blob: ab5f762aacfbadc72e9fe918154a79c8b7968d8d [file] [log] [blame]
// 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 "base/macros.h"
#include "base/time/time.h"
namespace remoting {
class LeakyBucket {
static const int kUnlimitedDepth = -1;
// |depth| specifies depth of the bucket in drops. kUnlimitedDepth indicate
// that bucket size is unlimited. |rate| is specified in drops per second.
LeakyBucket(int depth, int rate);
// If the bucket can fit |drops| then adds them and returns true. Otherwise
// returns false.
bool RefillOrSpill(int drops, base::TimeTicks now);
// Updates rate.
void UpdateRate(int new_rate, base::TimeTicks now);
// Returns time when the bucket will be empty. The returned value may be in
// the past.
base::TimeTicks GetEmptyTime();
int rate() { return rate_; }
void UpdateLevel(base::TimeTicks now);
int depth_;
int rate_;
// |current_level_| stores water level at |level_updated_time_|. Updated in
// UpdateLevel(), which is called from RefillOrSpill() and UpdateRate().
int current_level_;
base::TimeTicks level_updated_time_;
} // namespace remoting