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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <Kernel/VM/VMObject.h>
30#include <LibBareMetal/Memory/PhysicalAddress.h>
31
32namespace Kernel {
33
34class AnonymousVMObject : public VMObject {
35public:
36 virtual ~AnonymousVMObject() override;
37
38 static NonnullRefPtr<AnonymousVMObject> create_with_size(size_t);
39 static RefPtr<AnonymousVMObject> create_for_physical_range(PhysicalAddress, size_t);
40 static NonnullRefPtr<AnonymousVMObject> create_with_physical_page(PhysicalPage&);
41 virtual NonnullRefPtr<VMObject> clone() override;
42
43protected:
44 explicit AnonymousVMObject(size_t);
45 explicit AnonymousVMObject(const AnonymousVMObject&);
46
47 virtual const char* class_name() const override { return "AnonymousVMObject"; }
48
49private:
50 AnonymousVMObject(PhysicalAddress, size_t);
51
52 AnonymousVMObject& operator=(const AnonymousVMObject&) = delete;
53 AnonymousVMObject& operator=(AnonymousVMObject&&) = delete;
54 AnonymousVMObject(AnonymousVMObject&&) = delete;
55
56 virtual bool is_anonymous() const override { return true; }
57};
58
59}