deps: update V8 to 7.6.303.28

PR-URL: https://github.com/nodejs/node/pull/28016
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/deps/v8/src/execution/thread-id.h b/deps/v8/src/execution/thread-id.h
new file mode 100644
index 0000000000..27f05843f3
--- /dev/null
+++ b/deps/v8/src/execution/thread-id.h
@@ -0,0 +1,54 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_EXECUTION_THREAD_ID_H_
+#define V8_EXECUTION_THREAD_ID_H_
+
+#include "src/base/macros.h"
+
+namespace v8 {
+namespace internal {
+
+// Platform-independent, reliable thread identifier.
+class ThreadId {
+ public:
+  // Creates an invalid ThreadId.
+  constexpr ThreadId() noexcept : ThreadId(kInvalidId) {}
+
+  bool operator==(const ThreadId& other) const { return id_ == other.id_; }
+  bool operator!=(const ThreadId& other) const { return id_ != other.id_; }
+
+  // Checks whether this ThreadId refers to any thread.
+  bool IsValid() const { return id_ != kInvalidId; }
+
+  // Converts ThreadId to an integer representation.
+  constexpr int ToInteger() const { return id_; }
+
+  // Returns ThreadId for current thread if it exists or invalid id.
+  static ThreadId TryGetCurrent();
+
+  // Returns ThreadId for current thread.
+  static ThreadId Current() { return ThreadId(GetCurrentThreadId()); }
+
+  // Returns invalid ThreadId (guaranteed not to be equal to any thread).
+  static constexpr ThreadId Invalid() { return ThreadId(kInvalidId); }
+
+  // Converts ThreadId to an integer representation
+  // (required for public API: V8::V8::TerminateExecution).
+  static constexpr ThreadId FromInteger(int id) { return ThreadId(id); }
+
+ private:
+  static constexpr int kInvalidId = -1;
+
+  explicit constexpr ThreadId(int id) noexcept : id_(id) {}
+
+  V8_EXPORT_PRIVATE static int GetCurrentThreadId();
+
+  int id_;
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_EXECUTION_THREAD_ID_H_