semaphore.hpp

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/*********************************************************************/
// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2025 Denis Corbin
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// to contact the author, see the AUTHOR file
/*********************************************************************/
 
 
#ifndef SEMAPHORE_HPP
#define SEMAPHORE_HPP
 
#include "../my_config.h"
 
#include "mem_ui.hpp"
#include "mask.hpp"
 
namespace libdar
{
 
 
 
 
    class semaphore : public mem_ui
    {
    public:
 
 
    semaphore(const std::shared_ptr<user_interaction> & dialog,
          const std::string & backup_hook_file_execute,
          const mask & backup_hook_file_mask);
 
    semaphore(const semaphore & ref) : mem_ui(ref) { copy_from(ref); };
 
    semaphore(semaphore && ref) noexcept: mem_ui(std::move(ref)) { nullifyptr(); move_from(std::move(ref)); };
 
    semaphore & operator = (const semaphore & ref) { detruit(); copy_from(ref); return *this; };
 
    semaphore & operator = (semaphore && ref) noexcept { move_from(std::move(ref)); return *this; };
 
    ~semaphore() { detruit(); };
 
 
    void raise(const std::string & path,
           const cat_entree *object,
           bool data_to_save);
 
    void lower();
 
    private:
    infinint count;       
    std::string chem;     
    std::string filename; 
    infinint uid;         
    infinint gid;         
    unsigned char sig;    
    std::string execute;  
    const mask *match;    
 
    void nullifyptr() noexcept { match = nullptr; };
    std::string build_string(const std::string & context);
    void copy_from(const semaphore & ref);
    void move_from(semaphore && ref) noexcept;
    void detruit();
    };
 
 
} // end of namespace
 
#endif