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ac7ce12123
This was a premature optimization from the early days of SerenityOS. The eternal heap was a simple bump pointer allocator over a static byte array. My original idea was to avoid heap fragmentation and improve data locality, but both ideas were rooted in cargo culting, not data. We would reserve 4 MiB at boot and only ended up using ~256 KiB, wasting the rest. This patch replaces all kmalloc_eternal() usage by regular kmalloc().
47 lines
1.0 KiB
C++
47 lines
1.0 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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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 m_lock;
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RecursiveSpinlock m_tty_write_lock;
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};
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};
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