1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/*
* Copyright (C) 2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/Threading.h>
namespace WTF {
template <typename IntegralType>
class SingleThreadIntegralWrapper {
public:
SingleThreadIntegralWrapper(IntegralType);
operator IntegralType() const;
explicit operator bool() const;
SingleThreadIntegralWrapper& operator=(IntegralType);
SingleThreadIntegralWrapper& operator++();
SingleThreadIntegralWrapper& operator--();
IntegralType valueWithoutThreadCheck() const
{
// This is called after the destructor in WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR,
// the compiler can see it as uninitialized.
IGNORE_GCC_WARNINGS_BEGIN("uninitialized")
return m_value;
IGNORE_GCC_WARNINGS_END
}
private:
#if ASSERT_ENABLED && !USE(WEB_THREAD)
void assertThread() const { ASSERT(m_thread.ptr() == &Thread::current()); }
#else
constexpr void assertThread() const { }
#endif
IntegralType m_value;
#if ASSERT_ENABLED && !USE(WEB_THREAD)
Ref<Thread> m_thread;
#endif
};
template <typename IntegralType>
inline SingleThreadIntegralWrapper<IntegralType>::SingleThreadIntegralWrapper(IntegralType value)
: m_value { value }
#if ASSERT_ENABLED && !USE(WEB_THREAD)
, m_thread { Thread::current() }
#endif
{ }
template <typename IntegralType>
inline SingleThreadIntegralWrapper<IntegralType>::operator IntegralType() const
{
assertThread();
return m_value;
}
template <typename IntegralType>
inline SingleThreadIntegralWrapper<IntegralType>::operator bool() const
{
assertThread();
return m_value;
}
template <typename IntegralType>
inline SingleThreadIntegralWrapper<IntegralType>& SingleThreadIntegralWrapper<IntegralType>::operator=(IntegralType value)
{
assertThread();
m_value = value;
return *this;
}
template <typename IntegralType>
inline SingleThreadIntegralWrapper<IntegralType>& SingleThreadIntegralWrapper<IntegralType>::operator++()
{
assertThread();
m_value++;
return *this;
}
template <typename IntegralType>
inline SingleThreadIntegralWrapper<IntegralType>& SingleThreadIntegralWrapper<IntegralType>::operator--()
{
assertThread();
m_value--;
return *this;
}
} // namespace WTF
using WTF::SingleThreadIntegralWrapper;
|
