main: Expose hooks to manage context with more granularity

This is to allow gnome-shell to tear down more gracefully. It's a stop
gap solution until there is a better context handling system, but will
have to do for now.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1775>

src/core/main-private.h

@@ -57,10 +57,4 @@ MetaDisplayPolicy meta_get_x11_display_policy (void);
 META_EXPORT_TEST
 void meta_override_x11_display_policy (MetaDisplayPolicy x11_display_policy);
 
-META_EXPORT_TEST
-void meta_start (void);
-
-META_EXPORT_TEST
-void meta_run_main_loop (void);
-
 #endif /* META_MAIN_PRIVATE_H */

src/core/main.c

@@ -358,7 +358,7 @@ meta_select_display (char *display_arg)
     g_setenv ("DISPLAY", display_name, TRUE);
 }
 
-static void
+void
 meta_finalize (void)
 {
   MetaDisplay *display = meta_get_display ();
@@ -966,6 +966,12 @@ meta_quit (MetaExitCode code)
     }
 }
 
+MetaExitCode
+meta_get_exit_code (void)
+{
+  return meta_exit_code;
+}
+
 /**
  * prefs_changed_callback:
  * @pref:  Which preference has changed

src/meta/main.h

@@ -75,5 +75,16 @@ void meta_quit (MetaExitCode code);
 META_EXPORT
 void            meta_test_init               (void);
 
+META_EXPORT
+void meta_start (void);
+
+META_EXPORT
+void meta_run_main_loop (void);
+
+META_EXPORT
+void meta_finalize (void);
+
+META_EXPORT
+MetaExitCode meta_get_exit_code (void);
 
 #endif