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Serenity Operating System
1/*
2 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/Error.h>
10#include <AK/Noncopyable.h>
11#include <AK/NonnullRefPtr.h>
12#include <AK/RefCounted.h>
13#include <LibCore/Forward.h>
14
15namespace Core {
16
17class MappedFile : public RefCounted<MappedFile> {
18 AK_MAKE_NONCOPYABLE(MappedFile);
19 AK_MAKE_NONMOVABLE(MappedFile);
20
21public:
22 static ErrorOr<NonnullRefPtr<MappedFile>> map(StringView path);
23 static ErrorOr<NonnullRefPtr<MappedFile>> map_from_file(NonnullOwnPtr<Core::File>, StringView path);
24 static ErrorOr<NonnullRefPtr<MappedFile>> map_from_fd_and_close(int fd, StringView path);
25 ~MappedFile();
26
27 void* data() { return m_data; }
28 void const* data() const { return m_data; }
29
30 size_t size() const { return m_size; }
31
32 ReadonlyBytes bytes() const { return { m_data, m_size }; }
33
34private:
35 explicit MappedFile(void*, size_t);
36
37 void* m_data { nullptr };
38 size_t m_size { 0 };
39};
40
41}