item_with_predicate.h

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// Copyright (c) 2013-2025  Made to Order Software Corp.  All Rights Reserved
//
// https://snapwebsites.org/project/cppthread
// contact@m2osw.com
//
// 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.
#pragma once
 
// self
//
#include    <cppthread/mutex.h>
 
 
// C++
//
#include    <deque>
 
 
 
namespace cppthread
{
 
 
 
class item_with_predicate
{
public:
    typedef std::shared_ptr<item_with_predicate>
                                pointer_t;
    typedef std::weak_ptr<item_with_predicate>
                                weak_pointer_t;
    typedef std::deque<weak_pointer_t>
                                dependencies_t;
 
                                item_with_predicate(pointer_t dependency = pointer_t());
                                item_with_predicate(dependencies_t const & dependencies);
    virtual                     ~item_with_predicate();
 
    void                        add_dependency(pointer_t dependency);
    void                        add_dependencies(dependencies_t const & dependencies);
    virtual bool                valid_workload() const;
 
private:
    mutable mutex               f_mutex = mutex();
    mutable dependencies_t      f_dependencies = dependencies_t();
    mutable bool                f_processing = false;
};
 
 
 
} // namespace cppthread
// vim: ts=4 sw=4 et