| // 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/thread-id.h" |
| #include "src/base/lazy-instance.h" |
| #include "src/base/platform/platform.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| base::Atomic32 ThreadId::highest_thread_id_ = 0; |
| |
| namespace { |
| |
| struct LocalStorageKeyAllocator { |
| static void Construct(void* storage_ptr_arg) { |
| auto storage_ptr = |
| reinterpret_cast<base::Thread::LocalStorageKey*>(storage_ptr_arg); |
| *storage_ptr = base::Thread::CreateThreadLocalKey(); |
| } |
| }; |
| |
| static base::LazyInstance<base::Thread::LocalStorageKey, |
| LocalStorageKeyAllocator>::type thread_id_key = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| } // namespace |
| |
| // static |
| ThreadId ThreadId::TryGetCurrent() { |
| int thread_id = base::Thread::GetThreadLocalInt(thread_id_key.Get()); |
| return thread_id == 0 ? Invalid() : ThreadId(thread_id); |
| } |
| |
| // static |
| int ThreadId::GetCurrentThreadId() { |
| int thread_id = base::Thread::GetThreadLocalInt(thread_id_key.Get()); |
| if (thread_id == 0) { |
| thread_id = AllocateThreadId(); |
| base::Thread::SetThreadLocalInt(thread_id_key.Get(), thread_id); |
| } |
| return thread_id; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |