50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/*
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* Copyright (C) 2012-2015 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __libpbd_unwinder_h__
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#define __libpbd_unwinder_h__
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#include "pbd/libpbd_visibility.h"
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namespace PBD {
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template <typename T>
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class /*LIBPBD_API*/ Unwinder {
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public:
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Unwinder (T& var, T new_val) : _var (var), _old_val (var) { var = new_val; }
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~Unwinder () { _var = _old_val; }
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private:
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T& _var;
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T _old_val;
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};
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template <typename T>
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class /*LIBPBD_API*/ ExceptionSafeIncDec {
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public:
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ExceptionSafeIncDec (T& var) : _var (var) { _var++; }
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~ExceptionSafeIncDec () { _var--; }
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private:
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T& _var;
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};
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}
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#endif /* __libpbd_unwinder_h__ */
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