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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. :^)
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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 <AK/Badge.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/DoubleBuffer.h>
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namespace Kernel {
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class SlavePTY;
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class MasterPTY final : public CharacterDevice {
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public:
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static ErrorOr<NonnullRefPtr<MasterPTY>> try_create(unsigned index);
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virtual ~MasterPTY() override;
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unsigned index() const { return m_index; }
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KString const& pts_name() const;
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ErrorOr<size_t> on_slave_write(const UserOrKernelBuffer&, size_t);
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bool can_write_from_slave() const;
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void notify_slave_closed(Badge<SlavePTY>);
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bool is_closed() const { return m_closed; }
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virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_path(const OpenFileDescription&) const override;
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private:
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explicit MasterPTY(unsigned index, NonnullOwnPtr<DoubleBuffer> buffer, NonnullOwnPtr<KString> pts_name);
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// ^CharacterDevice
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
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virtual bool can_read(const OpenFileDescription&, size_t) const override;
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virtual bool can_write(const OpenFileDescription&, size_t) const override;
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virtual ErrorOr<void> close() override;
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virtual bool is_master_pty() const override { return true; }
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virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
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virtual StringView class_name() const override { return "MasterPTY"sv; }
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RefPtr<SlavePTY> m_slave;
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unsigned m_index;
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bool m_closed { false };
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NonnullOwnPtr<DoubleBuffer> m_buffer;
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NonnullOwnPtr<KString> m_pts_name;
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};
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}
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