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| 1 // Copyright 2013 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 "net/quic/quic_ack_notifier.h" | |
| 6 | |
| 7 #include <set> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "base/stl_util.h" | |
| 11 | |
| 12 using base::hash_map; | |
| 13 using std::make_pair; | |
| 14 | |
| 15 namespace net { | |
| 16 | |
| 17 QuicAckNotifier::DelegateInterface::DelegateInterface() {} | |
| 18 | |
| 19 QuicAckNotifier::DelegateInterface::~DelegateInterface() {} | |
| 20 | |
| 21 QuicAckNotifier::QuicAckNotifier(DelegateInterface* delegate) | |
| 22 : delegate_(delegate), | |
| 23 unacked_packets_(0), | |
| 24 retransmitted_packet_count_(0), | |
| 25 retransmitted_byte_count_(0) { | |
| 26 DCHECK(delegate); | |
| 27 } | |
| 28 | |
| 29 QuicAckNotifier::~QuicAckNotifier() { | |
| 30 } | |
| 31 | |
| 32 void QuicAckNotifier::OnSerializedPacket() { | |
| 33 ++unacked_packets_; | |
| 34 } | |
| 35 | |
| 36 bool QuicAckNotifier::OnAck(QuicTime::Delta delta_largest_observed) { | |
| 37 if (unacked_packets_ <= 0) { | |
| 38 LOG(DFATAL) << "Acked more packets than were tracked." | |
| 39 << " unacked_packets:" << unacked_packets_; | |
| 40 return true; | |
| 41 } | |
| 42 --unacked_packets_; | |
| 43 if (!HasUnackedPackets()) { | |
| 44 // We have seen all the sequence numbers we were waiting for, trigger | |
| 45 // callback notification. | |
| 46 delegate_->OnAckNotification(retransmitted_packet_count_, | |
| 47 retransmitted_byte_count_, | |
| 48 delta_largest_observed); | |
| 49 return true; | |
| 50 } | |
| 51 return false; | |
| 52 } | |
| 53 | |
| 54 bool QuicAckNotifier::OnPacketAbandoned() { | |
| 55 if (unacked_packets_ <= 0) { | |
| 56 LOG(DFATAL) << "Abandoned more packets than were tracked." | |
| 57 << " unacked_packets:" << unacked_packets_; | |
| 58 return true; | |
| 59 } | |
| 60 --unacked_packets_; | |
| 61 return unacked_packets_ == 0; | |
| 62 } | |
| 63 | |
| 64 void QuicAckNotifier::OnPacketRetransmitted(int packet_payload_size) { | |
| 65 ++retransmitted_packet_count_; | |
| 66 retransmitted_byte_count_ += packet_payload_size; | |
| 67 } | |
| 68 | |
| 69 }; // namespace net | |
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