diff options
Diffstat (limited to 'libs')
-rw-r--r-- | libs/pbd/pbd/unwind.h | 38 |
1 files changed, 38 insertions, 0 deletions
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 <typename T> +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__ */ |