CRNAtScopeExit.h

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/* Copyright 2009-2015 INSA Lyon
 * 
 * This file is part of libcrn.
 * 
 * libcrn 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.
 * 
 * libcrn 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.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with libcrn.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * file: CRNAtScopeExit.h
 * \author Yann LEYDIER
 */

#ifndef CRNAtScopeExit_HEADER
#define CRNAtScopeExit_HEADER

#include <functional>

namespace crn
{
    class Destroyer
    {
        public:
            Destroyer(const std::function<void(void)> &f):atdestroy(f) { }
            Destroyer(std::function<void(void)> &&f):atdestroy(std::move(f)) { }
            ~Destroyer() { atdestroy(); }
        private:
            std::function<void(void)> atdestroy;
    };
}

#define CRNAtScopeExit_UNIFY_VAR(VAR) CRNAtScopeExit_UNIFY_VAR2(VAR,__LINE__)

#define CRNAtScopeExit_UNIFY_VAR2(VAR,CODE) CRNAtScopeExit_UNIFY_VAR3(VAR,CODE)

#define CRNAtScopeExit_UNIFY_VAR3(VAR,CODE) VAR##CODE

#define AtScopeExit(functor) crn::Destroyer CRNAtScopeExit_UNIFY_VAR(at_scope_exit)(functor)

#endif