| // Copyright 2015 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_PUBLIC_THREAD_CPU_THROTTLER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_PUBLIC_THREAD_CPU_THROTTLER_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "third_party/blink/renderer/platform/platform_export.h" |
| |
| namespace base { |
| template <typename T> |
| struct DefaultSingletonTraits; |
| }; |
| |
| namespace blink { |
| namespace scheduler { |
| |
| // This class is used to slow down the main thread for |
| // inspector "cpu throttling". It does it by spawning an |
| // additional thread which frequently interrupts main thread |
| // and sleeps. |
| class PLATFORM_EXPORT ThreadCPUThrottler final { |
| public: |
| static ThreadCPUThrottler* GetInstance(); |
| |
| // |rate| is a slow-down factor - passing 2.0 will make |
| // everything two times slower. |
| // Any rate less or equal to 1.0 disables throttling and |
| // cleans up helper thread. |
| void SetThrottlingRate(double rate); |
| |
| private: |
| ThreadCPUThrottler(); |
| ~ThreadCPUThrottler(); |
| friend struct base::DefaultSingletonTraits<ThreadCPUThrottler>; |
| |
| class ThrottlingThread; |
| std::unique_ptr<ThrottlingThread> throttling_thread_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ThreadCPUThrottler); |
| }; |
| |
| } // namespace scheduler |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_PUBLIC_THREAD_CPU_THROTTLER_H_ |