MTP Streaming: Readahead Buffer

net/base/io_buffer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_BASE_IO_BUFFER_H_
 #define NET_BASE_IO_BUFFER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 140 matching lines @@
   // Returns the number of unconsumed bytes.
   int BytesRemaining() const;
 
   // Returns the number of consumed bytes.
   int BytesConsumed() const;
 
   // Seeks to an arbitrary point in the buffer. The notion of bytes consumed
   // and remaining are updated appropriately.
   void SetOffset(int bytes);
 
+  // Changes the size of the buffer. Caller is responsible for ensuring that
+  // the new size does not exceed the size of the base buffer.
+  void SetSize(int size);

[vandebo (ex-Chrome), 2014/03/04 21:55:12]

I don't think we want to add this.  If that means no reuse, so be it.

[tommycli, 2014/03/04 23:03:44]

Done.

+
   int size() const { return size_; }
 
  private:
   virtual ~DrainableIOBuffer();
 
   scoped_refptr<IOBuffer> base_;
   int size_;
   int used_;
 };
 
@@ skipping 64 matching lines @@
  public:
   explicit WrappedIOBuffer(const char* data);
 
  protected:
   virtual ~WrappedIOBuffer();
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_IO_BUFFER_H_