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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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