condition.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_CONDITION_HPP
#define LIBTHREADAR_CONDITION_HPP
 
 
#include "mutex.hpp"
#include "exceptions.hpp"
 
#include <deque>
 
namespace libthreadar
{
 
 
 
 
    class condition : public mutex
    {
    public:
 
 
        condition(unsigned int num = 1);
 
        condition(const condition & ref) = delete;
 
        condition(condition && ref) = default;
 
        condition & operator = (const condition & ref) = delete;
 
        condition & operator = (condition && ref) noexcept = default;
 
        ~condition();
 
 
 
        void wait(unsigned int instance = 0);
 
 
        void signal(unsigned int instance = 0);
 
 
        void broadcast(unsigned int instance = 0);
 
 
        unsigned int get_waiting_thread_count(unsigned int instance = 0) const { return counter[instance]; };
 
    private:
        std::deque<pthread_cond_t> cond;
        std::deque<unsigned int> counter;
 
    };
 
 
} // end of namespace
 
#endif