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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef NET_SPDY_SPDY_READ_QUEUE_H_ | |
6 #define NET_SPDY_SPDY_READ_QUEUE_H_ | |
7 | |
8 #include <cstddef> | |
9 #include <deque> | |
10 #include <memory> | |
11 | |
12 #include "base/macros.h" | |
13 #include "net/base/net_export.h" | |
14 | |
15 namespace net { | |
16 | |
17 class SpdyBuffer; | |
18 | |
19 // A FIFO queue of incoming data from a SPDY connection. Useful for | |
20 // SpdyStream delegates. | |
21 class NET_EXPORT_PRIVATE SpdyReadQueue { | |
22 public: | |
23 SpdyReadQueue(); | |
24 ~SpdyReadQueue(); | |
25 | |
26 // Returns whether there's anything in the queue. | |
27 bool IsEmpty() const; | |
28 | |
29 // Returns the total number of bytes in the queue. | |
30 size_t GetTotalSize() const; | |
31 | |
32 // Enqueues the bytes in |buffer|. | |
33 void Enqueue(std::unique_ptr<SpdyBuffer> buffer); | |
34 | |
35 // Dequeues up to |len| (which must be positive) bytes into | |
36 // |out|. Returns the number of bytes dequeued. | |
37 size_t Dequeue(char* out, size_t len); | |
38 | |
39 // Removes all bytes from the queue. | |
40 void Clear(); | |
41 | |
42 private: | |
43 // Class invariant: | |
44 // |total_size_| is the sum of GetRemainingSize() of |queue_|'s elements. | |
45 std::deque<std::unique_ptr<SpdyBuffer>> queue_; | |
46 size_t total_size_; | |
47 | |
48 DISALLOW_COPY_AND_ASSIGN(SpdyReadQueue); | |
49 }; | |
50 | |
51 } // namespace net | |
52 | |
53 #endif // NET_SPDY_SPDY_READ_QUEUE_H_ | |
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