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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/FileSystem/File.h>
#include <Kernel/Memory/AnonymousVMObject.h>
namespace Kernel {
class AnonymousFile final : public File {
public:
static KResultOr<NonnullRefPtr<AnonymousFile>> try_create(NonnullRefPtr<Memory::AnonymousVMObject> vmobject)
{
return adopt_nonnull_ref_or_enomem(new (nothrow) AnonymousFile(move(vmobject)));
}
virtual ~AnonymousFile() override;
virtual KResultOr<Memory::Region*> mmap(Process&, FileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
private:
virtual StringView class_name() const override { return "AnonymousFile"; }
virtual String absolute_path(const FileDescription&) const override { return ":anonymous-file:"; }
virtual bool can_read(const FileDescription&, size_t) const override { return false; }
virtual bool can_write(const FileDescription&, size_t) const override { return false; }
virtual KResultOr<size_t> read(FileDescription&, u64, UserOrKernelBuffer&, size_t) override { return ENOTSUP; }
virtual KResultOr<size_t> write(FileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return ENOTSUP; }
explicit AnonymousFile(NonnullRefPtr<Memory::AnonymousVMObject>);
NonnullRefPtr<Memory::AnonymousVMObject> m_vmobject;
};
}
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