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// 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/logging.h"
#include "remoting/base/running_average.h"
namespace remoting {
RunningAverage::RunningAverage(int window_size)
: window_size_(window_size),
sum_(0) {
CHECK(window_size_);
}
RunningAverage::~RunningAverage() {
}
void RunningAverage::Record(int64 value) {
base::AutoLock auto_lock(lock_);
data_points_.push_back(value);
sum_ += value;
if (data_points_.size() > window_size_) {
sum_ -= data_points_[0];
data_points_.pop_front();
}
}
double RunningAverage::Average() {
base::AutoLock auto_lock(lock_);
if (data_points_.empty())
return 0;
return static_cast<double>(sum_) / data_points_.size();
}
} // namespace remoting
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