| // Copyright 2016 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 "remoting/base/running_samples.h" |
| |
| #include <algorithm> |
| |
| #include "base/check_op.h" |
| |
| namespace remoting { |
| |
| RunningSamples::RunningSamples(int window_size) |
| : window_size_(window_size) { |
| DCHECK_GT(window_size, 0); |
| } |
| |
| RunningSamples::~RunningSamples() { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| } |
| |
| void RunningSamples::Record(int64_t value) { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| data_points_.push_back(value); |
| sum_ += value; |
| |
| if (data_points_.size() > window_size_) { |
| sum_ -= data_points_.front(); |
| data_points_.pop_front(); |
| } |
| } |
| |
| double RunningSamples::Average() const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| if (data_points_.empty()) |
| return 0; |
| return static_cast<double>(sum_) / data_points_.size(); |
| } |
| |
| int64_t RunningSamples::Max() const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| if (data_points_.empty()) |
| return 0; |
| |
| return *std::max_element(data_points_.begin(), data_points_.end()); |
| } |
| |
| bool RunningSamples::IsEmpty() const { |
| return data_points_.empty(); |
| } |
| |
| } // namespace remoting |