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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <Kernel/FileSystem/File.h>
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#include <Kernel/Memory/AnonymousVMObject.h>
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namespace Kernel {
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class AnonymousFile final : public File {
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public:
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static ErrorOr<NonnullRefPtr<AnonymousFile>> try_create(NonnullRefPtr<Memory::AnonymousVMObject> vmobject)
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{
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return adopt_nonnull_ref_or_enomem(new (nothrow) AnonymousFile(move(vmobject)));
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}
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virtual ~AnonymousFile() override;
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virtual ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
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private:
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virtual StringView class_name() const override { return "AnonymousFile"sv; }
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virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_path(const OpenFileDescription&) const;
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virtual bool can_read(const OpenFileDescription&, size_t) const override { return false; }
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virtual bool can_write(const OpenFileDescription&, size_t) const override { return false; }
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return ENOTSUP; }
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return ENOTSUP; }
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explicit AnonymousFile(NonnullRefPtr<Memory::AnonymousVMObject>);
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NonnullRefPtr<Memory::AnonymousVMObject> m_vmobject;
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};
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}
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