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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 // | 4 // |
5 // A send algorithm that adds pacing on top of an another send algorithm. | 5 // A send algorithm that adds pacing on top of an another send algorithm. |
6 // It uses the underlying sender's pacing rate to schedule packets. | 6 // It uses the underlying sender's pacing rate to schedule packets. |
7 // It also takes into consideration the expected granularity of the underlying | 7 // It also takes into consideration the expected granularity of the underlying |
8 // alarm to ensure that alarms are not set too aggressively, and err towards | 8 // alarm to ensure that alarms are not set too aggressively, and err towards |
9 // sending packets too early instead of too late. | 9 // sending packets too early instead of too late. |
10 | 10 |
11 #ifndef NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_ | 11 #ifndef NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_ |
12 #define NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_ | 12 #define NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_ |
13 | 13 |
14 #include <stdint.h> | 14 #include <stdint.h> |
15 | 15 |
16 #include <map> | 16 #include <map> |
17 #include <memory> | 17 #include <memory> |
18 | 18 |
19 #include "base/macros.h" | 19 #include "base/macros.h" |
20 #include "net/quic/congestion_control/send_algorithm_interface.h" | 20 #include "net/quic/core/congestion_control/send_algorithm_interface.h" |
21 #include "net/quic/quic_bandwidth.h" | 21 #include "net/quic/core/quic_bandwidth.h" |
22 #include "net/quic/quic_config.h" | 22 #include "net/quic/core/quic_config.h" |
23 #include "net/quic/quic_protocol.h" | 23 #include "net/quic/core/quic_protocol.h" |
24 #include "net/quic/quic_time.h" | 24 #include "net/quic/core/quic_time.h" |
25 | 25 |
26 namespace net { | 26 namespace net { |
27 | 27 |
28 class NET_EXPORT_PRIVATE PacingSender : public SendAlgorithmInterface { | 28 class NET_EXPORT_PRIVATE PacingSender : public SendAlgorithmInterface { |
29 public: | 29 public: |
30 // Create a PacingSender to wrap the specified sender. |alarm_granularity| | 30 // Create a PacingSender to wrap the specified sender. |alarm_granularity| |
31 // indicates to the pacer to send that far into the future, since it should | 31 // indicates to the pacer to send that far into the future, since it should |
32 // not expect a callback before that time delta. |initial_packet_burst| is | 32 // not expect a callback before that time delta. |initial_packet_burst| is |
33 // the number of packets sent without pacing after quiescence. | 33 // the number of packets sent without pacing after quiescence. |
34 PacingSender(SendAlgorithmInterface* sender, | 34 PacingSender(SendAlgorithmInterface* sender, |
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84 QuicTime last_delayed_packet_sent_time_; | 84 QuicTime last_delayed_packet_sent_time_; |
85 QuicTime ideal_next_packet_send_time_; // When can the next packet be sent. | 85 QuicTime ideal_next_packet_send_time_; // When can the next packet be sent. |
86 mutable bool was_last_send_delayed_; // True when the last send was delayed. | 86 mutable bool was_last_send_delayed_; // True when the last send was delayed. |
87 | 87 |
88 DISALLOW_COPY_AND_ASSIGN(PacingSender); | 88 DISALLOW_COPY_AND_ASSIGN(PacingSender); |
89 }; | 89 }; |
90 | 90 |
91 } // namespace net | 91 } // namespace net |
92 | 92 |
93 #endif // NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_ | 93 #endif // NET_QUIC_CONGESTION_CONTROL_PACING_SENDER_H_ |
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