Initializer.hpp

#ifndef H_EXTENSIONS_CUTEHMI_2_INCLUDE_CUTEHMI_INITIALIZER_HPP
#define H_EXTENSIONS_CUTEHMI_2_INCLUDE_CUTEHMI_INITIALIZER_HPP
 
#include "internal/common.hpp"
#include "NonCopyable.hpp"
 
#include <functional>
 
namespace cutehmi {
 
template <class DERIVED>
class Initializer:
    public NonCopyable
{
    public:
        Initializer(std::function<void()> init, std::function<void()> deinit = nullptr);
 
    protected:
        ~Initializer();
 
    private:
        struct Members
        {
            std::function<void()> init;
            std::function<void()> deinit;
        };
 
        MPtr<Members> m;
 
        static QAtomicInt M_RefCtr;
};
 
template <class DERIVED>
QAtomicInt Initializer<DERIVED>::M_RefCtr;
 
template <class DERIVED>
Initializer<DERIVED>::Initializer(std::function<void()> init, std::function<void()> deinit):
    m(new Members{init, deinit})
{
    M_RefCtr.ref();
    if (M_RefCtr == 1)
        m->init();
}
 
template <class DERIVED>
Initializer<DERIVED>::~Initializer()
{
    if (!M_RefCtr.deref()) {
        if (m->deinit)
            m->deinit();
    }
}
 
}
 
#endif
 
//(c)C: Copyright © 2019, Michał Policht <michal@policht.pl>. All rights reserved.
//(c)C: This file is a part of CuteHMI.
//(c)C: CuteHMI is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
//(c)C: CuteHMI 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 Lesser General Public License for more details.
//(c)C: You should have received a copy of the GNU Lesser General Public License along with CuteHMI.  If not, see <https://www.gnu.org/licenses/>.