content/child/worker_thread_task_runner.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_CHILD_WORKER_THREAD_TASK_RUNNER_H_
   6 #define CONTENT_CHILD_WORKER_THREAD_TASK_RUNNER_H_
   7
   8 #include "base/task_runner.h"
   9
  10 namespace content {
  11
  12 // A task runner that runs tasks on a single webkit worker thread which
  13 // is managed by WorkerTaskRunner.
  14 // Note that this implementation ignores the delay duration for PostDelayedTask
  15 // and have it behave the same as PostTask.
  16 class WorkerThreadTaskRunner : public base::TaskRunner {
  17  public:
  18   explicit WorkerThreadTaskRunner(int worker_thread_id);
  19
  20   // Gets the WorkerThreadTaskRunner for the current worker thread.
  21   // This returns non-null value only when it is called on a worker thread.
  22   static scoped_refptr<WorkerThreadTaskRunner> current();
  23
  24   // TaskRunner overrides.
  25   bool PostDelayedTask(const tracked_objects::Location& from_here,
  26                        const base::Closure& task,
  27                        base::TimeDelta delay) override;
  28   bool RunsTasksOnCurrentThread() const override;
  29
  30  protected:
  31   ~WorkerThreadTaskRunner() override;
  32
  33  private:
  34   const int worker_thread_id_;
  35 };
  36
  37 }  // namespace content
  38
  39 #endif  // CONTENT_CHILD_WORKER_THREAD_TASK_RUNNER_H_