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// 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 {
DEFINE_LAZY_LEAKY_OBJECT_GETTER(base::Thread::LocalStorageKey, GetThreadIdKey,
base::Thread::CreateThreadLocalKey())
std::atomic<int> next_thread_id{1};
} // namespace
// static
ThreadId ThreadId::TryGetCurrent() {
int thread_id = base::Thread::GetThreadLocalInt(*GetThreadIdKey());
return thread_id == 0 ? Invalid() : ThreadId(thread_id);
}
// static
int ThreadId::GetCurrentThreadId() {
auto key = *GetThreadIdKey();
int thread_id = base::Thread::GetThreadLocalInt(key);
if (thread_id == 0) {
thread_id = next_thread_id.fetch_add(1);
CHECK_LE(1, thread_id);
base::Thread::SetThreadLocalInt(key, thread_id);
}
return thread_id;
}
} // namespace internal
} // namespace v8