mirror of
https://github.com/SerenityOS/serenity
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96e1391c23
This change has many improvements: - We don't use `LockRefPtr` to hold instances of many base devices as with the DeviceManagement class. Instead, we have a saner pattern of holding them in a `NonnullRefPtr<T> const`, in a small-text footprint class definition in the `Device.cpp` file. - The awkwardness of using `::the()` each time we need to get references to mostly-static objects (like the Event queue) in runtime is now gone in the migration to using the `Device` class. - Acquiring a device feel more obvious because we use now the Device class for this method. The method name is improved as well.
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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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/Devices/CharacterDevice.h>
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namespace Kernel {
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class AudioController;
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class AudioChannel final
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: public CharacterDevice {
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friend class Device;
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public:
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static ErrorOr<NonnullRefPtr<AudioChannel>> create(AudioController const&, size_t channel_index);
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virtual ~AudioChannel() override = default;
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// ^CharacterDevice
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virtual bool can_read(OpenFileDescription const&, u64) const override;
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override;
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virtual bool can_write(OpenFileDescription const&, u64) const override { return true; }
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virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned, Userspace<void*>) override;
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private:
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AudioChannel(AudioController const&, size_t channel_index);
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// ^CharacterDevice
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virtual StringView class_name() const override { return "AudioChannel"sv; }
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LockWeakPtr<AudioController> m_controller;
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size_t const m_channel_index;
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};
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}
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