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/*
* Copyright (c) 2021-2022, 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 ErrorOr<NonnullLockRefPtr<AnonymousFile>> try_create(NonnullLockRefPtr<Memory::AnonymousVMObject> vmobject)
{
return adopt_nonnull_lock_ref_or_enomem(new (nothrow) AnonymousFile(move(vmobject)));
}
virtual ~AnonymousFile() override;
virtual ErrorOr<NonnullLockRefPtr<Memory::VMObject>> vmobject_for_mmap(Process&, Memory::VirtualRange const&, u64& offset, bool shared) override;
private:
virtual StringView class_name() const override { return "AnonymousFile"sv; }
virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_path(OpenFileDescription const&) const override;
virtual bool can_read(OpenFileDescription const&, u64) const override { return false; }
virtual bool can_write(OpenFileDescription const&, u64) const override { return false; }
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return ENOTSUP; }
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override { return ENOTSUP; }
explicit AnonymousFile(NonnullLockRefPtr<Memory::AnonymousVMObject>);
NonnullLockRefPtr<Memory::AnonymousVMObject> m_vmobject;
};
}
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