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// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_DOM_GLOBAL_STATS_H_
#define COBALT_DOM_GLOBAL_STATS_H_
#include "base/compiler_specific.h"
#include "base/memory/singleton.h"
#include "cobalt/base/c_val.h"
namespace cobalt {
namespace xhr {
class XMLHttpRequest;
} // namespace xhr
namespace dom {
class Attr;
class DOMStringMap;
class DOMTokenList;
class HTMLCollection;
class NamedNodeMap;
class Node;
class NodeList;
// This singleton class is used to track DOM-related statistics.
class GlobalStats {
public:
static GlobalStats* GetInstance();
bool CheckNoLeaks();
void Add(Attr* object);
void Add(DOMStringMap* object);
void Add(DOMTokenList* object);
void Add(HTMLCollection* object);
void Add(NamedNodeMap* object);
void Add(Node* object);
void Add(NodeList* object);
void AddEventListener();
void Remove(Attr* object);
void Remove(DOMStringMap* object);
void Remove(DOMTokenList* object);
void Remove(HTMLCollection* object);
void Remove(NamedNodeMap* object);
void Remove(Node* object);
void Remove(NodeList* object);
void RemoveEventListener();
int GetNumEventListeners() const { return num_event_listeners_; }
int GetNumNodes() const { return num_nodes_; }
void StartJavaScriptEvent();
void StopJavaScriptEvent();
void Add(xhr::XMLHttpRequest* object);
void Remove(xhr::XMLHttpRequest* object);
void IncreaseXHRMemoryUsage(size_t delta);
void DecreaseXHRMemoryUsage(size_t delta);
private:
GlobalStats();
~GlobalStats();
// DOM-related tracking
base::CVal<int> num_attrs_;
base::CVal<int> num_dom_string_maps_;
base::CVal<int> num_dom_token_lists_;
base::CVal<int, base::CValPublic> num_event_listeners_;
base::CVal<int> num_html_collections_;
base::CVal<int> num_named_node_maps_;
base::CVal<int, base::CValPublic> num_nodes_;
base::CVal<int> num_node_lists_;
base::CVal<int> num_active_java_script_events_;
// XHR-related tracking
base::CVal<int> num_xhrs_;
base::CVal<base::cval::SizeInBytes> xhr_memory_;
friend struct DefaultSingletonTraits<GlobalStats>;
DISALLOW_COPY_AND_ASSIGN(GlobalStats);
};
} // namespace dom
} // namespace cobalt
#endif // COBALT_DOM_GLOBAL_STATS_H_