skewed_single_thread_task_runner.h 1.9 KB

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  1. // Copyright 2014 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. #ifndef MEDIA_CAST_TEST_SKEWED_SINGLE_THREAD_TASK_RUNNER_H_
  5. #define MEDIA_CAST_TEST_SKEWED_SINGLE_THREAD_TASK_RUNNER_H_
  6. #include "base/callback.h"
  7. #include "base/task/single_thread_task_runner.h"
  8. #include "base/test/simple_test_tick_clock.h"
  9. #include "base/test/test_pending_task.h"
  10. namespace media {
  11. namespace cast {
  12. namespace test {
  13. // This class wraps a SingleThreadTaskRunner, and allows you to scale
  14. // the delay for any posted task by a factor. The factor is changed by
  15. // calling SetSkew(). A skew of 2.0 means that all delayed task will
  16. // have to wait twice as long.
  17. class SkewedSingleThreadTaskRunner final : public base::SingleThreadTaskRunner {
  18. public:
  19. explicit SkewedSingleThreadTaskRunner(
  20. const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
  21. SkewedSingleThreadTaskRunner(const SkewedSingleThreadTaskRunner&) = delete;
  22. SkewedSingleThreadTaskRunner& operator=(const SkewedSingleThreadTaskRunner&) =
  23. delete;
  24. // Set the delay multiplier to |skew|.
  25. void SetSkew(double skew);
  26. // base::SingleThreadTaskRunner implementation.
  27. bool PostDelayedTask(const base::Location& from_here,
  28. base::OnceClosure task,
  29. base::TimeDelta delay) final;
  30. bool RunsTasksInCurrentSequence() const final;
  31. // This function is currently not used, and will return false.
  32. bool PostNonNestableDelayedTask(const base::Location& from_here,
  33. base::OnceClosure task,
  34. base::TimeDelta delay) final;
  35. protected:
  36. ~SkewedSingleThreadTaskRunner() final;
  37. private:
  38. double skew_;
  39. scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  40. };
  41. } // namespace test
  42. } // namespace cast
  43. } // namespace media
  44. #endif // MEDIA_CAST_TEST_SKEWED_SINGLE_THREAD_TASK_RUNNER_H_