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      1 // Copyright 2016 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 BASE_TASK_SCHEDULER_SCOPED_SET_TASK_PRIORITY_FOR_CURRENT_THREAD_H_
      6 #define BASE_TASK_SCHEDULER_SCOPED_SET_TASK_PRIORITY_FOR_CURRENT_THREAD_H_
      7 
      8 #include "base/base_export.h"
      9 #include "base/macros.h"
     10 #include "base/task_scheduler/task_traits.h"
     11 
     12 namespace base {
     13 namespace internal {
     14 
     15 class BASE_EXPORT ScopedSetTaskPriorityForCurrentThread {
     16  public:
     17   // Within the scope of this object, GetTaskPriorityForCurrentThread() will
     18   // return |priority|.
     19   ScopedSetTaskPriorityForCurrentThread(TaskPriority priority);
     20   ~ScopedSetTaskPriorityForCurrentThread();
     21 
     22  private:
     23   const TaskPriority priority_;
     24 
     25   DISALLOW_COPY_AND_ASSIGN(ScopedSetTaskPriorityForCurrentThread);
     26 };
     27 
     28 // Returns the priority of the TaskScheduler task running on the current thread,
     29 // or TaskPriority::USER_VISIBLE if no TaskScheduler task is running on the
     30 // current thread.
     31 BASE_EXPORT TaskPriority GetTaskPriorityForCurrentThread();
     32 
     33 }  // namespace internal
     34 }  // namespace base
     35 
     36 #endif  // BASE_TASK_SCHEDULER_SCOPED_SET_TASK_PRIORITY_FOR_CURRENT_THREAD_H_
     37