content/child/scheduler/nestable_single_thread_task_runner.h

   1 // Copyright 2015 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_SCHEDULER_NESTABLE_SINGLE_THREAD_TASK_RUNNER_H_
   6 #define CONTENT_CHILD_SCHEDULER_NESTABLE_SINGLE_THREAD_TASK_RUNNER_H_
   7
   8 #include "base/single_thread_task_runner.h"
   9 #include "content/common/content_export.h"
  10
  11 namespace content {
  12
  13 // A single thread task runner which exposes whether it is running nested.
  14 class CONTENT_EXPORT NestableSingleThreadTaskRunner
  15     : public base::SingleThreadTaskRunner {
  16  public:
  17   NestableSingleThreadTaskRunner() {}
  18
  19   // Returns true if the task runner is nested (i.e., running a run loop within
  20   // a nested task).
  21   virtual bool IsNested() const = 0;
  22
  23  protected:
  24   ~NestableSingleThreadTaskRunner() override {}
  25
  26   DISALLOW_COPY_AND_ASSIGN(NestableSingleThreadTaskRunner);
  27 };
  28
  29 }  // namespace content
  30
  31 #endif  // CONTENT_CHILD_SCHEDULER_NESTABLE_SINGLE_THREAD_TASK_RUNNER_H_