mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-23 08:00:20 +00:00
1682f0b760
SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
49 lines
882 B
C++
49 lines
882 B
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "NullDevice.h"
|
|
#include <AK/Singleton.h>
|
|
#include <AK/StdLibExtras.h>
|
|
|
|
namespace Kernel {
|
|
|
|
static AK::Singleton<NullDevice> s_the;
|
|
|
|
UNMAP_AFTER_INIT void NullDevice::initialize()
|
|
{
|
|
s_the.ensure_instance();
|
|
}
|
|
|
|
NullDevice& NullDevice::the()
|
|
{
|
|
return *s_the;
|
|
}
|
|
|
|
UNMAP_AFTER_INIT NullDevice::NullDevice()
|
|
: CharacterDevice(1, 3)
|
|
{
|
|
}
|
|
|
|
UNMAP_AFTER_INIT NullDevice::~NullDevice()
|
|
{
|
|
}
|
|
|
|
bool NullDevice::can_read(const FileDescription&, size_t) const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
KResultOr<size_t> NullDevice::read(FileDescription&, u64, UserOrKernelBuffer&, size_t)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
KResultOr<size_t> NullDevice::write(FileDescription&, u64, const UserOrKernelBuffer&, size_t buffer_size)
|
|
{
|
|
return min(static_cast<size_t>(PAGE_SIZE), buffer_size);
|
|
}
|
|
|
|
}
|