mirror of
https://github.com/RGBCube/serenity
synced 2025-05-14 08:24:58 +00:00
11eee67b85
Until now, our kernel has reimplemented a number of AK classes to provide automatic internal locking: - RefPtr - NonnullRefPtr - WeakPtr - Weakable This patch renames the Kernel classes so that they can coexist with the original AK classes: - RefPtr => LockRefPtr - NonnullRefPtr => NonnullLockRefPtr - WeakPtr => LockWeakPtr - Weakable => LockWeakable The goal here is to eventually get rid of the Lock* classes in favor of using external locking.
37 lines
1.2 KiB
C++
37 lines
1.2 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/PhysicalAddress.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class MemoryDevice final : public CharacterDevice {
|
|
friend class DeviceManagement;
|
|
|
|
public:
|
|
static NonnullLockRefPtr<MemoryDevice> must_create();
|
|
~MemoryDevice();
|
|
|
|
virtual ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, 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; }
|
|
|
|
bool is_allowed_range(PhysicalAddress, Memory::VirtualRange const&) const;
|
|
};
|
|
|
|
}
|