1 | // Copyright 2018 the V8 project authors. All rights reserved. |
2 | // Use of this source code is governed by a BSD-style license that can be |
3 | // found in the LICENSE file. |
4 | |
5 | #ifndef V8_THREAD_ID_H_ |
6 | #define V8_THREAD_ID_H_ |
7 | |
8 | #include "src/base/macros.h" |
9 | |
10 | namespace v8 { |
11 | namespace internal { |
12 | |
13 | // Platform-independent, reliable thread identifier. |
14 | class ThreadId { |
15 | public: |
16 | // Creates an invalid ThreadId. |
17 | constexpr ThreadId() noexcept : ThreadId(kInvalidId) {} |
18 | |
19 | bool operator==(const ThreadId& other) const { return id_ == other.id_; } |
20 | bool operator!=(const ThreadId& other) const { return id_ != other.id_; } |
21 | |
22 | // Checks whether this ThreadId refers to any thread. |
23 | bool IsValid() const { return id_ != kInvalidId; } |
24 | |
25 | // Converts ThreadId to an integer representation. |
26 | constexpr int ToInteger() const { return id_; } |
27 | |
28 | // Returns ThreadId for current thread if it exists or invalid id. |
29 | static ThreadId TryGetCurrent(); |
30 | |
31 | // Returns ThreadId for current thread. |
32 | static ThreadId Current() { return ThreadId(GetCurrentThreadId()); } |
33 | |
34 | // Returns invalid ThreadId (guaranteed not to be equal to any thread). |
35 | static constexpr ThreadId Invalid() { return ThreadId(kInvalidId); } |
36 | |
37 | // Converts ThreadId to an integer representation |
38 | // (required for public API: V8::V8::TerminateExecution). |
39 | static constexpr ThreadId FromInteger(int id) { return ThreadId(id); } |
40 | |
41 | private: |
42 | static constexpr int kInvalidId = -1; |
43 | |
44 | explicit constexpr ThreadId(int id) noexcept : id_(id) {} |
45 | |
46 | V8_EXPORT_PRIVATE static int GetCurrentThreadId(); |
47 | |
48 | int id_; |
49 | }; |
50 | |
51 | } // namespace internal |
52 | } // namespace v8 |
53 | |
54 | #endif // V8_THREAD_ID_H_ |
55 | |