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/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.
*/
#ifndef MPD_NEIGHBOR_ALL_HXX
#define MPD_NEIGHBOR_ALL_HXX
#include "check.h"
#include "util/Compiler.h"
#include "thread/Mutex.hxx"
#include <forward_list>
#include <memory>
struct ConfigData;
class EventLoop;
class NeighborExplorer;
class NeighborListener;
struct NeighborInfo;
/**
* A class that initializes and opens all configured neighbor plugins.
*/
class NeighborGlue {
struct Explorer {
std::unique_ptr<NeighborExplorer> explorer;
template<typename E>
Explorer(E &&_explorer) noexcept
:explorer(std::forward<E>(_explorer)) {}
Explorer(const Explorer &) = delete;
};
Mutex mutex;
std::forward_list<Explorer> explorers;
public:
typedef std::forward_list<NeighborInfo> List;
NeighborGlue() noexcept;
NeighborGlue(const NeighborGlue &) = delete;
~NeighborGlue() noexcept;
bool IsEmpty() const noexcept {
return explorers.empty();
}
/**
* Throws std::runtime_error on error.
*/
void Init(const ConfigData &config, EventLoop &loop,
NeighborListener &listener);
void Open();
void Close() noexcept;
/**
* Get the combined list of all neighbors from all active
* plugins.
*/
gcc_pure
List GetList() const noexcept;
};
#endif
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