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Serenity Operating System
1/*
2 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <Kernel/ScopedCritical.h>
8
9#include <Kernel/Arch/Processor.h>
10
11namespace Kernel {
12
13ScopedCritical::ScopedCritical()
14{
15 enter();
16}
17
18ScopedCritical::~ScopedCritical()
19{
20 if (m_valid)
21 leave();
22}
23
24ScopedCritical::ScopedCritical(ScopedCritical&& from)
25 : m_valid(exchange(from.m_valid, false))
26{
27}
28
29ScopedCritical& ScopedCritical::operator=(ScopedCritical&& from)
30{
31 if (&from != this) {
32 m_valid = exchange(from.m_valid, false);
33 }
34 return *this;
35}
36
37void ScopedCritical::leave()
38{
39 VERIFY(m_valid);
40 m_valid = false;
41 Processor::leave_critical();
42}
43
44void ScopedCritical::enter()
45{
46 VERIFY(!m_valid);
47 m_valid = true;
48 Processor::enter_critical();
49}
50
51}