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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, Patrick Meyer <git@the-space.agency>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <Kernel/Devices/BlockDevice.h>
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#include <Kernel/Devices/KCOVInstance.h>
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namespace Kernel {
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class KCOVDevice final : public BlockDevice {
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AK_MAKE_ETERNAL
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friend class DeviceManagement;
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public:
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static HashMap<ProcessID, KCOVInstance*>* proc_instance;
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static HashMap<ThreadID, KCOVInstance*>* thread_instance;
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static NonnullRefPtr<KCOVDevice> must_create();
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static void free_thread();
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static void free_process();
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// ^File
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ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
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ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
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protected:
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KCOVDevice();
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virtual StringView class_name() const override { return "KCOVDevice"sv; }
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virtual bool can_read(const OpenFileDescription&, size_t) const override final { return true; }
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virtual bool can_write(const OpenFileDescription&, size_t) const override final { return true; }
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virtual void start_request(AsyncBlockDeviceRequest& request) override final { request.complete(AsyncDeviceRequest::Failure); }
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
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virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
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};
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}
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