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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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