net/spdy/spdy_buffer_producer.h

   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   ~SimpleBufferProducer() override;
  39
  40   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_