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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 #ifndef NET_QUIC_QUIC_STREAM_SEQUENCER_H_ | 5 #ifndef NET_QUIC_QUIC_STREAM_SEQUENCER_H_ |
6 #define NET_QUIC_QUIC_STREAM_SEQUENCER_H_ | 6 #define NET_QUIC_QUIC_STREAM_SEQUENCER_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
| 9 #include <string> |
9 | 10 |
10 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
11 #include "net/base/iovec.h" | 12 #include "net/base/iovec.h" |
12 #include "net/quic/quic_protocol.h" | 13 #include "net/quic/quic_protocol.h" |
13 | 14 |
14 using std::map; | |
15 using std::string; | |
16 | |
17 namespace net { | 15 namespace net { |
18 | 16 |
19 namespace test { | 17 namespace test { |
20 class QuicStreamSequencerPeer; | 18 class QuicStreamSequencerPeer; |
21 } // namespace test | 19 } // namespace test |
22 | 20 |
23 class QuicSession; | 21 class QuicSession; |
24 class ReliableQuicStream; | 22 class ReliableQuicStream; |
25 | 23 |
26 // Buffers frames until we have something which can be passed | 24 // Buffers frames until we have something which can be passed |
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96 ReliableQuicStream* stream_; | 94 ReliableQuicStream* stream_; |
97 | 95 |
98 // The last data consumed by the stream. | 96 // The last data consumed by the stream. |
99 QuicStreamOffset num_bytes_consumed_; | 97 QuicStreamOffset num_bytes_consumed_; |
100 | 98 |
101 // TODO(alyssar) use something better than strings. | 99 // TODO(alyssar) use something better than strings. |
102 // TODO(rjshade): In future we may support retransmission of partial stream | 100 // TODO(rjshade): In future we may support retransmission of partial stream |
103 // frames, in which case we will have to allow receipt of overlapping frames. | 101 // frames, in which case we will have to allow receipt of overlapping frames. |
104 // Maybe write new frames into a ring buffer, and keep track of consumed | 102 // Maybe write new frames into a ring buffer, and keep track of consumed |
105 // bytes, and gaps. | 103 // bytes, and gaps. |
106 typedef map<QuicStreamOffset, string> FrameMap; | 104 typedef std::map<QuicStreamOffset, std::string> FrameMap; |
107 | 105 |
108 // Stores buffered frames (maps from sequence number -> frame data as string). | 106 // Stores buffered frames (maps from sequence number -> frame data as string). |
109 FrameMap buffered_frames_; | 107 FrameMap buffered_frames_; |
110 | 108 |
111 // The offset, if any, we got a stream termination for. When this many bytes | 109 // The offset, if any, we got a stream termination for. When this many bytes |
112 // have been processed, the sequencer will be closed. | 110 // have been processed, the sequencer will be closed. |
113 QuicStreamOffset close_offset_; | 111 QuicStreamOffset close_offset_; |
114 | 112 |
115 // If true, the sequencer is blocked from passing data to the stream and will | 113 // If true, the sequencer is blocked from passing data to the stream and will |
116 // buffer all new incoming data until FlushBufferedFrames is called. | 114 // buffer all new incoming data until FlushBufferedFrames is called. |
117 bool blocked_; | 115 bool blocked_; |
118 | 116 |
119 // Tracks how many bytes the sequencer has buffered. | 117 // Tracks how many bytes the sequencer has buffered. |
120 size_t num_bytes_buffered_; | 118 size_t num_bytes_buffered_; |
121 | 119 |
122 // Count of the number of frames received. | 120 // Count of the number of frames received. |
123 int num_frames_received_; | 121 int num_frames_received_; |
124 | 122 |
125 // Count of the number of duplicate frames received. | 123 // Count of the number of duplicate frames received. |
126 int num_duplicate_frames_received_; | 124 int num_duplicate_frames_received_; |
127 | 125 |
128 DISALLOW_COPY_AND_ASSIGN(QuicStreamSequencer); | 126 DISALLOW_COPY_AND_ASSIGN(QuicStreamSequencer); |
129 }; | 127 }; |
130 | 128 |
131 } // namespace net | 129 } // namespace net |
132 | 130 |
133 #endif // NET_QUIC_QUIC_STREAM_SEQUENCER_H_ | 131 #endif // NET_QUIC_QUIC_STREAM_SEQUENCER_H_ |
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