mirror of
https://github.com/RGBCube/serenity
synced 2025-05-21 16:45:07 +00:00
190cf1507b
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
45 lines
1 KiB
C++
45 lines
1 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Memory.h>
|
|
#include <Kernel/Devices/DeviceManagement.h>
|
|
#include <Kernel/Devices/ZeroDevice.h>
|
|
#include <Kernel/Sections.h>
|
|
|
|
namespace Kernel {
|
|
|
|
UNMAP_AFTER_INIT NonnullRefPtr<ZeroDevice> ZeroDevice::must_create()
|
|
{
|
|
auto zero_device_or_error = DeviceManagement::try_create_device<ZeroDevice>();
|
|
// FIXME: Find a way to propagate errors
|
|
VERIFY(!zero_device_or_error.is_error());
|
|
return zero_device_or_error.release_value();
|
|
}
|
|
|
|
UNMAP_AFTER_INIT ZeroDevice::ZeroDevice()
|
|
: CharacterDevice(1, 5)
|
|
{
|
|
}
|
|
|
|
UNMAP_AFTER_INIT ZeroDevice::~ZeroDevice() = default;
|
|
|
|
bool ZeroDevice::can_read(const OpenFileDescription&, u64) const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
ErrorOr<size_t> ZeroDevice::read(OpenFileDescription&, u64, UserOrKernelBuffer& buffer, size_t size)
|
|
{
|
|
TRY(buffer.memset(0, size));
|
|
return size;
|
|
}
|
|
|
|
ErrorOr<size_t> ZeroDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t size)
|
|
{
|
|
return size;
|
|
}
|
|
|
|
}
|