Move shared files in net/quic/ into net/quic/core/

net/quic/congestion_control/pacing_sender.h

-// Copyright (c) 2013 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.
-//
-// A send algorithm that adds pacing on top of an another send algorithm.
-// It uses the underlying sender's pacing rate to schedule packets.
-// It also takes into consideration the expected granularity of the underlying
-// alarm to ensure that alarms are not set too aggressively, and err towards
-// sending packets too early instead of too late.
-
-#ifndef NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_
-#define NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_
-
-#include <stdint.h>
-
-#include <map>
-#include <memory>
-
-#include "base/macros.h"
-#include "net/quic/congestion_control/send_algorithm_interface.h"
-#include "net/quic/quic_bandwidth.h"
-#include "net/quic/quic_config.h"
-#include "net/quic/quic_protocol.h"
-#include "net/quic/quic_time.h"
-
-namespace net {
-
-class NET_EXPORT_PRIVATE PacingSender : public SendAlgorithmInterface {
- public:
-  // Create a PacingSender to wrap the specified sender.  |alarm_granularity|
-  // indicates to the pacer to send that far into the future, since it should
-  // not expect a callback before that time delta.  |initial_packet_burst| is
-  // the number of packets sent without pacing after quiescence.
-  PacingSender(SendAlgorithmInterface* sender,
-               QuicTime::Delta alarm_granularity,
-               uint32_t initial_packet_burst);
-  ~PacingSender() override;
-
-  void SetMaxPacingRate(QuicBandwidth max_pacing_rate);
-
-  // SendAlgorithmInterface methods.
-  void SetFromConfig(const QuicConfig& config,
-                     Perspective perspective) override;
-  void ResumeConnectionState(
-      const CachedNetworkParameters& cached_network_params,
-      bool max_bandwidth_resumption) override;
-  void SetNumEmulatedConnections(int num_connections) override;
-  void OnCongestionEvent(bool rtt_updated,
-                         QuicByteCount bytes_in_flight,
-                         const CongestionVector& acked_packets,
-                         const CongestionVector& lost_packets) override;
-  bool OnPacketSent(QuicTime sent_time,
-                    QuicByteCount bytes_in_flight,
-                    QuicPacketNumber packet_number,
-                    QuicByteCount bytes,
-                    HasRetransmittableData is_retransmittable) override;
-  void OnRetransmissionTimeout(bool packets_retransmitted) override;
-  void OnConnectionMigration() override;
-  QuicTime::Delta TimeUntilSend(QuicTime now,
-                                QuicByteCount bytes_in_flight) const override;
-  QuicBandwidth PacingRate(QuicByteCount bytes_in_flight) const override;
-  QuicBandwidth BandwidthEstimate() const override;
-  QuicTime::Delta RetransmissionDelay() const override;
-  QuicByteCount GetCongestionWindow() const override;
-  bool InSlowStart() const override;
-  bool InRecovery() const override;
-  QuicByteCount GetSlowStartThreshold() const override;
-  CongestionControlType GetCongestionControlType() const override;
-  // End implementation of SendAlgorithmInterface.
-
- private:
-  std::unique_ptr<SendAlgorithmInterface> sender_;  // Underlying sender.
-  // The estimated system alarm granularity.
-  const QuicTime::Delta alarm_granularity_;
-  // Configured maximum size of the burst coming out of quiescence.  The burst
-  // is never larger than the current CWND in packets.
-  const uint32_t initial_packet_burst_;
-  // If not QuicBandidth::Zero, the maximum rate the PacingSender will use.
-  QuicBandwidth max_pacing_rate_;
-
-  // Number of unpaced packets to be sent before packets are delayed.
-  uint32_t burst_tokens_;
-  // Send time of the last packet considered delayed.
-  QuicTime last_delayed_packet_sent_time_;
-  QuicTime ideal_next_packet_send_time_;  // When can the next packet be sent.
-  mutable bool was_last_send_delayed_;  // True when the last send was delayed.
-
-  DISALLOW_COPY_AND_ASSIGN(PacingSender);
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_