thread_signal.hpp

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/*********************************************************************/
// libthreadar - is a library providing several C++ classes to work with threads
// Copyright (C) 2014-2025 Denis Corbin
//
// This file is part of libthreadar
//
//  libthreadar 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.
//
//  libhtreadar 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 libthreadar.  If not, see <http://www.gnu.org/licenses/>
//
//----
//  to contact the author: dar.linux@free.fr
/*********************************************************************/
 
#ifndef LIBTHREADAR_THREAD_SIGNAL_HPP
#define LIBTHREADAR_THREAD_SIGNAL_HPP
 
 
#include "config.h"
 
    // C system headers
 
    // C++ standard headers
 
 
    // libthreadar headers
#include "thread.hpp"
 
namespace libthreadar
{
 
 
 
    class thread_signal: public thread
    {
    public:
        thread_signal();
 
        thread_signal(const thread_signal & ref) = delete;
        thread_signal(thread_signal && ref) noexcept = default;
        thread_signal & operator = (const thread_signal & ref) = delete;
        thread_signal & operator = (thread_signal && ref) noexcept = default;
 
        virtual ~thread_signal() = default; // no thread to cancel nor data to cleanup here
 
 
        virtual void set_signal_mask(const sigset_t & mask) override;
 
 
 
        static void change_default_signal(int sig);
 
    protected:
 
 
        virtual void signaled_inherited_cancel() {};
 
    private:
 
        virtual void inherited_cancel() override;
 
        void send_signal();
 
        static mutex verrou;
        static bool initialized;
        static int awaking_signal;
 
        static void set_signal_handler();
        static void handler(int sig);
    };
 
} // end of namespace
 
#endif