| // Copyright 2015 The Chromium 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 "content/child/worker_thread_impl.h" |
| |
| #include "base/lazy_instance.h" |
| #include "base/logging.h" |
| #include "base/observer_list.h" |
| #include "base/threading/thread_local.h" |
| #include "content/child/worker_task_runner.h" |
| #include "content/common/content_export.h" |
| #include "content/public/child/worker_thread.h" |
| |
| namespace content { |
| |
| namespace { |
| |
| using WorkerThreadObservers = base::ObserverList<WorkerThread::Observer>; |
| using ThreadLocalWorkerThreadObservers = |
| base::ThreadLocalPointer<WorkerThreadObservers>; |
| |
| // Stores a WorkerThreadObservers instance per thread. |
| base::LazyInstance<ThreadLocalWorkerThreadObservers> g_observers_tls = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| } // namespace |
| |
| // WorkerThread: |
| |
| // static |
| int WorkerThread::GetCurrentId() { |
| if (!g_observers_tls.Get().Get()) |
| return 0; |
| return base::PlatformThread::CurrentId(); |
| } |
| |
| // static |
| void WorkerThread::PostTask(int id, const base::Closure& task) { |
| WorkerTaskRunner::Instance()->PostTask(id, task); |
| } |
| |
| // static |
| void WorkerThread::AddObserver(Observer* observer) { |
| DCHECK(GetCurrentId() > 0); |
| WorkerThreadObservers* observers = g_observers_tls.Get().Get(); |
| DCHECK(observers); |
| observers->AddObserver(observer); |
| } |
| |
| // static |
| void WorkerThread::RemoveObserver(Observer* observer) { |
| DCHECK(GetCurrentId() > 0); |
| WorkerThreadObservers* observers = g_observers_tls.Get().Get(); |
| DCHECK(observers); |
| observers->RemoveObserver(observer); |
| } |
| |
| // WorkerThreadImpl: |
| |
| // static |
| void WorkerThreadImpl::DidStartCurrentWorkerThread() { |
| ThreadLocalWorkerThreadObservers& observers_tls = g_observers_tls.Get(); |
| DCHECK(!observers_tls.Get()); |
| observers_tls.Set(new WorkerThreadObservers()); |
| } |
| |
| // static |
| void WorkerThreadImpl::WillStopCurrentWorkerThread() { |
| ThreadLocalWorkerThreadObservers& observers_tls = g_observers_tls.Get(); |
| WorkerThreadObservers* observers = observers_tls.Get(); |
| DCHECK(observers); |
| FOR_EACH_OBSERVER(WorkerThread::Observer, *observers, |
| WillStopCurrentWorkerThread()); |
| delete observers; |
| observers_tls.Set(nullptr); |
| } |
| |
| } // namespace content |