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1 // Copyright 2014 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_PINNABLE_BUFFER_PIECE_H_ | |
6 #define NET_SPDY_SPDY_PINNABLE_BUFFER_PIECE_H_ | |
7 | |
8 #include <memory> | |
9 | |
10 #include "base/memory/scoped_ptr.h" | |
11 #include "base/strings/string_piece.h" | |
12 #include "net/base/net_export.h" | |
13 | |
14 namespace net { | |
15 | |
16 class SpdyPrefixedBufferReader; | |
17 | |
18 // Helper class of SpdyPrefixedBufferReader. | |
19 // Represents a piece of consumed buffer which may (or may not) own its | |
20 // underlying storage. Users may "pin" the buffer at a later time to ensure | |
21 // a SpdyPinnableBufferPiece owns and retains storage of the buffer. | |
22 struct NET_EXPORT_PRIVATE SpdyPinnableBufferPiece { | |
23 public: | |
24 SpdyPinnableBufferPiece(); | |
25 ~SpdyPinnableBufferPiece(); | |
26 | |
27 const char * buffer() const { | |
28 return buffer_; | |
29 } | |
30 | |
31 size_t length() const { | |
32 return length_; | |
33 } | |
34 | |
35 operator base::StringPiece() const { | |
36 return base::StringPiece(buffer_, length_); | |
37 } | |
38 | |
39 // Allocates and copies the buffer to internal storage. | |
40 void Pin(); | |
41 | |
42 bool IsPinned() const { | |
43 return storage_.get() != NULL; | |
44 } | |
45 | |
46 // Swaps buffers, including internal storage, with |other|. | |
47 void Swap(SpdyPinnableBufferPiece* other); | |
48 | |
49 private: | |
50 friend class SpdyPrefixedBufferReader; | |
51 | |
52 const char * buffer_; | |
53 size_t length_; | |
54 // Null iff |buffer_| isn't pinned. | |
55 scoped_ptr<char[]> storage_; | |
56 }; | |
57 | |
58 } // namespace net | |
59 | |
60 #endif // NET_SPDY_SPDY_PINNABLE_BUFFER_PIECE_H_ | |
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