mirror of
https://github.com/SerenityOS/serenity
synced 2026-05-09 16:42:10 +02:00
3edc6ae0d6
Do this by: - Removing more instances of `LockRefPtr` and `NonnullLockRefPtr`. - Using better names of construction methods (i.e. `create` instead of `try_create`). - Only returning `NonnullRefPtr` on the `Device::try_create_device` method. - Removing a version of the `Device::try_create_device` method that called `DeviceType::try_create(forward<Args>(args)...)`, which was only used in a construction point in a VirtIO driver which now doesn't need this anymore.
66 lines
1.6 KiB
C++
66 lines
1.6 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/Platform.h>
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#if ARCH(X86_64)
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# include <Kernel/Arch/x86_64/BochsDebugOutput.h>
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#endif
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#include <Kernel/API/MajorNumberAllocation.h>
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#include <Kernel/Devices/Device.h>
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#include <Kernel/Devices/Generic/ConsoleDevice.h>
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#include <Kernel/Locking/Spinlock.h>
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#include <Kernel/Sections.h>
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#include <Kernel/kstdio.h>
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namespace Kernel {
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Spinlock<LockRank::None> g_console_lock {};
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UNMAP_AFTER_INIT NonnullRefPtr<ConsoleDevice> ConsoleDevice::must_create()
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{
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return MUST(Device::try_create_device<ConsoleDevice>());
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}
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UNMAP_AFTER_INIT ConsoleDevice::ConsoleDevice()
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: CharacterDevice(MajorAllocation::CharacterDeviceFamily::Console, 1)
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{
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}
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UNMAP_AFTER_INIT ConsoleDevice::~ConsoleDevice() = default;
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bool ConsoleDevice::can_read(Kernel::OpenFileDescription const&, u64) const
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{
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return false;
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}
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ErrorOr<size_t> ConsoleDevice::read(OpenFileDescription&, u64, Kernel::UserOrKernelBuffer&, size_t)
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{
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// FIXME: Implement reading from the console.
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// Maybe we could use a ring buffer for this device?
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return 0;
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}
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ErrorOr<size_t> ConsoleDevice::write(OpenFileDescription&, u64, Kernel::UserOrKernelBuffer const& data, size_t size)
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{
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if (!size)
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return 0;
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return data.read_buffered<256>(size, [&](ReadonlyBytes readonly_bytes) {
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for (auto const& byte : readonly_bytes)
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put_char(byte);
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return readonly_bytes.size();
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});
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}
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void ConsoleDevice::put_char(char ch)
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{
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Kernel::SpinlockLocker lock(g_console_lock);
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dbgputchar(ch);
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m_logbuffer.enqueue(ch);
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}
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}
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