Main: move global variables to struct Instance

More preparations for multi-player support.

Makefile.am

@@ -186,6 +186,7 @@ src_mpd_SOURCES = \
 	src/io_error.h \
 	src/IOThread.cxx src/IOThread.hxx \
 	src/Main.cxx src/Main.hxx \
+	src/Instance.cxx src/Instance.hxx \
 	src/Win32Main.cxx \
 	src/GlobalEvents.cxx src/GlobalEvents.hxx \
 	src/daemon.c \

src/ClientNew.cxx

@@ -21,7 +21,7 @@
 #include "ClientInternal.hxx"
 #include "ClientList.hxx"
 #include "Partition.hxx"
-#include "Main.hxx"
+#include "Instance.hxx"
 #include "fd_util.h"
 extern "C" {
 #include "resolver.h"
@@ -95,7 +95,8 @@ client_new(EventLoop &loop, Partition &partition,
 	}
 #endif	/* HAVE_WRAP */
 
-	if (client_list->IsFull()) {
+	ClientList &client_list = *partition.instance.client_list;
+	if (client_list.IsFull()) {
 		g_warning("Max Connections Reached!");
 		close_socket(fd);
 		return;
@@ -106,7 +107,7 @@ client_new(EventLoop &loop, Partition &partition,
 
 	(void)send(fd, GREETING, sizeof(GREETING) - 1, 0);
 
-	client_list->Add(*client);
+	client_list.Add(*client);
 
 	remote = sockaddr_to_string(sa, sa_length, NULL);
 	g_log(G_LOG_DOMAIN, LOG_LEVEL_SECURE,
@@ -117,7 +118,7 @@ client_new(EventLoop &loop, Partition &partition,
 void
 Client::Close()
 {
-	client_list->Remove(*this);
+	partition.instance.client_list->Remove(*this);
 
 	SetExpired();
 

src/Instance.cxx

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2003-2013 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.
+ */
+
+#include "config.h"
+#include "Instance.hxx"
+#include "Partition.hxx"
+#include "Idle.hxx"
+
+void
+Instance::DeleteSong(const song &song)
+{
+	partition->DeleteSong(song);
+}
+
+void
+Instance::DatabaseModified()
+{
+	partition->playlist.FullIncrementVersions();
+	idle_add(IDLE_DATABASE);
+}
+
+void
+Instance::TagModified()
+{
+	partition->playlist.TagChanged();
+}
+
+void
+Instance::SyncWithPlayer()
+{
+	partition->playlist.SyncWithPlayer(partition->pc);
+}

src/Instance.hxx

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2003-2013 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"
+
+class ClientList;
+struct Partition;
+struct song;
+
+struct Instance {
+	ClientList *client_list;
+
+	Partition *partition;
+
+	void DeleteSong(const song &song);
+
+	/**
+	 * The database has been modified.  Propagate the change to
+	 * all subsystems.
+	 */
+	void DatabaseModified();
+
+	/**
+	 * A tag in the play queue has been modified.  Propagate the
+	 * change to all subsystems.
+	 */
+	void TagModified();
+
+	/**
+	 * Synchronize the player with the play queue.
+	 */
+	void SyncWithPlayer();
+};
+
+#endif

src/Listen.cxx

@@ -20,6 +20,7 @@
 #include "config.h"
 #include "Listen.hxx"
 #include "Main.hxx"
+#include "Instance.hxx"
 #include "Client.hxx"
 #include "conf.h"
 #include "event/ServerSocket.hxx"
@@ -43,7 +44,7 @@ public:
 private:
 	virtual void OnAccept(int fd, const sockaddr &address,
 			      size_t address_length, int uid) {
-		client_new(*main_loop, *global_partition,
+		client_new(*main_loop, *instance->partition,
 			   fd, &address, address_length, uid);
 	}
 };

src/Main.cxx

@@ -19,6 +19,7 @@
 
 #include "config.h"
 #include "Main.hxx"
+#include "Instance.hxx"
 #include "CommandLine.hxx"
 #include "PlaylistFile.hxx"
 #include "PlaylistGlobal.hxx"
@@ -97,9 +98,7 @@ enum {
 GThread *main_task;
 EventLoop *main_loop;
 
-ClientList *client_list;
+Instance *instance;
-
-Partition *global_partition;
 
 static StateFile *state_file;
 
@@ -251,7 +250,7 @@ glue_state_file_init(GError **error_r)
 	}
 
 	state_file = new StateFile(std::move(path_fs), path,
-				   *global_partition, *main_loop);
+				   *instance->partition, *main_loop);
 	g_free(path);
 
 	state_file->Read();
@@ -331,9 +330,10 @@ initialize_decoder_and_player(void)
 		config_get_positive(CONF_MAX_PLAYLIST_LENGTH,
 				    DEFAULT_PLAYLIST_MAX_LENGTH);
 
-	global_partition = new Partition(max_length,
+	instance->partition = new Partition(*instance,
-					 buffered_chunks,
+					    max_length,
-					 buffered_before_play);
+					    buffered_chunks,
+					    buffered_before_play);
 }
 
 /**
@@ -346,7 +346,7 @@ idle_event_emitted(void)
 	   clients */
 	unsigned flags = idle_get();
 	if (flags != 0)
-		client_list->IdleAdd(flags);
+		instance->client_list->IdleAdd(flags);
 
 	if (flags & (IDLE_PLAYLIST|IDLE_PLAYER|IDLE_MIXER|IDLE_OUTPUT))
 		state_file->CheckModified();
@@ -421,8 +421,10 @@ int mpd_main(int argc, char *argv[])
 	main_task = g_thread_self();
 	main_loop = new EventLoop(EventLoop::Default());
 
+	instance = new Instance();
+
 	const unsigned max_clients = config_get_positive(CONF_MAX_CONN, 10);
-	client_list = new ClientList(max_clients);
+	instance->client_list = new ClientList(max_clients);
 
 	success = listen_global_init(&error);
 	if (!success) {
@@ -469,7 +471,7 @@ int mpd_main(int argc, char *argv[])
 	initialize_decoder_and_player();
 	volume_init();
 	initAudioConfig();
-	audio_output_all_init(&global_partition->pc);
+	audio_output_all_init(&instance->partition->pc);
 	client_manager_init();
 	replay_gain_global_init();
 
@@ -495,7 +497,7 @@ int mpd_main(int argc, char *argv[])
 
 	ZeroconfInit(*main_loop);
 
-	player_create(&global_partition->pc);
+	player_create(&instance->partition->pc);
 
 	if (create_db) {
 		/* the database failed to load: recreate the
@@ -511,7 +513,7 @@ int mpd_main(int argc, char *argv[])
 		return EXIT_FAILURE;
 	}
 
-	audio_output_all_set_replay_gain_mode(replay_gain_get_real_mode(global_partition->playlist.queue.random));
+	audio_output_all_set_replay_gain_mode(replay_gain_get_real_mode(instance->partition->playlist.queue.random));
 
 	success = config_get_bool(CONF_AUTO_UPDATE, false);
 #ifdef ENABLE_INOTIFY
@@ -527,7 +529,7 @@ int mpd_main(int argc, char *argv[])
 
 	/* enable all audio outputs (if not already done by
 	   playlist_state_restore() */
-	global_partition->pc.UpdateAudio();
+	instance->partition->pc.UpdateAudio();
 
 #ifdef WIN32
 	win32_app_started();
@@ -551,10 +553,10 @@ int mpd_main(int argc, char *argv[])
 		delete state_file;
 	}
 
-	global_partition->pc.Kill();
+	instance->partition->pc.Kill();
 	ZeroconfDeinit();
 	listen_global_finish();
-	delete client_list;
+	delete instance->client_list;
 
 	start = clock();
 	DatabaseGlobalDeinit();
@@ -572,7 +574,7 @@ int mpd_main(int argc, char *argv[])
 	audio_output_all_finish();
 	volume_finish();
 	mapper_finish();
-	delete global_partition;
+	delete instance->partition;
 	command_finish();
 	update_global_finish();
 	decoder_plugin_deinit_all();
@@ -582,6 +584,7 @@ int mpd_main(int argc, char *argv[])
 	config_global_finish();
 	stats_global_finish();
 	io_thread_deinit();
+	delete instance;
 	delete main_loop;
 	daemonize_finish();
 #ifdef WIN32

src/Main.hxx

@@ -23,14 +23,13 @@
 #include <glib.h>
 
 class EventLoop;
+struct Instance;
 
 extern GThread *main_task;
 
 extern EventLoop *main_loop;
 
-extern class ClientList *client_list;
+extern Instance *instance;
-
-extern struct Partition *global_partition;
 
 /**
  * A entry point for application.

src/MessageCommands.cxx

@@ -22,6 +22,7 @@
 #include "ClientSubscribe.hxx"
 #include "ClientInternal.hxx"
 #include "ClientList.hxx"
+#include "Instance.hxx"
 #include "Main.hxx"
 #include "protocol/Result.hxx"
 #include "protocol/ArgParser.hxx"
@@ -81,7 +82,7 @@ handle_channels(Client *client,
 	assert(argc == 1);
 
 	std::set<std::string> channels;
-	for (const auto &c : *client_list)
+	for (const auto &c : *instance->client_list)
 		channels.insert(c->subscriptions.begin(),
 				c->subscriptions.end());
 
@@ -122,7 +123,7 @@ handle_send_message(Client *client,
 
 	bool sent = false;
 	const ClientMessage msg(argv[1], argv[2]);
-	for (const auto &c : *client_list)
+	for (const auto &c : *instance->client_list)
 		if (client_push_message(c, msg))
 			sent = true;
 

src/Partition.hxx

@@ -23,19 +23,24 @@
 #include "Playlist.hxx"
 #include "PlayerControl.hxx"
 
+struct Instance;
+
 /**
  * A partition of the Music Player Daemon.  It is a separate unit with
  * a playlist, a player, outputs etc.
  */
 struct Partition {
+	Instance &instance;
+
 	struct playlist playlist;
 
 	player_control pc;
 
-	Partition(unsigned max_length,
+	Partition(Instance &_instance,
+		  unsigned max_length,
 		  unsigned buffer_chunks,
 		  unsigned buffered_before_play)
-		:playlist(max_length),
+		:instance(_instance), playlist(max_length),
 		 pc(buffer_chunks, buffered_before_play) {
 	}
 

src/PlaylistGlobal.cxx

@@ -26,19 +26,19 @@
 #include "PlaylistGlobal.hxx"
 #include "Playlist.hxx"
 #include "Main.hxx"
-#include "Partition.hxx"
+#include "Instance.hxx"
 #include "GlobalEvents.hxx"
 
 static void
 playlist_tag_event(void)
 {
-	global_partition->playlist.TagChanged();
+	instance->TagModified();
 }
 
 static void
 playlist_event(void)
 {
-	global_partition->playlist.SyncWithPlayer(global_partition->pc);
+	instance->SyncWithPlayer();
 }
 
 void

src/UpdateGlue.cxx

@@ -32,7 +32,7 @@ extern "C" {
 }
 
 #include "Main.hxx"
-#include "Partition.hxx"
+#include "Instance.hxx"
 #include "mpd_error.h"
 
 #include <glib.h>
@@ -156,11 +156,9 @@ static void update_finished_event(void)
 
 	idle_add(IDLE_UPDATE);
 
-	if (modified) {
+	if (modified)
 		/* send "idle" events */
-		global_partition->playlist.FullIncrementVersions();
+		instance->DatabaseModified();
-		idle_add(IDLE_DATABASE);
-	}
 
 	path = update_queue_shift(&discard);
 	if (path != NULL) {

src/UpdateRemove.cxx

@@ -20,13 +20,13 @@
 #include "config.h" /* must be first for large file support */
 #include "UpdateRemove.hxx"
 #include "Playlist.hxx"
-#include "Partition.hxx"
 #include "GlobalEvents.hxx"
 #include "thread/Mutex.hxx"
 #include "thread/Cond.hxx"
 
 #include "song.h"
 #include "Main.hxx"
+#include "Instance.hxx"
 
 #ifdef ENABLE_SQLITE
 #include "StickerDatabase.hxx"
@@ -63,7 +63,7 @@ song_remove_event(void)
 		sticker_song_delete(removed_song);
 #endif
 
-	global_partition->DeleteSong(*removed_song);
+	instance->DeleteSong(*removed_song);
 
 	/* clear "removed_song" and send signal to update thread */
 	remove_mutex.lock();