Issue 4692 - Dont' keep a strong reference from timer thread

src/JsEngine.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 46 matching lines @@
   public:
     static void Init()
     {
       // it's threadsafe since C++11 and it will be instantiated only once and
       // destroyed at the application exit
       static V8Initializer initializer;
     }
   };
 }
 
+using namespace AdblockPlus;
+
 AdblockPlus::ScopedV8Isolate::ScopedV8Isolate()
 {
   V8Initializer::Init();
   isolate = v8::Isolate::New();
 }
 
 AdblockPlus::ScopedV8Isolate::~ScopedV8Isolate()
 {
   isolate->Dispose();
   isolate = nullptr;
 }
 
+JsEngine::TimerTaskInfo::~TimerTaskInfo()
+{
+  for (auto& arg : arguments)
+    arg->Dispose();
+}
+
+JsEngine::TimerTask JsEngine::CreateTimerTask(const v8::Arguments& arguments)
+{
+  if (arguments.Length() < 2)
+    throw std::runtime_error("setTimeout requires at least 2 parameters");
+
+  if (!arguments[0]->IsFunction())
+    throw std::runtime_error("First argument to setTimeout must be a function");
+
+  auto timerTaskInfoIterator = timerTaskInfos.emplace(timerTaskInfos.end());
+  timerTaskInfoIterator->delay = arguments[1]->IntegerValue();
+
+  for (int i = 0; i < arguments.Length(); i++)
+    timerTaskInfoIterator->arguments.emplace_back(new v8::Persistent<v8::Value>(GetIsolate(), arguments[i]));
+  TimerTask retValue = { shared_from_this(), timerTaskInfoIterator };
+  return retValue;
+}
+
+void JsEngine::CallTimerTask(TimerTaskInfos::const_iterator timerTaskInfoIterator)
+{
+  const JsContext context(shared_from_this());
+  JsValue callback(shared_from_this(), v8::Local<v8::Value>::New(GetIsolate(), *timerTaskInfoIterator->arguments[0]));
+  JsValueList callbackArgs;
+  for (int i = 2; i < timerTaskInfoIterator->arguments.size(); i++)
+    callbackArgs.emplace_back(new JsValue(shared_from_this(),
+    v8::Local<v8::Value>::New(GetIsolate(), *timerTaskInfoIterator->arguments[i])));
+  callback.Call(callbackArgs);
+  timerTaskInfos.erase(timerTaskInfoIterator);
+}
+
 AdblockPlus::JsEngine::JsEngine(const ScopedV8IsolatePtr& isolate)
   : isolate(isolate)
 {
 }
 
 AdblockPlus::JsEnginePtr AdblockPlus::JsEngine::New(const AppInfo& appInfo, const ScopedV8IsolatePtr& isolate)
 {
   JsEnginePtr result(new JsEngine(isolate));
 
   const v8::Locker locker(result->GetIsolate());
@@ skipping 184 matching lines @@
 
 
 void AdblockPlus::JsEngine::SetGlobalProperty(const std::string& name, 
                                               AdblockPlus::JsValuePtr value)
 {
   auto global = GetGlobalObject();
   if (!global)
     throw std::runtime_error("Global object cannot be null");
   global->SetProperty(name, value);
 }