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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
// Copyright 2012-2022 The ANTLR Project
//
// 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.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be used to
// endorse or promote products derived from this software without specific prior written
// permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT HOLDER OR
// 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 "antlr4-common.h"
#include <mutex>
#include <shared_mutex>
#include <utility>
#if ANTLR4CPP_USING_ABSEIL
#error #include "absl/base/call_once.h"
#error #include "absl/base/thread_annotations.h"
#error #include "absl/synchronization/mutex.h"
#define ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS ABSL_NO_THREAD_SAFETY_ANALYSIS
#else
#define ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS
#endif
// By default ANTLRv4 uses synchronization primitives provided by the C++ standard library. In most
// deployments this is fine, however in some using custom synchronization primitives may be
// preferred. This header allows that by optionally supporting some alternative implementations and
// allowing for more easier patching of other alternatives.
namespace antlr4::internal {
// Must be compatible with C++ standard library Mutex requirement.
class ANTLR4CPP_PUBLIC Mutex final {
public:
Mutex() = default;
// No copying or moving, we are as strict as possible to support other implementations.
Mutex(const Mutex&) = delete;
Mutex(Mutex&&) = delete;
// No copying or moving, we are as strict as possible to support other implementations.
Mutex& operator=(const Mutex&) = delete;
Mutex& operator=(Mutex&&) = delete;
void lock() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
bool try_lock() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
void unlock() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
private:
#if ANTLR4CPP_USING_ABSEIL
absl::Mutex _impl;
#else
std::mutex _impl;
#endif
};
template <typename Mutex>
using UniqueLock = std::unique_lock<Mutex>;
// Must be compatible with C++ standard library SharedMutex requirement.
class ANTLR4CPP_PUBLIC SharedMutex final {
public:
SharedMutex() = default;
// No copying or moving, we are as strict as possible to support other implementations.
SharedMutex(const SharedMutex&) = delete;
SharedMutex(SharedMutex&&) = delete;
// No copying or moving, we are as strict as possible to support other implementations.
SharedMutex& operator=(const SharedMutex&) = delete;
SharedMutex& operator=(SharedMutex&&) = delete;
void lock() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
bool try_lock() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
void unlock() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
void lock_shared() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
bool try_lock_shared() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
void unlock_shared() ANTLR4CPP_NO_THREAD_SAFTEY_ANALYSIS;
private:
#if ANTLR4CPP_USING_ABSEIL
absl::Mutex _impl;
#else
std::shared_mutex _impl;
#endif
};
template <typename Mutex>
using SharedLock = std::shared_lock<Mutex>;
class OnceFlag;
template <typename Callable, typename... Args>
void call_once(OnceFlag &onceFlag, Callable &&callable, Args&&... args);
// Must be compatible with std::once_flag.
class ANTLR4CPP_PUBLIC OnceFlag final {
public:
constexpr OnceFlag() = default;
// No copying or moving, we are as strict as possible to support other implementations.
OnceFlag(const OnceFlag&) = delete;
OnceFlag(OnceFlag&&) = delete;
// No copying or moving, we are as strict as possible to support other implementations.
OnceFlag& operator=(const OnceFlag&) = delete;
OnceFlag& operator=(OnceFlag&&) = delete;
private:
template <typename Callable, typename... Args>
friend void call_once(OnceFlag &onceFlag, Callable &&callable, Args&&... args);
#if ANTLR4CPP_USING_ABSEIL
absl::once_flag _impl;
#else
std::once_flag _impl;
#endif
};
template <typename Callable, typename... Args>
void call_once(OnceFlag &onceFlag, Callable &&callable, Args&&... args) {
#if ANTLR4CPP_USING_ABSEIL
absl::call_once(onceFlag._impl, std::forward<Callable>(callable), std::forward<Args>(args)...);
#else
std::call_once(onceFlag._impl, std::forward<Callable>(callable), std::forward<Args>(args)...);
#endif
}
} // namespace antlr4::internal
|
