Basic HTTP pipelining support

net/http/http_stream_factory_impl.h

 // Copyright (c) 2011 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_HTTP_STREAM_FACTORY_IMPL_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_
 
 #include <map>
 #include <set>
 
 #include "base/memory/ref_counted.h"
 #include "net/base/host_port_pair.h"
+#include "net/base/net_log.h"
+#include "net/http/http_pipelined_host_pool.h"
 #include "net/http/http_stream_factory.h"
-#include "net/base/net_log.h"
 #include "net/proxy/proxy_server.h"
 
 namespace net {
 
 class HttpNetworkSession;
+class HttpPipelinedHost;
 class SpdySession;
 
 class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
  public:
   explicit HttpStreamFactoryImpl(HttpNetworkSession* session);
   virtual ~HttpStreamFactoryImpl();
 
   // HttpStreamFactory Interface
   virtual HttpStreamRequest* RequestStream(
       const HttpRequestInfo& info,
       const SSLConfig& server_ssl_config,
       const SSLConfig& proxy_ssl_config,
       HttpStreamRequest::Delegate* delegate,
       const BoundNetLog& net_log);
 
   virtual void PreconnectStreams(int num_streams,
                                  const HttpRequestInfo& info,
                                  const SSLConfig& server_ssl_config,
                                  const SSLConfig& proxy_ssl_config,
                                  const BoundNetLog& net_log);
   virtual void AddTLSIntolerantServer(const HostPortPair& server);
   virtual bool IsTLSIntolerantServer(const HostPortPair& server) const;
 
+  // Called when a HttpPipelinedHost has new capacity. Attempts to allocate any
+  // pending pipeline-capable requests to pipelines.
+  virtual void OnHttpPipelinedHostHasAdditionalCapacity(
+      const HostPortPair& origin);
+
  private:
   class Request;
   class Job;
 
   typedef std::set<Request*> RequestSet;
   typedef std::map<HostPortProxyPair, RequestSet> SpdySessionRequestMap;
+  typedef std::map<HostPortPair, RequestSet> HttpPipeliningRequestMap;
 
   bool GetAlternateProtocolRequestFor(const GURL& original_url,
                                       GURL* alternate_url) const;
 
   // Detaches |job| from |request|.
   void OrphanJob(Job* job, const Request* request);
 
   // Called when a SpdySession is ready. It will find appropriate Requests and
   // fulfill them. |direct| indicates whether or not |spdy_session| uses a
   // proxy.
@@ skipping 22 matching lines @@
   HttpNetworkSession* const session_;
 
   std::set<HostPortPair> tls_intolerant_servers_;
 
   // All Requests are handed out to clients. By the time HttpStreamFactoryImpl
   // is destroyed, all Requests should be deleted (which should remove them from
   // |request_map_|. The Requests will delete the corresponding job.
   std::map<const Job*, Request*> request_map_;
 
   SpdySessionRequestMap spdy_session_request_map_;
+  HttpPipeliningRequestMap http_pipelining_request_map_;
+
+  HttpPipelinedHostPool http_pipelined_host_pool_;
 
   // These jobs correspond to jobs orphaned by Requests and now owned by
   // HttpStreamFactoryImpl. Since they are no longer tied to Requests, they will
   // not be canceled when Requests are canceled. Therefore, in
   // ~HttpStreamFactoryImpl, it is possible for some jobs to still exist in this
   // set. Leftover jobs will be deleted when the factory is destroyed.
   std::set<const Job*> orphaned_job_set_;
 
   // These jobs correspond to preconnect requests and have no associated Request
   // object. They're owned by HttpStreamFactoryImpl. Leftover jobs will be
   // deleted when the factory is destroyed.
   std::set<const Job*> preconnect_job_set_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamFactoryImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_