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+/*
+ * 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.
+ */
+
+#ifndef MPD_UPDATE_QUEUE_HXX
+#define MPD_UPDATE_QUEUE_HXX
+
+#include "check.h"
+#include "Compiler.h"
+
+#include <string>
+#include <list>
+
+class SimpleDatabase;
+class Storage;
+
+struct UpdateQueueItem {
+ SimpleDatabase *db;
+ Storage *storage;
+
+ std::string path_utf8;
+ unsigned id;
+ bool discard;
+
+ UpdateQueueItem():id(0) {}
+
+ UpdateQueueItem(SimpleDatabase &_db,
+ Storage &_storage,
+ const char *_path, bool _discard,
+ unsigned _id)
+ :db(&_db), storage(&_storage), path_utf8(_path),
+ id(_id), discard(_discard) {}
+
+ bool IsDefined() const {
+ return id != 0;
+ }
+};
+
+class UpdateQueue {
+ static constexpr unsigned MAX_UPDATE_QUEUE_SIZE = 32;
+
+ std::list<UpdateQueueItem> update_queue;
+
+public:
+ gcc_nonnull_all
+ bool Push(SimpleDatabase &db, Storage &storage,
+ const char *path, bool discard, unsigned id);
+
+ UpdateQueueItem Pop();
+
+ void Clear() {
+ update_queue.clear();
+ }
+
+ gcc_nonnull_all
+ void Erase(SimpleDatabase &db);
+
+ gcc_nonnull_all
+ void Erase(Storage &storage);
+};
+
+#endif