Save pipelining capabilities for the most used hosts between sessions.

net/http/http_pipelined_host_impl.cc

 // 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.
 
 #include "net/http/http_pipelined_host_impl.h"
 
 #include "base/stl_util.h"
 #include "net/http/http_pipelined_connection_impl.h"
 #include "net/http/http_pipelined_stream.h"
 
@@ skipping 16 matching lines @@
     return new HttpPipelinedConnectionImpl(connection, delegate,
                                            used_ssl_config, used_proxy_info,
                                            net_log, was_npn_negotiated);
   }
 };
 
 HttpPipelinedHostImpl::HttpPipelinedHostImpl(
     HttpPipelinedHost::Delegate* delegate,
     const HostPortPair& origin,
     HttpPipelinedConnection::Factory* factory,
-    Capability capability)
+    HttpPipelinedHostCapability capability)
     : delegate_(delegate),
       origin_(origin),
       factory_(factory),
       capability_(capability) {
   if (!factory) {
     factory_.reset(new HttpPipelinedConnectionImplFactory());
   }
 }
 
 HttpPipelinedHostImpl::~HttpPipelinedHostImpl() {
   CHECK(pipelines_.empty());
 }
 
 HttpPipelinedStream* HttpPipelinedHostImpl::CreateStreamOnNewPipeline(
     ClientSocketHandle* connection,
     const SSLConfig& used_ssl_config,
     const ProxyInfo& used_proxy_info,
     const BoundNetLog& net_log,
     bool was_npn_negotiated) {
-  if (capability_ == INCAPABLE) {
+  if (capability_ == PIPELINE_INCAPABLE) {
     return NULL;
   }
   HttpPipelinedConnection* pipeline = factory_->CreateNewPipeline(
       connection, this, used_ssl_config, used_proxy_info, net_log,
       was_npn_negotiated);
   PipelineInfo info;
   pipelines_.insert(std::make_pair(pipeline, info));
   return pipeline->CreateNewStream();
 }
 
@@ skipping 49 matching lines @@
   }
 }
 
 void HttpPipelinedHostImpl::OnPipelineFeedback(
     HttpPipelinedConnection* pipeline,
     HttpPipelinedConnection::Feedback feedback) {
   CHECK(ContainsKey(pipelines_, pipeline));
   switch (feedback) {
     case HttpPipelinedConnection::OK:
       ++pipelines_[pipeline].num_successes;
-      if (capability_ == UNKNOWN) {
-        capability_ = PROBABLY_CAPABLE;
+      if (capability_ == PIPELINE_UNKNOWN) {
+        capability_ = PIPELINE_PROBABLY_CAPABLE;
         NotifyAllPipelinesHaveCapacity();
-      } else if (capability_ == PROBABLY_CAPABLE &&
+      } else if (capability_ == PIPELINE_PROBABLY_CAPABLE &&
                  pipelines_[pipeline].num_successes >=
                      kNumKnownSuccessesThreshold) {
-        capability_ = CAPABLE;
-        delegate_->OnHostDeterminedCapability(this, CAPABLE);
+        capability_ = PIPELINE_CAPABLE;
+        delegate_->OnHostDeterminedCapability(this, PIPELINE_CAPABLE);
       }
       break;
 
     case HttpPipelinedConnection::PIPELINE_SOCKET_ERROR:
     case HttpPipelinedConnection::OLD_HTTP_VERSION:
-      capability_ = INCAPABLE;
-      delegate_->OnHostDeterminedCapability(this, INCAPABLE);
+      capability_ = PIPELINE_INCAPABLE;
+      delegate_->OnHostDeterminedCapability(this, PIPELINE_INCAPABLE);
       break;
 
     case HttpPipelinedConnection::MUST_CLOSE_CONNECTION:
       break;
   }
 }
 
 int HttpPipelinedHostImpl::GetPipelineCapacity() const {
   int capacity = 0;
   switch (capability_) {
-    case CAPABLE:
-    case PROBABLY_CAPABLE:
+    case PIPELINE_CAPABLE:
+    case PIPELINE_PROBABLY_CAPABLE:
       capacity = max_pipeline_depth();
       break;
 
-    case INCAPABLE:
+    case PIPELINE_INCAPABLE:
       CHECK(false);
 
-    case UNKNOWN:
+    case PIPELINE_UNKNOWN:
       capacity = 1;
       break;
 
     default:
       CHECK(false) << "Unkown pipeline capability: " << capability_;
   }
   return capacity;
 }
 
 bool HttpPipelinedHostImpl::CanPipelineAcceptRequests(
     HttpPipelinedConnection* pipeline) const {
-  return capability_ != INCAPABLE &&
+  return capability_ != PIPELINE_INCAPABLE &&
       pipeline->usable() &&
       pipeline->active() &&
       pipeline->depth() < GetPipelineCapacity();
 }
 
 void HttpPipelinedHostImpl::NotifyAllPipelinesHaveCapacity() {
   // Calling OnPipelineHasCapacity() can have side effects that include
   // deleting and removing entries from |pipelines_|.
   PipelineInfoMap pipelines_to_notify = pipelines_;
   for (PipelineInfoMap::iterator it = pipelines_to_notify.begin();
        it != pipelines_to_notify.end(); ++it) {
     if (pipelines_.find(it->first) != pipelines_.end()) {
       OnPipelineHasCapacity(it->first);
     }
   }
 }
 
 HttpPipelinedHostImpl::PipelineInfo::PipelineInfo()
     : num_successes(0) {
 }
 
 }  // namespace net