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Use a bitfield for Widget::private_flags, ::state, ::saved_state

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This recovers 10 bits, since state and saved_state as uint8 both
wasted 5 bits. Now we can add 10 more flags.

Also, a possible future patch could just do 1-bit bitfields
for the private flags instead of using manual bit twiddling.

https://bugzilla.gnome.org/show_bug.cgi?id=628884
This commit is contained in:
Havoc Pennington 2010-09-06 19:15:51 -04:00 committed by Matthias Clasen
parent d5c2cb7bcb
commit c50db9c208
1 changed files with 14 additions and 14 deletions
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28
gtk/gtkwidget.h
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@ -256,27 +256,27 @@ struct _GtkWidget
* GtkObject pointer.
*/
GtkObject object;
/* 16 bits of internally used private flags.
* this will be packed into the same 4 byte alignment frame that
* state and saved_state go. we therefore don't waste any new
* space on this.
/* internally used private flags. */
guint GSEAL (private_flags) : 16;
/* The state of the widget. There are only
* 5 widget states (defined in "gtkenums.h")
* so 3 bits.
*/
guint16 GSEAL (private_flags);
/* The state of the widget. There are actually only
* 5 widget states (defined in "gtkenums.h").
*/
guint8 GSEAL (state);
guint GSEAL (state) : 3;
/* The saved state of the widget. When a widget's state
* is changed to GTK_STATE_INSENSITIVE via
* "gtk_widget_set_state" or "gtk_widget_set_sensitive"
* the old state is kept around in this field. The state
* will be restored once the widget gets sensitive again.
*/
guint8 GSEAL (saved_state);
guint GSEAL (saved_state) : 3;
/* unused bits in our 32-bit block */
guint GSEAL (reserved) : 10;
/* The widget's name. If the widget does not have a name
* (the name is NULL), then its name (as returned by
* "gtk_widget_get_name") is its class's name.