| // Copyright (c) 2012 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. |
| |
| #ifndef WEBKIT_CHILD_WORKER_TASK_RUNNER_H_ |
| #define WEBKIT_CHILD_WORKER_TASK_RUNNER_H_ |
| |
| #include <map> |
| |
| #include "base/atomic_sequence_num.h" |
| #include "base/callback_forward.h" |
| #include "base/synchronization/lock.h" |
| #include "base/threading/thread_local.h" |
| #include "third_party/WebKit/public/platform/WebWorkerRunLoop.h" |
| #include "webkit/child/webkit_child_export.h" |
| |
| namespace webkit_glue { |
| |
| class WEBKIT_CHILD_EXPORT WorkerTaskRunner { |
| public: |
| WorkerTaskRunner(); |
| |
| bool PostTask(int id, const base::Closure& task); |
| int PostTaskToAllThreads(const base::Closure& task); |
| int CurrentWorkerId(); |
| static WorkerTaskRunner* Instance(); |
| |
| class WEBKIT_CHILD_EXPORT Observer { |
| public: |
| virtual ~Observer() {} |
| virtual void OnWorkerRunLoopStopped() = 0; |
| }; |
| // Add/Remove an observer that will get notified when the current worker run |
| // loop is stopping. This observer will not get notified when other threads |
| // are stopping. It's only valid to call these on a worker thread. |
| void AddStopObserver(Observer* observer); |
| void RemoveStopObserver(Observer* observer); |
| |
| private: |
| friend class WebKitPlatformSupportChildImpl; |
| friend class WorkerTaskRunnerTest; |
| |
| typedef std::map<int, blink::WebWorkerRunLoop> IDToLoopMap; |
| |
| ~WorkerTaskRunner(); |
| void OnWorkerRunLoopStarted(const blink::WebWorkerRunLoop& loop); |
| void OnWorkerRunLoopStopped(const blink::WebWorkerRunLoop& loop); |
| |
| struct ThreadLocalState; |
| base::ThreadLocalPointer<ThreadLocalState> current_tls_; |
| |
| base::AtomicSequenceNumber id_sequence_; |
| IDToLoopMap loop_map_; |
| base::Lock loop_map_lock_; |
| }; |
| |
| } // namespace webkit_glue |
| |
| #endif // WEBKIT_CHILD_WORKER_TASK_RUNNER_H_ |