A scoped NetLog event that automatically logs an end event on destruction.

net/base/net_log.cc

 // Copyright (c) 2010 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/base/net_log.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 176 matching lines @@
   return dict;
 }
 
 Value* NetLogSourceParameter::ToValue() const {
   DictionaryValue* dict = new DictionaryValue();
 
   dict->Set(name_, value_.ToValue());
   return dict;
 }
 
+ScopedNetLogEvent::ScopedNetLogEvent(
+    const BoundNetLog& net_log,
+    NetLog::EventType event_type,
+    const scoped_refptr<NetLog::EventParameters>& params)
+    : net_log_(net_log),
+      event_type_(event_type),
+      end_event_parameters_(NULL) {

[eroman, 2010/12/09 02:00:14]

nit: I have always seen this omitted in chrome code, and rely on default
constructor.

[mmenke, 2010/12/09 15:12:01]

Done.

+  net_log_.BeginEvent(event_type, params);
+}
+
+ScopedNetLogEvent::~ScopedNetLogEvent() {
+  net_log_.EndEvent(event_type_, end_event_parameters_);
+}
+
+void ScopedNetLogEvent::SetEndEventParameters(
+    const scoped_refptr<NetLog::EventParameters>& end_event_parameters) {
+  DCHECK(!end_event_parameters_.get());
+  end_event_parameters_ = end_event_parameters;
+}
+
+const BoundNetLog& ScopedNetLogEvent::net_log() const {
+  return net_log_;
+}
+
 }  // namespace net