1 // Copyright (c) 2011 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 5 #include "remoting/base/running_average.h" 6 7 #include "base/logging.h" 8 9 namespace remoting { 10 RunningAverage(int window_size)11RunningAverage::RunningAverage(int window_size) 12 : window_size_(window_size), 13 sum_(0) { 14 DCHECK_GT(window_size, 0); 15 } 16 ~RunningAverage()17RunningAverage::~RunningAverage() { 18 } 19 Record(int64 value)20void RunningAverage::Record(int64 value) { 21 base::AutoLock auto_lock(lock_); 22 23 data_points_.push_back(value); 24 sum_ += value; 25 26 if (data_points_.size() > window_size_) { 27 sum_ -= data_points_[0]; 28 data_points_.pop_front(); 29 } 30 } 31 Average()32double RunningAverage::Average() { 33 base::AutoLock auto_lock(lock_); 34 35 if (data_points_.empty()) 36 return 0; 37 return static_cast<double>(sum_) / data_points_.size(); 38 } 39 40 } // namespace remoting 41