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/*
* Copyright 2003-2020 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 "util/Compiler.h"
#include <string>
#include <string_view>
#include <list>
class SimpleDatabase;
class Storage;
struct UpdateQueueItem {
SimpleDatabase *db;
Storage *storage;
std::string path_utf8;
unsigned id;
bool discard;
UpdateQueueItem() noexcept:id(0) {}
UpdateQueueItem(SimpleDatabase &_db,
Storage &_storage,
std::string_view _path, bool _discard,
unsigned _id) noexcept
:db(&_db), storage(&_storage), path_utf8(_path),
id(_id), discard(_discard) {}
bool IsDefined() const noexcept {
return id != 0;
}
void Clear() noexcept {
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,
std::string_view path, bool discard, unsigned id) noexcept;
UpdateQueueItem Pop() noexcept;
void Clear() noexcept {
update_queue.clear();
}
gcc_nonnull_all
void Erase(SimpleDatabase &db) noexcept;
gcc_nonnull_all
void Erase(Storage &storage) noexcept;
};
#endif