queue.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef COMMON_QUEUE_H
#define COMMON_QUEUE_H

#include "common/scummsys.h"
#include "common/list.h"

namespace Common {

template<class T>
class Queue {
//public:
//  typedef T value_type;

public:
    bool empty() const {
        return _impl.empty();
    }

    void clear() {
        _impl.clear();
    }

    template<class... TArgs>
    void emplace(TArgs&&... args) {
        _impl.emplace_back(Common::forward<TArgs>(args)...);
    }

    void push(const T &x) {
        _impl.push_back(x);
    }

    void push(T &&x) {
        _impl.push_back(Common::move(x));
    }

    T &front() {
        return _impl.front();
    }

    const T &front() const {
        return _impl.front();
    }

    T &back() {
        return _impl.back();
    }

    const T &back() const {
        return _impl.back();
    }

    T pop() {
        T tmp = Common::move(front());
        _impl.pop_front();
        return tmp;
    }

    int size() const {
        return _impl.size();
    }

private:
    List<T> _impl;
};

} // End of namespace Common

#endif