Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(2061)

Unified Diff: base/timer.h

Issue 624713003: Keep only base/extractor.[cc|h]. (Closed) Base URL: https://chromium.googlesource.com/external/omaha.git@master
Patch Set: Created 6 years, 2 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « base/time_unittest.cc ('k') | base/timer.cc » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: base/timer.h
diff --git a/base/timer.h b/base/timer.h
deleted file mode 100644
index 3198d31b3b37a6124674304f1fc0cbf1af1c1fc1..0000000000000000000000000000000000000000
--- a/base/timer.h
+++ /dev/null
@@ -1,186 +0,0 @@
-// Copyright 2003-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-//
-// Timing
-
-#ifndef OMAHA_BASE_TIMER_H_
-#define OMAHA_BASE_TIMER_H_
-
-#include "omaha/base/time.h"
-
-namespace omaha {
-
-// Low resolution timer which can be used to time loops. The resolution depends
-// on the platform and can be expected to be about 10 ms on Windows 2000 and up.
-class LowResTimer {
- public:
- explicit LowResTimer(bool running);
- ~LowResTimer();
-
- // LowResTimer keeps track of elapsed time, which can consist of multiple
- // Start()-Stop() intervals.
- void Start();
-
- // Returns time between Start and Stop call and increments the time elapsed.
- uint32 Stop();
- void Reset();
-
- // Return time in seconds, milliseconds.
- double GetSeconds() const;
- uint32 GetMilliseconds() const;
-
- // Gets the number of iteration this timer was started/stopped.
- uint32 GetIterations() const { return iterations_; }
- bool IsRunning() const { return running_; }
-
- private:
-
- bool running_;
- uint32 start_;
- uint32 elapsed_;
- uint32 iterations_;
-
- DISALLOW_EVIL_CONSTRUCTORS(LowResTimer);
-};
-
-inline double LowResTimer::GetSeconds() const {
- return static_cast<double>(GetMilliseconds()) / 1000;
-}
-
-// WARNING - Timer is implemented on top of RDTSC and
-// QueryPerformanceCounter which have undefined behavior when running
-// on multi-core, speedstep, bugs in HAL, certain chipsets, etc.
-// Do not use the Timer in production code where the execution flow
-// depends on timing. Timer is primarily intended to be used for
-// code profiling and performance measurements.
-class Timer {
- public:
- explicit Timer(bool running);
- ~Timer();
-
- // Timer keeps track of elapsed time, which can consist of multiple
- // Start()-Stop() intervals.
- void Start();
-
- // returns time for last split (elapsed time since Start() or time since
- // last Split(), whichever came last) as well as total elapsed time.
- void Split(double* split_time_ms, double* total_time_ms);
-
- // returns time elapsed (in hi-res perf-counts) between Start and Stop call
- // and increments the time elapsed_
- time64 Stop();
- void Reset();
-
- // return time in seconds, milliseconds, etc.
- double GetSeconds() const;
- double GetMilliseconds() const;
- double GetMicroseconds() const;
- double GetNanoseconds() const;
- time64 Get100Nanoseconds() const;
-
- // TODO(omaha): Probably should have been a static method, or even
- // standalone func convert the high-perf counter to nano-seconds
- double PerfCountToNanoSeconds(time64 perf_count) const;
-
- // get the number of iteration this timer was started/stopped
- uint32 GetIterations() const { return iterations_; }
- bool IsRunning() const { return running_; }
-
- // useful funcs beyond just the Timer class
- static time64 GetRdtscCounter(); // return perf-counter value
- static time64 GetRdtscFrequency(); // return perf-counter frequency
-
- // outputs total time, number of iterations, and the average time
-#ifdef _DEBUG
- CString DebugString() const;
-#endif
-
- private:
-
- bool running_;
- time64 start_;
- time64 split_;
- time64 elapsed_;
- uint32 iterations_;
- static time64 count_freq_;
-
- DISALLOW_EVIL_CONSTRUCTORS(Timer);
-};
-
-// lint -e{533} Function should return a value
-// lint -e{31} Redefinition of symbol
-__forceinline time64 Timer::GetRdtscCounter() { __asm rdtsc }
-
-inline double Timer::PerfCountToNanoSeconds(time64 perf_count) const {
- return (static_cast<double>(perf_count) / static_cast<double>(count_freq_)) *
- static_cast<double>(1000000000.0);
-}
-
-inline double Timer::GetSeconds() const {
- return GetNanoseconds() / 1000000000;
-}
-
-inline double Timer::GetMilliseconds() const {
- return GetNanoseconds() / 1000000;
-}
-
-inline double Timer::GetMicroseconds() const {
- return GetNanoseconds() / 1000;
-}
-
-inline time64 Timer::Get100Nanoseconds() const {
- return (time64) GetNanoseconds() / 100;
-}
-
-// Helper class which starts the timer in its constructor and stops it
-// in its destructor. This prevents accidentally leaving the timer running
-// if a function has an early exit.
-//
-// Usage:
-//
-// class A {
-// Timer timer_;
-//
-// void foo(){
-// TimerScope (timer_);
-// ......
-// } // end foo
-//
-// Everything is timed till the end of the function or when it returns
-// from any place.
-
-class TimerScope {
- public:
- explicit TimerScope(Timer *timer) : timer_(timer) {
- if (timer_) {
- timer_->Start();
- }
- }
-
- ~TimerScope() {
- if (timer_ && timer_->IsRunning()) {
- timer_->Stop();
- }
- }
-
- private:
- Timer *timer_;
- DISALLOW_EVIL_CONSTRUCTORS(TimerScope);
-};
-
-} // namespace omaha
-
-#endif // OMAHA_BASE_TIMER_H_
-
« no previous file with comments | « base/time_unittest.cc ('k') | base/timer.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698