| // 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. |
| |
| #include "src/execution/thread-id.h" |
| #include "src/base/lazy-instance.h" |
| #include "src/base/platform/platform.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| namespace { |
| |
| thread_local int thread_id = 0; |
| |
| std::atomic<int> next_thread_id{1}; |
| |
| } // namespace |
| |
| // static |
| ThreadId ThreadId::TryGetCurrent() { |
| return thread_id == 0 ? Invalid() : ThreadId(thread_id); |
| } |
| |
| // static |
| int ThreadId::GetCurrentThreadId() { |
| if (thread_id == 0) { |
| thread_id = next_thread_id.fetch_add(1); |
| CHECK_LE(1, thread_id); |
| } |
| return thread_id; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |