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