window
* does or doesn't respond to the ping, we use this information to deal with
* these facts; we have a handler function for each.
*/
typedef struct
{
MetaDisplay *display;
Window xwindow;
guint32 timestamp;
MetaWindowPingFunc ping_reply_func;
MetaWindowPingFunc ping_timeout_func;
void *user_data;
guint ping_timeout_id;
} MetaPingData;
G_DEFINE_TYPE(MetaDisplay, meta_display, G_TYPE_OBJECT);
/* Signals */
@ -172,8 +137,6 @@ static guint32 event_get_time (MetaDisplay *display,
XEvent *event);
static void process_request_frame_extents (MetaDisplay *display,
XEvent *event);
static void process_pong_message (MetaDisplay *display,
XEvent *event);
static void process_selection_request (MetaDisplay *display,
XEvent *event);
static void process_selection_clear (MetaDisplay *display,
@ -321,62 +284,6 @@ meta_display_class_init (MetaDisplayClass *klass)
G_PARAM_READABLE));
}
/**
* ping_data_free:
*
* Destructor for #MetaPingData structs. Will destroy the
* event source for the struct as well.
*/
static void
ping_data_free (MetaPingData *ping_data)
{
/* Remove the timeout */
if (ping_data->ping_timeout_id != 0)
g_source_remove (ping_data->ping_timeout_id);
g_free (ping_data);
}
/**
* remove_pending_pings_for_window:
* @display: The display the window appears on
* @xwindow: The X ID of the window whose pings we should remove
*
* Frees every pending ping structure for the given X window on the
* given display. This means that we also destroy the timeouts.
*/
static void
remove_pending_pings_for_window (MetaDisplay *display, Window xwindow)
{
GSList *tmp;
GSList *dead;
/* could obviously be more efficient, don't care */
/* build list to be removed */
dead = NULL;
for (tmp = display->pending_pings; tmp; tmp = tmp->next)
{
MetaPingData *ping_data = tmp->data;
if (ping_data->xwindow == xwindow)
dead = g_slist_prepend (dead, ping_data);
}
/* remove what we found */
for (tmp = dead; tmp; tmp = tmp->next)
{
MetaPingData *ping_data = tmp->data;
display->pending_pings = g_slist_remove (display->pending_pings, ping_data);
ping_data_free (ping_data);
}
g_slist_free (dead);
}
#ifdef HAVE_STARTUP_NOTIFICATION
static void
sn_error_trap_push (SnDisplay *sn_display,
@ -528,7 +435,6 @@ meta_display_open (void)
the_display->server_grab_count = 0;
the_display->display_opening = TRUE;
the_display->pending_pings = NULL;
the_display->autoraise_timeout_id = 0;
the_display->autoraise_window = NULL;
the_display->focus_window = NULL;
@ -600,6 +506,8 @@ meta_display_open (void)
the_display->xids = g_hash_table_new (meta_unsigned_long_hash,
meta_unsigned_long_equal);
the_display->pending_pings = g_hash_table_new (meta_unsigned_long_hash,
meta_unsigned_long_equal);
the_display->wayland_windows = g_hash_table_new (NULL, NULL);
i = 0;
@ -2887,7 +2795,13 @@ handle_other_xevent (MetaDisplay *display,
if ((Atom)event->xclient.data.l[0] == display->atom__NET_WM_PING)
{
process_pong_message (display, event);
guint32 timestamp = event->xclient.data.l[1];
window = g_hash_table_lookup (display->pending_pings, &timestamp);
if (window)
meta_window_pong (window, timestamp);
else
meta_verbose ("Received invalid _NET_WM_PING for unknown timestamp %d\n", timestamp);
/* We don't want ping reply events going into
* the GTK+ event loop because gtk+ will treat
@ -3794,9 +3708,6 @@ meta_display_unregister_x_window (MetaDisplay *display,
g_return_if_fail (g_hash_table_lookup (display->xids, &xwindow) != NULL);
g_hash_table_remove (display->xids, &xwindow);
/* Remove any pending pings */
remove_pending_pings_for_window (display, xwindow);
}
void
@ -4644,120 +4555,6 @@ meta_set_syncing (gboolean setting)
}
}
/*
* How long, in milliseconds, we should wait after pinging a window
* before deciding it's not going to get back to us.
*/
#define PING_TIMEOUT_DELAY 5000
/**
* meta_display_ping_timeout:
* @data: All the information about this ping. It is a #MetaPingData
* cast to a #gpointer in order to be passable to a timeout function.
* This function will also free this parameter.
*
* Does whatever it is we decided to do when a window didn't respond
* to a ping. We also remove the ping from the display's list of
* pending pings. This function is called by the event loop when the timeout
* times out which we created at the start of the ping.
*
* Returns: Always returns %FALSE, because this function is called as a
* timeout and we don't want to run the timer again.
*/
static gboolean
meta_display_ping_timeout (gpointer data)
{
MetaPingData *ping_data;
ping_data = data;
ping_data->ping_timeout_id = 0;
meta_topic (META_DEBUG_PING,
"Ping %u on window %lx timed out\n",
ping_data->timestamp, ping_data->xwindow);
(* ping_data->ping_timeout_func) (ping_data->display, ping_data->xwindow,
ping_data->timestamp, ping_data->user_data);
ping_data->display->pending_pings =
g_slist_remove (ping_data->display->pending_pings,
ping_data);
ping_data_free (ping_data);
return FALSE;
}
/**
* meta_display_ping_window:
* @display: The #MetaDisplay that the window is on
* @window: The #MetaWindow to send the ping to
* @timestamp: The timestamp of the ping. Used for uniqueness.
* Cannot be CurrentTime; use a real timestamp!
* @ping_reply_func: The callback to call if we get a response.
* @ping_timeout_func: The callback to call if we don't get a response.
* @user_data: Arbitrary data that will be passed to the callback
* function. (In practice it's often a pointer to
* the window.)
*
* Sends a ping request to a window. The window must respond to
* the request within a certain amount of time. If it does, we
* will call one callback; if the time passes and we haven't had
* a response, we call a different callback. The window must have
* the hint showing that it can respond to a ping; if it doesn't,
* we call the "got a response" callback immediately and return.
* This function returns straight away after setting things up;
* the callbacks will be called from the event loop.
*
* FIXME: This should probably be a method on windows, rather than displays
* for one of their windows.
*
*/
void
meta_display_ping_window (MetaDisplay *display,
MetaWindow *window,
guint32 timestamp,
MetaWindowPingFunc ping_reply_func,
MetaWindowPingFunc ping_timeout_func,
gpointer user_data)
{
MetaPingData *ping_data;
if (timestamp == CurrentTime)
{
meta_warning ("Tried to ping a window with CurrentTime! Not allowed.\n");
return;
}
if (!window->net_wm_ping)
{
if (ping_reply_func)
(* ping_reply_func) (display, window->xwindow, timestamp, user_data);
return;
}
ping_data = g_new (MetaPingData, 1);
ping_data->display = display;
ping_data->xwindow = window->xwindow;
ping_data->timestamp = timestamp;
ping_data->ping_reply_func = ping_reply_func;
ping_data->ping_timeout_func = ping_timeout_func;
ping_data->user_data = user_data;
ping_data->ping_timeout_id = g_timeout_add (PING_TIMEOUT_DELAY,
meta_display_ping_timeout,
ping_data);
display->pending_pings = g_slist_prepend (display->pending_pings, ping_data);
meta_topic (META_DEBUG_PING,
"Sending ping with timestamp %u to window %s\n",
timestamp, window->desc);
meta_window_send_icccm_message (window,
display->atom__NET_WM_PING,
timestamp);
}
static void
process_request_frame_extents (MetaDisplay *display,
XEvent *event)
@ -4818,91 +4615,6 @@ process_request_frame_extents (MetaDisplay *display,
meta_XFree (hints);
}
/**
* process_pong_message:
* @display: the display we got the pong from
* @event: the #XEvent which is a pong; we can tell which
* ping it corresponds to because it bears the
* same timestamp.
*
* Process the pong (the response message) from the ping we sent
* to the window. This involves removing the timeout, calling the
* reply handler function, and freeing memory.
*/
static void
process_pong_message (MetaDisplay *display,
XEvent *event)
{
GSList *tmp;
guint32 timestamp = event->xclient.data.l[1];
meta_topic (META_DEBUG_PING, "Received a pong with timestamp %u\n",
timestamp);
for (tmp = display->pending_pings; tmp; tmp = tmp->next)
{
MetaPingData *ping_data = tmp->data;
if (timestamp == ping_data->timestamp)
{
meta_topic (META_DEBUG_PING,
"Matching ping found for pong %u\n",
ping_data->timestamp);
/* Remove the ping data from the list */
display->pending_pings = g_slist_remove (display->pending_pings,
ping_data);
/* Remove the timeout */
if (ping_data->ping_timeout_id != 0)
{
g_source_remove (ping_data->ping_timeout_id);
ping_data->ping_timeout_id = 0;
}
/* Call callback */
(* ping_data->ping_reply_func) (display,
ping_data->xwindow,
ping_data->timestamp,
ping_data->user_data);
ping_data_free (ping_data);
break;
}
}
}
/**
* meta_display_window_has_pending_pings:
* @display: The #MetaDisplay of the window.
* @window: The #MetaWindow whose pings we want to know about.
*
* Finds whether a window has any pings waiting on it.
*
* FIXME: This should probably be a method on windows, rather than displays
* for one of their windows.
*
* Returns: %TRUE if there is at least one ping which has been sent
* to the window without getting a response; %FALSE otherwise.
*/
gboolean
meta_display_window_has_pending_pings (MetaDisplay *display,
MetaWindow *window)
{
GSList *tmp;
for (tmp = display->pending_pings; tmp; tmp = tmp->next)
{
MetaPingData *ping_data = tmp->data;
if (ping_data->xwindow == window->xwindow)
return TRUE;
}
return FALSE;
}
MetaGroup*
get_focussed_group (MetaDisplay *display)
{

14
src/core/window-private.h
View File

@ -466,6 +466,8 @@ struct _MetaWindow
/* Bypass compositor hints */
guint bypass_compositor;
GSList *pending_pings;
};
struct _MetaWindowClass
@ -747,4 +749,16 @@ void meta_window_handle_enter (MetaWindow *window,
void meta_window_set_surface_mapped (MetaWindow *window,
gboolean surface_mapped);
typedef void (* MetaWindowPingFunc) (MetaWindow *window,
guint32 timestamp,
gpointer user_data);
void meta_window_ping (MetaWindow *window,
guint32 timestamp,
MetaWindowPingFunc ping_reply_func,
MetaWindowPingFunc ping_timeout_func,
void *user_data);
void meta_window_pong (MetaWindow *window,
guint32 timestamp);
#endif

213
src/core/window.c
View File

@ -73,6 +73,26 @@
static int destroying_windows_disallowed = 0;
/**
* MetaPingData:
*
* Describes a ping on a window. When we send a ping to a window, we build
* one of these structs, and it eventually gets passed to the timeout function
* or to the function which handles the response from the window. If the window
* does or doesn't respond to the ping, we use this information to deal with
* these facts; we have a handler function for each.
*/
typedef struct
{
MetaWindow *window;
guint32 timestamp;
MetaWindowPingFunc ping_reply_func;
MetaWindowPingFunc ping_timeout_func;
void *user_data;
guint ping_timeout_id;
} MetaPingData;
static void ping_data_free (MetaPingData *ping_data);
static void update_sm_hints (MetaWindow *window);
static void update_net_frame_extents (MetaWindow *window);
@ -2051,6 +2071,8 @@ meta_window_unmanage (MetaWindow *window,
if (window->surface)
meta_wayland_surface_free (window->surface);
g_slist_free_full (window->pending_pings, (GDestroyNotify) ping_data_free);
meta_prefs_remove_listener (prefs_changed_callback, window);
meta_screen_queue_check_fullscreen (window->screen);
@ -11960,3 +11982,194 @@ meta_window_set_surface_mapped (MetaWindow *window,
window->surface_mapped = surface_mapped;
meta_window_queue (window, META_QUEUE_CALC_SHOWING);
}
/*
* SECTION:pings
*
* Sometimes we want to see whether a window is responding,
* so we send it a "ping" message and see whether it sends us back a "pong"
* message within a reasonable time. Here we have a system which lets us
* nominate one function to be called if we get the pong in time and another
* function if we don't. The system is rather more complicated than it needs
* to be, since we only ever use it to destroy windows which are asked to
* close themselves and don't do so within a reasonable amount of time, and
* therefore we always use the same callbacks. It's possible that we might
* use it for other things in future, or on the other hand we might decide
* that we're never going to do so and simplify it a bit.
*/
/**
* ping_data_free:
*
* Destructor for #MetaPingData structs. Will destroy the
* event source for the struct as well.
*/
static void
ping_data_free (MetaPingData *ping_data)
{
MetaWindow *window = ping_data->window;
MetaDisplay *display = window->display;
/* Remove the timeout */
if (ping_data->ping_timeout_id != 0)
g_source_remove (ping_data->ping_timeout_id);
g_hash_table_remove (display->pending_pings, &ping_data->timestamp);
g_free (ping_data);
}
/**
* meta_window_pong:
* @window: the window we got the pong on
* @timestamp: the timestamp that the client sent back
*
* Process the pong (the response message) from the ping we sent
* to the window. This involves removing the timeout, calling the
* reply handler function, and freeing memory.
*/
void
meta_window_pong (MetaWindow *window,
guint32 timestamp)
{
GSList *tmp;
meta_topic (META_DEBUG_PING, "Received a pong with timestamp %u\n",
timestamp);
for (tmp = window->pending_pings; tmp; tmp = tmp->next)
{
MetaPingData *ping_data = tmp->data;
if (timestamp == ping_data->timestamp)
{
meta_topic (META_DEBUG_PING,
"Matching ping found for pong %u\n",
ping_data->timestamp);
/* Remove the ping data from the list */
window->pending_pings = g_slist_remove (window->pending_pings, ping_data);
/* Remove the timeout */
if (ping_data->ping_timeout_id != 0)
{
g_source_remove (ping_data->ping_timeout_id);
ping_data->ping_timeout_id = 0;
}
/* Call callback */
(* ping_data->ping_reply_func) (window,
ping_data->timestamp,
ping_data->user_data);
/* Remove the ping data from the list */
window->pending_pings = g_slist_remove (window->pending_pings, ping_data);
ping_data_free (ping_data);
break;
}
}
}
/*
* How long, in milliseconds, we should wait after pinging a window
* before deciding it's not going to get back to us.
*/
#define PING_TIMEOUT_DELAY 5000
/**
* ping_timeout:
* @data: All the information about this ping. It is a #MetaPingData
* cast to a #gpointer in order to be passable to a timeout function.
* This function will also free this parameter.
*
* Does whatever it is we decided to do when a window didn't respond
* to a ping. We also remove the ping from the display's list of
* pending pings. This function is called by the event loop when the timeout
* times out which we created at the start of the ping.
*
* Returns: Always returns %FALSE, because this function is called as a
* timeout and we don't want to run the timer again.
*/
static gboolean
ping_timeout (gpointer data)
{
MetaPingData *ping_data;
ping_data = data;
ping_data->ping_timeout_id = 0;
meta_topic (META_DEBUG_PING,
"Ping %u on window %s timed out\n",
ping_data->timestamp, ping_data->window->desc);
(* ping_data->ping_timeout_func) (ping_data->window, ping_data->timestamp, ping_data->user_data);
ping_data_free (ping_data);
return FALSE;
}
/**
* meta_window_ping:
* @window: The #MetaWindow to send the ping to
* @timestamp: The timestamp of the ping. Used for uniqueness.
* Cannot be CurrentTime; use a real timestamp!
* @ping_reply_func: The callback to call if we get a response.
* @ping_timeout_func: The callback to call if we don't get a response.
* @user_data: Arbitrary data that will be passed to the callback
* function. (In practice it's often a pointer to
* the window.)
*
* Sends a ping request to a window. The window must respond to
* the request within a certain amount of time. If it does, we
* will call one callback; if the time passes and we haven't had
* a response, we call a different callback. The window must have
* the hint showing that it can respond to a ping; if it doesn't,
* we call the "got a response" callback immediately and return.
* This function returns straight away after setting things up;
* the callbacks will be called from the event loop.
*/
void
meta_window_ping (MetaWindow *window,
guint32 timestamp,
MetaWindowPingFunc ping_reply_func,
MetaWindowPingFunc ping_timeout_func,
gpointer user_data)
{
MetaPingData *ping_data;
MetaDisplay *display = window->display;
if (timestamp == CurrentTime)
{
meta_warning ("Tried to ping a window with CurrentTime! Not allowed.\n");
return;
}
if (!window->net_wm_ping)
{
if (ping_reply_func)
(* ping_reply_func) (window, timestamp, user_data);
return;
}
ping_data = g_new (MetaPingData, 1);
ping_data->window = window;
ping_data->timestamp = timestamp;
ping_data->ping_reply_func = ping_reply_func;
ping_data->ping_timeout_func = ping_timeout_func;
ping_data->user_data = user_data;
ping_data->ping_timeout_id = g_timeout_add (PING_TIMEOUT_DELAY, ping_timeout, ping_data);
g_hash_table_insert (display->pending_pings, &ping_data->timestamp, window);
meta_topic (META_DEBUG_PING,
"Sending ping with timestamp %u to window %s\n",
timestamp, window->desc);
meta_window_send_icccm_message (window,
display->atom__NET_WM_PING,
timestamp);
}