| /* |
| * 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_SCRIPT_JAVASCRIPT_ENGINE_H_ |
| #define COBALT_SCRIPT_JAVASCRIPT_ENGINE_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/scoped_ptr.h" |
| |
| namespace cobalt { |
| namespace script { |
| |
| class GlobalEnvironment; |
| |
| class JavaScriptEngine { |
| public: |
| // Initialize a JavaScript engine. The JavaScript engine should only be |
| // accessed from the thread that called CreateEngine. |
| // This function is defined per-implementation. |
| static scoped_ptr<JavaScriptEngine> CreateEngine(); |
| |
| // Create a new JavaScript global object proxy. |
| virtual scoped_refptr<GlobalEnvironment> CreateGlobalEnvironment() = 0; |
| |
| // Kick off the engine's garbage collection synchronously. |
| virtual void CollectGarbage() = 0; |
| |
| // Indicate to the JS heap that extra bytes have been allocated by some |
| // Javascript object. This may mean collection needs to happen sooner. |
| virtual void ReportExtraMemoryCost(size_t bytes) = 0; |
| |
| // Updates the memory usage and returns the total memory that is reserved by |
| // the engine. This includes the part that is actually occupied by JS objects, |
| // and the part that is not yet. |
| virtual size_t UpdateMemoryStatsAndReturnReserved() = 0; |
| |
| protected: |
| virtual ~JavaScriptEngine() {} |
| friend class scoped_ptr<JavaScriptEngine>; |
| }; |
| |
| } // namespace script |
| } // namespace cobalt |
| |
| #endif // COBALT_SCRIPT_JAVASCRIPT_ENGINE_H_ |