85422427b9
Signed-off-by: Trial97 <alexandru.tripon97@gmail.com> (cherry picked from commit 73d33f93b30f658f9671358ac52bf4e03afeaefd)
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
// SPDX-License-Identifier: GPL-3.0-only
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/*
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* Prism Launcher - Minecraft Launcher
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* Copyright (c) 2023-2024 Trial97 <alexandru.tripon97@gmail.com>
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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, version 3.
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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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <QFileInfo>
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#include <QSaveFile>
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#include "Application.h"
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#if defined(LAUNCHER_APPLICATION)
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/* PSaveFile
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* A class that mimics QSaveFile for Windows.
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*
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* When reading resources, we need to avoid accessing temporary files
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* generated by QSaveFile. If we start reading such a file, we may
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* inadvertently keep it open while QSaveFile is trying to remove it,
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* or we might detect the file just before it is removed, leading to
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* race conditions and errors.
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*
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* Unfortunately, QSaveFile doesn't provide a way to retrieve the
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* temporary file name or to set a specific template for the temporary
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* file name it uses. By default, QSaveFile appends a `.XXXXXX` suffix
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* to the original file name, where the `XXXXXX` part is dynamically
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* generated to ensure uniqueness.
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*
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* This class acts like a lock by adding and removing the target file
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* name into/from a global string set, helping to manage access to
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* files during critical operations.
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*
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* Note: Please do not use the `setFileName` function directly, as it
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* is not virtual and cannot be overridden.
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*/
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class PSaveFile : public QSaveFile {
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public:
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PSaveFile(const QString& name) : QSaveFile(name) { addPath(name); }
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PSaveFile(const QString& name, QObject* parent) : QSaveFile(name, parent) { addPath(name); }
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virtual ~PSaveFile()
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{
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if (auto app = APPLICATION_DYN) {
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app->removeQSavePath(m_absoluteFilePath);
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}
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}
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private:
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void addPath(const QString& path)
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{
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m_absoluteFilePath = QFileInfo(path).absoluteFilePath() + "."; // add dot for tmp files only
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if (auto app = APPLICATION_DYN) {
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app->addQSavePath(m_absoluteFilePath);
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}
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}
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QString m_absoluteFilePath;
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};
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#else
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#define PSaveFile QSaveFile
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#endif |