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f5de4f24b2
Instead of doing so in the constructor, let's do immediately after the constructor, so we can safely pass a reference of a Device, so the SysFSDeviceComponent constructor can use that object to identify whether it's a block device or a character device. This allows to us to not hold a device in SysFSDeviceComponent with a RefPtr. Also, we also call the before_removing method in both SlavePTY::unref and File::unref, so because Device has that method being overrided, it can ensure the device is removed always cleanly.
67 lines
1.2 KiB
C++
67 lines
1.2 KiB
C++
/*
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* Copyright (c) 2018-2020, 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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#include <AK/StringView.h>
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#include <AK/Userspace.h>
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#include <Kernel/FileSystem/File.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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File::File()
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{
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}
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File::~File()
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{
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}
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bool File::unref() const
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{
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if (deref_base())
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return false;
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const_cast<File&>(*this).before_removing();
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delete this;
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return true;
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}
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KResultOr<NonnullRefPtr<OpenFileDescription>> File::open(int options)
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{
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auto description = OpenFileDescription::try_create(*this);
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if (!description.is_error()) {
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description.value()->set_rw_mode(options);
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description.value()->set_file_flags(options);
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}
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return description;
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}
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KResult File::close()
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{
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return KSuccess;
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}
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KResult File::ioctl(OpenFileDescription&, unsigned, Userspace<void*>)
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{
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return ENOTTY;
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}
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KResultOr<Memory::Region*> File::mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64, int, bool)
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{
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return ENODEV;
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}
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KResult File::attach(OpenFileDescription&)
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{
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m_attach_count++;
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return KSuccess;
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}
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void File::detach(OpenFileDescription&)
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{
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m_attach_count--;
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}
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}
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