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https://github.com/RGBCube/serenity
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2ff3c54153
The maximum number of virtual consoles is determined at compile time, so we can pre-allocate that many slots, dodging some heap allocations. Furthermore, virtual consoles are never destroyed, so it's fine to simply store a raw pointer to the currently active one.
47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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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/NonnullRefPtr.h>
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#include <AK/NonnullRefPtrVector.h>
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#include <AK/Types.h>
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#include <Kernel/TTY/VirtualConsole.h>
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namespace Kernel {
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class ConsoleManagement {
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AK_MAKE_ETERNAL;
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friend class VirtualConsole;
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public:
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ConsoleManagement();
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static constexpr size_t s_max_virtual_consoles = 6;
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static bool is_initialized();
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static ConsoleManagement& the();
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void switch_to(unsigned);
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void initialize();
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void resolution_was_changed();
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void switch_to_debug() { switch_to(1); }
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NonnullRefPtr<VirtualConsole> first_tty() const { return m_consoles[0]; }
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NonnullRefPtr<VirtualConsole> debug_tty() const { return m_consoles[1]; }
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RecursiveSpinLock& tty_write_lock() { return m_tty_write_lock; }
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private:
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NonnullRefPtrVector<VirtualConsole, s_max_virtual_consoles> m_consoles;
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VirtualConsole* m_active_console { nullptr };
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SpinLock<u8> m_lock;
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RecursiveSpinLock m_tty_write_lock;
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};
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};
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