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/*
* Copyright 2003-2016 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_INSTANCE_HXX
#define MPD_INSTANCE_HXX
#include "check.h"
#include "event/Loop.hxx"
#include "event/MaskMonitor.hxx"
#include "Compiler.h"
#ifdef ENABLE_NEIGHBOR_PLUGINS
#include "neighbor/Listener.hxx"
class NeighborGlue;
#endif
#ifdef ENABLE_DATABASE
#include "db/DatabaseListener.hxx"
class Database;
class Storage;
class UpdateService;
#endif
class ClientList;
struct Partition;
class StateFile;
/**
* A utility class which, when used as the first base class, ensures
* that the #EventLoop gets initialized before the other base classes.
*/
struct EventLoopHolder {
EventLoop event_loop;
};
struct Instance final
: EventLoopHolder
#if defined(ENABLE_DATABASE) || defined(ENABLE_NEIGHBOR_PLUGINS)
,
#endif
#ifdef ENABLE_DATABASE
public DatabaseListener
#ifdef ENABLE_NEIGHBOR_PLUGINS
,
#endif
#endif
#ifdef ENABLE_NEIGHBOR_PLUGINS
public NeighborListener
#endif
{
MaskMonitor idle_monitor;
#ifdef ENABLE_NEIGHBOR_PLUGINS
NeighborGlue *neighbors;
#endif
#ifdef ENABLE_DATABASE
Database *database;
/**
* This is really a #CompositeStorage. To avoid heavy include
* dependencies, we declare it as just #Storage.
*/
Storage *storage = nullptr;
UpdateService *update = nullptr;
#endif
ClientList *client_list;
Partition *partition;
StateFile *state_file;
Instance()
:idle_monitor(event_loop, BIND_THIS_METHOD(OnIdle)), state_file(nullptr) {}
/**
* Initiate shutdown. Wrapper for EventLoop::Break().
*/
void Shutdown() {
event_loop.Break();
}
void EmitIdle(unsigned mask) {
idle_monitor.OrMask(mask);
}
#ifdef ENABLE_DATABASE
/**
* Returns the global #Database instance. May return nullptr
* if this MPD configuration has no database (no
* music_directory was configured).
*/
Database *GetDatabase() {
return database;
}
/**
* Returns the global #Database instance. Throws
* DatabaseError if this MPD configuration has no database (no
* music_directory was configured).
*/
gcc_pure
const Database &GetDatabaseOrThrow() const;
#endif
private:
#ifdef ENABLE_DATABASE
void OnDatabaseModified() override;
void OnDatabaseSongRemoved(const char *uri) override;
#endif
#ifdef ENABLE_NEIGHBOR_PLUGINS
/* virtual methods from class NeighborListener */
void FoundNeighbor(const NeighborInfo &info) override;
void LostNeighbor(const NeighborInfo &info) override;
#endif
/* callback for #idle_monitor */
void OnIdle(unsigned mask);
};
#endif
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