| Index: chrome/browser/sync/util/highres_timer-linux.h | 
| =================================================================== | 
| --- chrome/browser/sync/util/highres_timer-linux.h	(revision 26149) | 
| +++ chrome/browser/sync/util/highres_timer-linux.h	(working copy) | 
| @@ -1,79 +0,0 @@ | 
| -// Copyright (c) 2009 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. | 
| -// | 
| -// High resolution timer functions for use in Linux. | 
| - | 
| -#ifndef CHROME_BROWSER_SYNC_UTIL_HIGHRES_TIMER_LINUX_H_ | 
| -#define CHROME_BROWSER_SYNC_UTIL_HIGHRES_TIMER_LINUX_H_ | 
| - | 
| -#include "base/basictypes.h" | 
| - | 
| -#include <sys/time.h> | 
| - | 
| -const uint64 MICROS_IN_SECOND = 1000000L; | 
| - | 
| -// A handy class for reliably measuring wall-clock time with decent resolution. | 
| -// | 
| -// We want to measure time with high resolution on Linux. What to do? | 
| -// | 
| -// RDTSC? Sure, but how do you convert it to wall clock time? | 
| -// clock_gettime? It's not in all Linuxes. | 
| -// | 
| -// Let's just use gettimeofday; it's good to the microsecond. | 
| -class HighresTimer { | 
| - public: | 
| -  // Captures the current start time. | 
| -  HighresTimer(); | 
| - | 
| -  // Captures the current tick, can be used to reset a timer for reuse. | 
| -  void Start(); | 
| - | 
| -  // Returns the elapsed ticks with full resolution. | 
| -  uint64 GetElapsedTicks() const; | 
| - | 
| -  // Returns the elapsed time in milliseconds, rounded to the nearest | 
| -  // millisecond. | 
| -  uint64 GetElapsedMs() const; | 
| - | 
| -  // Returns the elapsed time in seconds, rounded to the nearest second. | 
| -  uint64 GetElapsedSec() const; | 
| - | 
| -  uint64 start_ticks() const { return start_ticks_; } | 
| - | 
| -  // Returns timer frequency from cache, should be less overhead than | 
| -  // ::QueryPerformanceFrequency. | 
| -  static uint64 GetTimerFrequency(); | 
| -  // Returns current ticks. | 
| -  static uint64 GetCurrentTicks(); | 
| - | 
| - private: | 
| -  // Captured start time. | 
| -  uint64 start_ticks_; | 
| -}; | 
| - | 
| -inline HighresTimer::HighresTimer() { | 
| -  Start(); | 
| -} | 
| - | 
| -inline void HighresTimer::Start() { | 
| -  start_ticks_ = GetCurrentTicks(); | 
| -} | 
| - | 
| -inline uint64 HighresTimer::GetTimerFrequency() { | 
| -  // Fixed; one "tick" is one microsecond. | 
| -  return MICROS_IN_SECOND; | 
| -} | 
| - | 
| -inline uint64 HighresTimer::GetCurrentTicks() { | 
| -  timeval tv; | 
| -  gettimeofday(&tv, 0); | 
| - | 
| -  return tv.tv_sec * MICROS_IN_SECOND + tv.tv_usec; | 
| -} | 
| - | 
| -inline uint64 HighresTimer::GetElapsedTicks() const { | 
| -  return start_ticks_ - GetCurrentTicks(); | 
| -} | 
| - | 
| -#endif  // CHROME_BROWSER_SYNC_UTIL_HIGHRES_TIMER_LINUX_H_ | 
|  |