| // Copyright (c) 2011 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. |
| |
| #include "base/timer/hi_res_timer_manager.h" |
| |
| #include <algorithm> |
| |
| #include "base/atomicops.h" |
| #include "base/task_scheduler/post_task.h" |
| #include "base/time/time.h" |
| |
| namespace base { |
| |
| namespace { |
| |
| constexpr TimeDelta kUsageSampleInterval = TimeDelta::FromMinutes(10); |
| |
| void ReportHighResolutionTimerUsage() { |
| // Reset usage for the next interval. |
| Time::ResetHighResolutionTimerUsage(); |
| } |
| |
| } // namespace |
| |
| HighResolutionTimerManager::HighResolutionTimerManager() |
| : hi_res_clock_available_(false) { |
| // Start polling the high resolution timer usage. |
| Time::ResetHighResolutionTimerUsage(); |
| timer_.Start(FROM_HERE, kUsageSampleInterval, |
| Bind(&ReportHighResolutionTimerUsage)); |
| } |
| |
| HighResolutionTimerManager::~HighResolutionTimerManager() { |
| UseHiResClock(false); |
| } |
| |
| void HighResolutionTimerManager::UseHiResClock(bool use) { |
| if (use == hi_res_clock_available_) |
| return; |
| hi_res_clock_available_ = use; |
| Time::EnableHighResolutionTimer(use); |
| } |
| |
| } // namespace base |