genericguard.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
  This file is part of the Open Porous Media project (OPM).
 
  OPM 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.
 
  OPM 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 OPM.  If not, see <http://www.gnu.org/licenses/>.
 
  Consult the COPYING file in the top-level source directory of this
  module for the precise wording of the license and the list of
  copyright holders.
*/
#ifndef EWOMS_GENERIC_GUARD_HH
#define EWOMS_GENERIC_GUARD_HH
 
namespace Opm {
template <class Callback>
class GenericGuard
{
public:
    GenericGuard(Callback& callback)
        : callback_(callback)
        , isEnabled_(true)
    { }
 
    // allow moves
    GenericGuard(GenericGuard&& other)
        : callback_(other.callback_)
        , isEnabled_(other.isEnabled_)
    {
        other.isEnabled_ = false;
    }
 
    // disable copies
    GenericGuard(const GenericGuard& other) = delete;
 
    ~GenericGuard()
    {
        if (isEnabled_)
            callback_();
    }
 
    void setEnabled(bool value)
    { isEnabled_ = value; }
 
    bool enabled() const
    { return isEnabled_; }
 
private:
    Callback& callback_;
    bool isEnabled_;
};
 
template <class Callback>
GenericGuard<Callback> make_guard(Callback& callback)
{ return GenericGuard<Callback>(callback); }
 
} // namespace Opm
 
#endif