[gtk/wip/chergert/for-4-6: 26/56] macos: add re-entrancy check when monitors change

[Christian Hergert <chergert src gnome org>]

commit 2e1e7e72651089163f17b5a39d796612aa0559d9
Author: Christian Hergert <christian hergert me>
Date:   Wed Mar 2 00:32:50 2022 -0800

    macos: add re-entrancy check when monitors change

 gdk/macos/gdkmacossurface-private.h | 1 +
 gdk/macos/gdkmacossurface.c         | 7 +++++++
 2 files changed, 8 insertions(+)
---
diff --git a/gdk/macos/gdkmacossurface-private.h b/gdk/macos/gdkmacossurface-private.h
index 15a7442c17..5f1f551f93 100644
--- a/gdk/macos/gdkmacossurface-private.h
+++ b/gdk/macos/gdkmacossurface-private.h
@@ -75,6 +75,7 @@ struct _GdkMacosSurface
   guint geometry_dirty : 1;
   guint next_frame_set : 1;
   guint show_on_next_swap : 1;
+  guint in_change_monitor : 1;
   guint in_frame : 1;
   guint awaiting_frame : 1;
 };
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 42ff05385b..14cb3de015 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -1035,6 +1035,11 @@ _gdk_macos_surface_monitor_changed (GdkMacosSurface *self)
 
   g_return_if_fail (GDK_IS_MACOS_SURFACE (self));
 
+  if (self->in_change_monitor)
+    return;
+
+  self->in_change_monitor = TRUE;
+
   _gdk_macos_surface_cancel_frame (self);
 
   rect.x = self->root_x;
@@ -1103,6 +1108,8 @@ _gdk_macos_surface_monitor_changed (GdkMacosSurface *self)
 
   _gdk_macos_surface_configure (self);
   gdk_surface_invalidate_rect (GDK_SURFACE (self), NULL);
+
+  self->in_change_monitor = FALSE;
   _gdk_macos_surface_request_frame (self);
 }