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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. :^)
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/*
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* Copyright (c) 2018-2021, 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/Locking/Mutex.h>
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namespace Kernel {
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class MasterPTY;
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class PTYMultiplexer final : public CharacterDevice {
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AK_MAKE_ETERNAL
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public:
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PTYMultiplexer();
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virtual ~PTYMultiplexer() override;
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static void initialize();
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static PTYMultiplexer& the();
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// ^CharacterDevice
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virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return 0; }
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return 0; }
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virtual bool can_read(const OpenFileDescription&, size_t) const override { return true; }
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virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
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void notify_master_destroyed(Badge<MasterPTY>, unsigned index);
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private:
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// ^CharacterDevice
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virtual StringView class_name() const override { return "PTYMultiplexer"sv; }
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static constexpr size_t max_pty_pairs = 64;
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MutexProtected<Vector<unsigned, max_pty_pairs>> m_freelist;
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};
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}
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