1 files changed, 97 insertions, 0 deletions
diff --git a/src/db/update/UpdateRemove.cxx b/src/db/update/UpdateRemove.cxx
new file mode 100644
index 000000000..c57758aef
--- /dev/null
+++ b/src/db/update/UpdateRemove.cxx
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2003-2014 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" /* must be first for large file support */
+#include "UpdateRemove.hxx"
+#include "UpdateDomain.hxx"
+#include "GlobalEvents.hxx"
+#include "thread/Mutex.hxx"
+#include "thread/Cond.hxx"
+#include "db/Song.hxx"
+#include "db/LightSong.hxx"
+#include "Main.hxx"
+#include "Instance.hxx"
+#include "Log.hxx"
+
+#ifdef ENABLE_SQLITE
+#include "sticker/StickerDatabase.hxx"
+#include "sticker/SongSticker.hxx"
+#endif
+
+#include <assert.h>
+
+static const Song *removed_song;
+
+static Mutex remove_mutex;
+static Cond remove_cond;
+
+/**
+ * Safely remove a song from the database.  This must be done in the
+ * main task, to be sure that there is no pointer left to it.
+ */
+static void
+song_remove_event(void)
+{
+	assert(removed_song != nullptr);
+
+	{
+		const auto uri = removed_song->GetURI();
+		FormatDefault(update_domain, "removing %s", uri.c_str());
+	}
+
+#ifdef ENABLE_SQLITE
+	/* if the song has a sticker, remove it */
+	if (sticker_enabled())
+		sticker_song_delete(removed_song->Export());
+#endif
+
+	{
+		const auto uri = removed_song->GetURI();
+		instance->DeleteSong(uri.c_str());
+	}
+
+	/* clear "removed_song" and send signal to update thread */
+	remove_mutex.lock();
+	removed_song = nullptr;
+	remove_cond.signal();
+	remove_mutex.unlock();
+}
+
+void
+update_remove_global_init(void)
+{
+	GlobalEvents::Register(GlobalEvents::DELETE, song_remove_event);
+}
+
+void
+update_remove_song(const Song *song)
+{
+	assert(removed_song == nullptr);
+
+	removed_song = song;
+
+	GlobalEvents::Emit(GlobalEvents::DELETE);
+
+	remove_mutex.lock();
+
+	while (removed_song != nullptr)
+		remove_cond.wait(remove_mutex);
+
+	remove_mutex.unlock();
+}