82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
/*
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* Copyright 2003-2020 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_UPDATE_QUEUE_HXX
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#define MPD_UPDATE_QUEUE_HXX
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#include "util/Compiler.h"
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#include <string>
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#include <string_view>
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#include <list>
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class SimpleDatabase;
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class Storage;
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struct UpdateQueueItem {
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SimpleDatabase *db;
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Storage *storage;
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std::string path_utf8;
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unsigned id;
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bool discard;
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UpdateQueueItem() noexcept:id(0) {}
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UpdateQueueItem(SimpleDatabase &_db,
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Storage &_storage,
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std::string_view _path, bool _discard,
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unsigned _id) noexcept
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:db(&_db), storage(&_storage), path_utf8(_path),
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id(_id), discard(_discard) {}
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bool IsDefined() const noexcept {
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return id != 0;
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}
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void Clear() noexcept {
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id = 0;
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}
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};
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class UpdateQueue {
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static constexpr unsigned MAX_UPDATE_QUEUE_SIZE = 32;
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std::list<UpdateQueueItem> update_queue;
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public:
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gcc_nonnull_all
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bool Push(SimpleDatabase &db, Storage &storage,
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std::string_view path, bool discard, unsigned id) noexcept;
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UpdateQueueItem Pop() noexcept;
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void Clear() noexcept {
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update_queue.clear();
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}
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gcc_nonnull_all
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void Erase(SimpleDatabase &db) noexcept;
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gcc_nonnull_all
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void Erase(Storage &storage) noexcept;
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};
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#endif
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