Coalesce small buffers in net::BidirectionalStream

net/http/bidirectional_stream_impl.h

 // Copyright 2015 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_HTTP_BIDIRECTIONAL_STREAM_IMPL_H_
 #define NET_HTTP_BIDIRECTIONAL_STREAM_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 18 matching lines @@
 // operation completes synchronously or asynchronously.
 // BidirectionalStreamImpl once created by HttpStreamFactoryImpl should be owned
 // by BidirectionalStream.
 class NET_EXPORT_PRIVATE BidirectionalStreamImpl {
  public:
   // Delegate to handle BidirectionalStreamImpl events.
   class NET_EXPORT_PRIVATE Delegate {
    public:
     Delegate();
 
-    // Called when the request headers have been sent.
+    // Called when the stream is ready for reading and writing.
     // The delegate may call BidirectionalStreamImpl::ReadData to start reading,
     // call BidirectionalStreamImpl::SendData to send data,
     // or call BidirectionalStreamImpl::Cancel to cancel the stream.
     // The delegate should not call BidirectionalStreamImpl::Cancel
     // during this callback.
-    virtual void OnHeadersSent() = 0;
+    virtual void OnStreamReady() = 0;
 
     // Called when response headers are received.
     // This is called at most once for the lifetime of a stream.
     // The delegate may call BidirectionalStreamImpl::ReadData to start
     // reading, call BidirectionalStreamImpl::SendData to send data,
     // or call BidirectionalStreamImpl::Cancel to cancel the stream.
     virtual void OnHeadersReceived(const SpdyHeaderBlock& response_headers) = 0;
 
     // Called when read is completed asynchronously. |bytes_read| specifies how
     // much data is available.
@@ skipping 28 matching lines @@
 
   BidirectionalStreamImpl();
 
   // |this| should not be destroyed during Delegate::OnHeadersSent or
   // Delegate::OnDataSent.
   virtual ~BidirectionalStreamImpl();
 
   // Starts the BidirectionalStreamImpl and sends request headers.
   virtual void Start(const BidirectionalStreamRequestInfo* request_info,
                      const BoundNetLog& net_log,
+                     bool disable_auto_flush,
                      BidirectionalStreamImpl::Delegate* delegate,
                      std::unique_ptr<base::Timer> timer) = 0;
 
   // Reads at most |buf_len| bytes into |buf|. Returns the number of bytes read,
   // ERR_IO_PENDING if the read is to be completed asynchronously, or an error
   // code if any error occurred. If returns 0, there is no more data to read.
   // This should not be called before Delegate::OnHeadersReceived is invoked,
   // and should not be called again unless it returns with number greater than
   // 0 or until Delegate::OnDataRead is invoked.
   virtual int ReadData(IOBuffer* buf, int buf_len) = 0;
 
   // Sends data. This should not be called be called before
   // Delegate::OnHeadersSent is invoked, and should not be called again until
   // Delegate::OnDataSent is invoked. If |end_stream| is true, the DATA frame
   // will have an END_STREAM flag.
   virtual void SendData(IOBuffer* data, int length, bool end_stream) = 0;
 
+  virtual void SendvData(const std::vector<IOBuffer*>& buffers,
+                         const std::vector<int>& lengths,
+                         bool end_stream) = 0;
+
   // Cancels the stream. No Delegate method will be called. Any pending
   // operations may or may not succeed.
   virtual void Cancel() = 0;
 
   // Returns the protocol used by this stream. If stream has not been
   // established, return kProtoUnknown.
   virtual NextProto GetProtocol() const = 0;
 
   // Total number of bytes received over the network of SPDY data, headers, and
   // push_promise frames associated with this stream, including the size of
   // frame headers, after SSL decryption and not including proxy overhead.
   virtual int64_t GetTotalReceivedBytes() const = 0;
 
   // Total number of bytes sent over the network of SPDY frames associated with
   // this stream, including the size of frame headers, before SSL encryption and
   // not including proxy overhead. Note that some SPDY frames such as pings are
   // not associated with any stream, and are not included in this value.
   virtual int64_t GetTotalSentBytes() const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BidirectionalStreamImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_BIDIRECTIONAL_STREAM_IMPL_H_