From 567153e4fb76d44de3676a9f81b1a5f85c6b6d51 Mon Sep 17 00:00:00 2001 From: Paul Davis Date: Wed, 18 Jan 2012 01:34:53 +0000 Subject: new file, a small idea git-svn-id: svn://localhost/ardour2/branches/3.0@11257 d708f5d6-7413-0410-9779-e7cbd77b26cf --- libs/pbd/pbd/unwind.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 libs/pbd/pbd/unwind.h (limited to 'libs/pbd/pbd/unwind.h') diff --git a/libs/pbd/pbd/unwind.h b/libs/pbd/pbd/unwind.h new file mode 100644 index 0000000000..6062e1f6e1 --- /dev/null +++ b/libs/pbd/pbd/unwind.h @@ -0,0 +1,38 @@ +/* + Copyright (C) 2012 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 __libpbd_unwinder_h__ +#define __libpbd_unwinder_h__ + +namespace PBD { + +template +class Unwinder { + public: + Unwinder (T& var, T new_val) : _var (var), _old_val (var) { var = new_val; } + ~Unwinder () { _var = _old_val; } + + private: + T& _var; + T _old_val; +}; + +} + +#endif /* __libpbd_unwinder_h__ */ -- cgit v1.2.3