Fix wacky tabs. Apologies to anybody actually compiling right now. :)

[ardour.git] / libs / pbd / pbd / destructible.h

diff --git a/libs/pbd/pbd/destructible.h b/libs/pbd/pbd/destructible.h
index 6692ff564c742d3fb7a9109501feb2ab520b2fa2..827feb8fe5e759050800ea2ca324d726a52c29de 100644 (file)
--- a/libs/pbd/pbd/destructible.h
+++ b/libs/pbd/pbd/destructible.h
@@ -1,3 +1,22 @@
+/*
+    Copyright (C) 2000-2007 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
 #ifndef __pbd_destructible_h__
 #define __pbd_destructible_h__
 
@@ -5,14 +24,22 @@
 
 namespace PBD {
 
-class Destructible : public virtual sigc::trackable {
-  public:
-       Destructible() {}
-       virtual ~Destructible () {}
+/* be very very careful using this class. it does not inherit from sigc::trackable and thus
+   should only be used in multiple-inheritance situations involving another type
+   that does inherit from sigc::trackable (or sigc::trackable itself)
+*/
 
+class ThingWithGoingAway {
+  public:
+       virtual ~ThingWithGoingAway () {}
        sigc::signal<void> GoingAway;
+};
 
+class Destructible : public sigc::trackable, public ThingWithGoingAway {
+  public:
+       virtual ~Destructible () {}
        void drop_references () const { GoingAway(); }
+
 };
 
 }