subscription.cpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code 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 3 of the License, or
 * (at your option) any later version.
 *
 * Antkeeper source code 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 Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <engine/event/subscription.hpp>
#include <utility>
 
namespace event {
 
subscription::subscription(std::weak_ptr<void>&& subscriber, unsubscribe_type&& unsubscriber):
    subscriber(std::move(subscriber)),
    unsubscriber(std::move(unsubscriber))
{}
 
subscription::~subscription()
{
    unsubscribe();
}
 
bool subscription::expired() const noexcept
{
    return subscriber.expired();
}
 
void subscription::unsubscribe()
{
    if (!expired())
    {
        unsubscriber();
    }
}
 
} // namespace event