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.
36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
/*
|
|
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Types.h>
|
|
#include <Kernel/Devices/CharacterDevice.h>
|
|
#include <Kernel/Memory/PhysicalAddress.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class MemoryDevice final : public CharacterDevice {
|
|
friend class Device;
|
|
|
|
public:
|
|
static NonnullRefPtr<MemoryDevice> must_create();
|
|
~MemoryDevice();
|
|
|
|
virtual ErrorOr<NonnullLockRefPtr<Memory::VMObject>> vmobject_for_mmap(Process&, Memory::VirtualRange const&, u64& offset, bool shared) override;
|
|
|
|
private:
|
|
MemoryDevice();
|
|
|
|
virtual StringView class_name() const override { return "MemoryDevice"sv; }
|
|
virtual bool can_read(OpenFileDescription const&, u64) const override { return true; }
|
|
virtual bool can_write(OpenFileDescription const&, u64) const override { return false; }
|
|
virtual bool is_seekable() const override { return true; }
|
|
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
|
|
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override { return EINVAL; }
|
|
};
|
|
|
|
}
|