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Kernel: Pull apart CPU.h
This does not add any functional changes
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86 changed files with 3866 additions and 3493 deletions
64
Kernel/Arch/x86/ScopedCritical.h
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64
Kernel/Arch/x86/ScopedCritical.h
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/*
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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/Types.h>
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#include <Kernel/Arch/x86/Processor.h>
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namespace Kernel {
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class ScopedCritical {
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AK_MAKE_NONCOPYABLE(ScopedCritical);
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public:
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ScopedCritical()
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{
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enter();
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}
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~ScopedCritical()
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{
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if (m_valid)
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leave();
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}
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ScopedCritical(ScopedCritical&& from)
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: m_prev_flags(exchange(from.m_prev_flags, 0))
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, m_valid(exchange(from.m_valid, false))
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{
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}
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ScopedCritical& operator=(ScopedCritical&& from)
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{
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if (&from != this) {
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m_prev_flags = exchange(from.m_prev_flags, 0);
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m_valid = exchange(from.m_valid, false);
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}
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return *this;
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}
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void leave()
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{
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VERIFY(m_valid);
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m_valid = false;
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Processor::current().leave_critical(m_prev_flags);
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}
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void enter()
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{
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VERIFY(!m_valid);
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m_valid = true;
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Processor::current().enter_critical(m_prev_flags);
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}
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private:
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u32 m_prev_flags { 0 };
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bool m_valid { false };
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};
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}
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