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windowManager: Wait for X11 services using systemd

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To do this, we now wait for the start/stop job to complete. We also have
two targets in gnome-session to ensure that everything is working as
expected.

In order to start the services, we simply request the
gnome-session-x11-services-ready.target unit, and wait for it to become
available. To stop, we use the gnome-session-x11-services.target unit
which should stop all services in a way that is entirely race free.

This requires both gnome-session and gnome-settings-daemon changes to
work (which are in the corresponding merge requests).

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/895
This commit is contained in:
Benjamin Berg
2019-12-13 19:07:16 +01:00
committed by Benjamin Berg
parent 41d5b1455f
commit 01a927f388
3 changed files with 263 additions and 72 deletions
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21
src/shell-util.h
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@ -59,12 +59,21 @@ cairo_surface_t * shell_util_composite_capture_images (ClutterCapture *captures
void shell_util_check_cloexec_fds (void);
gboolean shell_util_start_systemd_unit (const char *unit,
const char *mode,
GError **error);
gboolean shell_util_stop_systemd_unit (const char *unit,
const char *mode,
GError **error);
void shell_util_start_systemd_unit (const char *unit,
const char *mode,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
gboolean shell_util_start_systemd_unit_finish (GAsyncResult *res,
GError **error);
void shell_util_stop_systemd_unit (const char *unit,
const char *mode,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
gboolean shell_util_stop_systemd_unit_finish (GAsyncResult *res,
GError **error);
void shell_util_sd_notify (void);