core: send out "Reloading" signal before and after doing a full reload/reexec of PID 1

Since we'll unload all units/job during a reload, and then readd them it
is really useful for clients to be aware of this phase hence sent a
signal out before and after. This signal is called "Reloading" (despite
the fact that it is also sent out during reexecution, which we consider
a special case in this context) and has one boolean parameter which is
true for the signal sent before the reload, and false for the signal
after the reload. The UnitRemoved/JobRremoved and UnitNew/JobNew due to
the reloading are guranteed to be between the pair of Reloading
messages.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/core/dbus.h b/src/core/dbus.h
index b5c28c6ab6..6500cd7455 100644
--- a/src/core/dbus.h
+++ b/src/core/dbus.h
@@ -43,6 +43,7 @@ bool bus_connection_has_subscriber(Manager *m, DBusConnection *c);
 int bus_fdset_add_all(Manager *m, FDSet *fds);
 
 void bus_broadcast_finished(Manager *m, usec_t firmware_usec, usec_t loader_usec, usec_t kernel_usec, usec_t initrd_usec, usec_t userspace_usec, usec_t total_usec);
+void bus_broadcast_reloading(Manager *m, bool active);
 
 Set *bus_acquire_subscribed(Manager *m, DBusConnection *c);