ramfile.h

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/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2022 MBition GmbH
    SPDX-FileContributor: Kai Uwe Broulik <kai_uwe.broulik@mbition.io>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include <config-kwin.h>
#include <kwin_export.h>
 
#if HAVE_MEMFD
#include "filedescriptor.h"
#else
#include <QTemporaryFile>
#include <memory>
#endif
 
#include <QFlag>
 
class QByteArray;
 
namespace KWin
{
 
class KWIN_EXPORT RamFile
{
public:
    enum class Flag {
        SealWrite = 1 << 0, 
    };
    Q_DECLARE_FLAGS(Flags, Flag)
 
    RamFile() = default;
    RamFile(const char *name, const void *inData, int size, Flags flags = {});
 
    RamFile(RamFile &&other) Q_DECL_NOEXCEPT;
    RamFile &operator=(RamFile &&other) Q_DECL_NOEXCEPT;
 
    ~RamFile();
 
    bool isValid() const;
    Flags effectiveFlags() const;
 
    int fd() const;
    int size() const;
 
private:
    void cleanup();
 
    int m_size = 0;
    Flags m_flags = {};
 
#if HAVE_MEMFD
    KWin::FileDescriptor m_fd;
#else
    std::unique_ptr<QTemporaryFile> m_tmp;
#endif
};
 
} // namespace KWin