Issue 5450 - move FilterEngine into Platform

src/Platform.cpp

 /*
 * This file is part of Adblock Plus <https://adblockplus.org/>,
 * Copyright (C) 2006-2017 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 60 matching lines @@
     return;
   jsEngine = JsEngine::New(appInfo, *this);
 }
 
 std::shared_ptr<JsEngine> Platform::GetJsEngine()
 {
   SetUpJsEngine();
   return jsEngine;
 }
 
+void Platform::CreateFilterEngineAsync(const FilterEngine::CreationParameters& parameters,
+  const OnFilterEngineCreatedCallback& onCreated)
+{
+  std::shared_ptr<std::promise<FilterEnginePtr>> filterEnginePromise;
+  {
+    std::lock_guard<std::mutex> lock(modulesMutex);
+    if (filterEngine.valid())
+      return;
+    filterEnginePromise = std::make_shared<std::promise<FilterEnginePtr>>();
+    filterEngine = filterEnginePromise->get_future();
+  }
+
+  FilterEngine::CreateAsync(GetJsEngine(), [this, onCreated, filterEnginePromise](const FilterEnginePtr& filterEngine)
+  {
+    filterEnginePromise->set_value(filterEngine);
+    if (onCreated)
+      onCreated(filterEngine);
+  }, parameters);
+}
+
+FilterEnginePtr Platform::GetFilterEngine()
+{
+  CreateFilterEngineAsync();
+  return std::shared_future<FilterEnginePtr>(filterEngine).get();
+}
+
 ITimer& Platform::GetTimer()
 {
   return *timer;
 }
 
 IFileSystem& Platform::GetFileSystem()
 {
   return *fileSystem;
 }
 
 IWebRequest& Platform::GetWebRequest()
 {
   return *webRequest;
 }
 
 LogSystem& Platform::GetLogSystem()
 {
   return *logSystem;
 }