[PATCH] desktop-shell: destroy data before exiting.

[Eoff, Ullysses A]

Although this is not a critical fix, it does increase unit test function
coverage when weston is run with the desktop-shell (the default)
;-)

U. Artie

>-----Original Message-----
>From: Eoff, Ullysses A
>Sent: Tuesday, October 02, 2012 9:13 PM
>To: wayland-devel at lists.freedesktop.org
>Cc: Eoff, Ullysses A
>Subject: [PATCH] desktop-shell: destroy data before exiting.
>
>From: "U. Artie Eoff" <ullysses.a.eoff at intel.com>
>
>desktop-shell never returned from display_run() since it
>was essentially killed when weston exited.  To fix this,
>it is necessary to watch for EPOLLHUP in window.c so that
>toytoolkit clients will return from display_run() when
>weston quits.  This allows for clients to clean up
>as needed.
>
>Signed-off-by: U. Artie Eoff <ullysses.a.eoff at intel.com>
>---
> clients/desktop-shell.c | 88
>+++++++++++++++++++++++++++++++++++++++++++++++++
> clients/window.c        | 21 +++++++++---
> 2 files changed, 105 insertions(+), 4 deletions(-)
>
>diff --git a/clients/desktop-shell.c b/clients/desktop-shell.c
>index 588dc1c..dc43652 100644
>--- a/clients/desktop-shell.c
>+++ b/clients/desktop-shell.c
>@@ -372,6 +372,16 @@ clock_timer_reset(struct panel_clock *clock)
> }
>
> static void
>+panel_destroy_clock(struct panel_clock *clock)
>+{
>+	widget_destroy(clock->widget);
>+
>+	close(clock->clock_fd);
>+
>+	free(clock);
>+}
>+
>+static void
> panel_add_clock(struct panel *panel)
> {
> 	struct panel_clock *clock;
>@@ -447,6 +457,39 @@ panel_configure(void *data,
> 	window_schedule_resize(panel->window, width, 32);
> }
>
>+static void
>+panel_destroy_launcher(struct panel_launcher *launcher)
>+{
>+	wl_array_release(&launcher->argv);
>+	wl_array_release(&launcher->envp);
>+
>+	free(launcher->path);
>+
>+	cairo_surface_destroy(launcher->icon);
>+
>+	widget_destroy(launcher->widget);
>+	wl_list_remove(&launcher->link);
>+
>+	free(launcher);
>+}
>+
>+static void
>+panel_destroy(struct panel *panel)
>+{
>+	struct panel_launcher *tmp;
>+	struct panel_launcher *launcher;
>+
>+	panel_destroy_clock(panel->clock);
>+
>+	wl_list_for_each_safe(launcher, tmp, &panel->launcher_list, link)
>+		panel_destroy_launcher(launcher);
>+
>+	widget_destroy(panel->widget);
>+	window_destroy(panel->window);
>+
>+	free(panel);
>+}
>+
> static struct panel *
> panel_create(struct display *display)
> {
>@@ -885,6 +928,15 @@ static const struct desktop_shell_listener listener = {
> 	desktop_shell_grab_cursor
> };
>
>+static void
>+background_destroy(struct background *background)
>+{
>+	widget_destroy(background->widget);
>+	window_destroy(background->window);
>+
>+	free(background);
>+}
>+
> static struct background *
> background_create(struct desktop *desktop)
> {
>@@ -912,6 +964,13 @@ grab_surface_enter_handler(struct widget *widget,
>struct input *input,
> }
>
> static void
>+grab_surface_destroy(struct desktop *desktop)
>+{
>+	widget_destroy(desktop->grab_widget);
>+	window_destroy(desktop->grab_window);
>+}
>+
>+static void
> grab_surface_create(struct desktop *desktop)
> {
> 	struct wl_surface *s;
>@@ -933,6 +992,27 @@ grab_surface_create(struct desktop *desktop)
> }
>
> static void
>+output_destroy(struct output *output)
>+{
>+	background_destroy(output->background);
>+	panel_destroy(output->panel);
>+	wl_output_destroy(output->output);
>+	wl_list_remove(&output->link);
>+
>+	free(output);
>+}
>+
>+static void
>+desktop_destroy_outputs(struct desktop *desktop)
>+{
>+	struct output *tmp;
>+	struct output *output;
>+
>+	wl_list_for_each_safe(output, tmp, &desktop->outputs, link)
>+		output_destroy(output);
>+}
>+
>+static void
> create_output(struct desktop *desktop, uint32_t id)
> {
> 	struct output *output;
>@@ -1043,5 +1123,13 @@ int main(int argc, char *argv[])
>
> 	display_run(desktop.display);
>
>+	/* Cleanup */
>+	grab_surface_destroy(&desktop);
>+	desktop_destroy_outputs(&desktop);
>+	if (desktop.unlock_dialog)
>+		unlock_dialog_destroy(desktop.unlock_dialog);
>+	desktop_shell_destroy(desktop.shell);
>+	display_destroy(desktop.display);
>+
> 	return 0;
> }
>diff --git a/clients/window.c b/clients/window.c
>index f3b61de..6695978 100644
>--- a/clients/window.c
>+++ b/clients/window.c
>@@ -84,6 +84,7 @@ struct display {
> 	uint32_t serial;
>
> 	int display_fd;
>+	uint32_t display_fd_events;
> 	uint32_t mask;
> 	struct task display_task;
>
>@@ -3727,7 +3728,14 @@ handle_display_data(struct task *task, uint32_t
>events)
> {
> 	struct display *display =
> 		container_of(task, struct display, display_task);
>-
>+
>+	display->display_fd_events = events;
>+
>+	if (events & EPOLLERR || events & EPOLLHUP) {
>+		display_exit(display);
>+		return;
>+	}
>+
> 	wl_display_iterate(display->display, display->mask);
> }
>
>@@ -3751,7 +3759,8 @@ display_create(int argc, char *argv[])
> 	d->epoll_fd = os_epoll_create_cloexec();
> 	d->display_fd = wl_display_get_fd(d->display, event_mask_update,
>d);
> 	d->display_task.run = handle_display_data;
>-	display_watch_fd(d, d->display_fd, EPOLLIN, &d->display_task);
>+	display_watch_fd(d, d->display_fd, EPOLLIN | EPOLLERR | EPOLLHUP,
>+			 &d->display_task);
>
> 	wl_list_init(&d->deferred_list);
> 	wl_list_init(&d->input_list);
>@@ -3815,7 +3824,8 @@ void
> display_destroy(struct display *display)
> {
> 	if (!wl_list_empty(&display->window_list))
>-		fprintf(stderr, "toytoolkit warning: windows exist.\n");
>+		fprintf(stderr, "toytoolkit warning: %d windows exist.\n",
>+			wl_list_length(&display->window_list));
>
> 	if (!wl_list_empty(&display->deferred_list))
> 		fprintf(stderr, "toytoolkit warning: deferred tasks exist.\n");
>@@ -3845,7 +3855,10 @@ display_destroy(struct display *display)
>
> 	close(display->epoll_fd);
>
>-	wl_display_flush(display->display);
>+	if (!(display->display_fd_events & EPOLLERR) &&
>+	    !(display->display_fd_events & EPOLLHUP))
>+		wl_display_flush(display->display);
>+
> 	wl_display_disconnect(display->display);
> 	free(display);
> }
>--
>1.7.11.2