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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_BUFFER_PRODUCER_H_ | |
6 #define NET_SPDY_SPDY_BUFFER_PRODUCER_H_ | |
7 | |
8 #include <memory> | |
9 | |
10 #include "base/compiler_specific.h" | |
11 #include "base/macros.h" | |
12 #include "net/base/net_export.h" | |
13 | |
14 namespace net { | |
15 | |
16 class SpdyBuffer; | |
17 | |
18 // An object which provides a SpdyBuffer for writing. We pass these | |
19 // around instead of SpdyBuffers since some buffers have to be | |
20 // generated "just in time". | |
21 class NET_EXPORT_PRIVATE SpdyBufferProducer { | |
22 public: | |
23 SpdyBufferProducer(); | |
24 | |
25 // Produces the buffer to be written. Will be called at most once. | |
26 virtual std::unique_ptr<SpdyBuffer> ProduceBuffer() = 0; | |
27 | |
28 virtual ~SpdyBufferProducer(); | |
29 | |
30 // Returns the estimate of dynamically allocated memory in bytes. | |
31 virtual size_t EstimateMemoryUsage() const = 0; | |
32 | |
33 private: | |
34 DISALLOW_COPY_AND_ASSIGN(SpdyBufferProducer); | |
35 }; | |
36 | |
37 // A simple wrapper around a single SpdyBuffer. | |
38 class NET_EXPORT_PRIVATE SimpleBufferProducer : public SpdyBufferProducer { | |
39 public: | |
40 explicit SimpleBufferProducer(std::unique_ptr<SpdyBuffer> buffer); | |
41 | |
42 ~SimpleBufferProducer() override; | |
43 | |
44 std::unique_ptr<SpdyBuffer> ProduceBuffer() override; | |
45 | |
46 size_t EstimateMemoryUsage() const override; | |
47 | |
48 private: | |
49 std::unique_ptr<SpdyBuffer> buffer_; | |
50 | |
51 DISALLOW_COPY_AND_ASSIGN(SimpleBufferProducer); | |
52 }; | |
53 | |
54 } // namespace net | |
55 | |
56 #endif // NET_SPDY_SPDY_BUFFER_PRODUCER_H_ | |
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