[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/bindings/core/v8/WrapperTypeInfo.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WrapperTypeInfo_h
 #define WrapperTypeInfo_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "gin/public/wrapper_info.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
 #include "wtf/Assertions.h"
 #include <v8.h>
 
 namespace blink {
 
 class EventTarget;
 class ScriptWrappable;
 
 ScriptWrappable* toScriptWrappable(const v8::PersistentBase<v8::Object>& wrapper);
 
 static const int v8DOMWrapperTypeIndex = static_cast<int>(gin::kWrapperInfoIndex);
 static const int v8DOMWrapperObjectIndex = static_cast<int>(gin::kEncodedValueIndex);
 static const int v8DefaultWrapperInternalFieldCount = static_cast<int>(gin::kNumberOfInternalFields);
 static const int v8PrototypeTypeIndex = 0;
 static const int v8PrototypeInternalFieldcount = 1;
 
 typedef v8::Local<v8::FunctionTemplate> (*DomTemplateFunction)(v8::Isolate*);
 typedef void (*RefObjectFunction)(ScriptWrappable*);
 typedef void (*DerefObjectFunction)(ScriptWrappable*);
 typedef void (*TraceFunction)(Visitor*, ScriptWrappable*);
+typedef ActiveScriptWrappable* (*ToActiveScriptWrappableFunction)(v8::Local<v8::Object>);
 typedef void (*ResolveWrapperReachabilityFunction)(v8::Isolate*, ScriptWrappable*, const v8::Persistent<v8::Object>&);
 typedef void (*PreparePrototypeAndInterfaceObjectFunction)(v8::Local<v8::Context>, v8::Local<v8::Object>, v8::Local<v8::Function>, v8::Local<v8::FunctionTemplate>);
 typedef void (*InstallConditionallyEnabledPropertiesFunction)(v8::Local<v8::Object>, v8::Isolate*);
 
 inline void setObjectGroup(v8::Isolate* isolate, ScriptWrappable* scriptWrappable, const v8::Persistent<v8::Object>& wrapper)
 {
     isolate->SetObjectGroupId(wrapper, v8::UniqueId(reinterpret_cast<intptr_t>(scriptWrappable)));
 }
 
 // This struct provides a way to store a bunch of information that is helpful when unwrapping
@@ skipping 107 matching lines @@
         if (preparePrototypeAndInterfaceObjectFunction)
             preparePrototypeAndInterfaceObjectFunction(context, prototypeObject, interfaceObject, interfaceTemplate);
     }
 
     void installConditionallyEnabledProperties(v8::Local<v8::Object> prototypeObject, v8::Isolate* isolate) const
     {
         if (installConditionallyEnabledPropertiesFunction)
             installConditionallyEnabledPropertiesFunction(prototypeObject, isolate);
     }
 
+    ActiveScriptWrappable* toActiveScriptWrappable(v8::Local<v8::Object> object) const
+    {
+        if (!toActiveScriptWrappableFunction)
+            return nullptr;
+        return toActiveScriptWrappableFunction(object);
+    }
+
+    bool hasPendingActivity(v8::Local<v8::Object> object) const
+    {
+        return !toActiveScriptWrappableFunction ? false : toActiveScriptWrappableFunction(object)->hasPendingActivity();
+    }
+
     EventTarget* toEventTarget(v8::Local<v8::Object>) const;
 
     void visitDOMWrapper(v8::Isolate* isolate, ScriptWrappable* scriptWrappable, const v8::Persistent<v8::Object>& wrapper) const
     {
         if (!visitDOMWrapperFunction)
             setObjectGroup(isolate, scriptWrappable, wrapper);
         else
             visitDOMWrapperFunction(isolate, scriptWrappable, wrapper);
     }
 
     // This field must be the first member of the struct WrapperTypeInfo. This is also checked by a static_assert() below.
     const gin::GinEmbedder ginEmbedder;
 
     DomTemplateFunction domTemplateFunction;
     const RefObjectFunction refObjectFunction;
     const DerefObjectFunction derefObjectFunction;
     const TraceFunction traceFunction;
+    const ToActiveScriptWrappableFunction toActiveScriptWrappableFunction;
     const ResolveWrapperReachabilityFunction visitDOMWrapperFunction;
     PreparePrototypeAndInterfaceObjectFunction preparePrototypeAndInterfaceObjectFunction;
     const InstallConditionallyEnabledPropertiesFunction installConditionallyEnabledPropertiesFunction;
     const char* const interfaceName;
     const WrapperTypeInfo* parentClass;
     const unsigned wrapperTypePrototype : 1; // WrapperTypePrototype
     const unsigned wrapperClassId : 2; // WrapperClassId
     const unsigned eventTargetInheritance : 1; // EventTargetInheritance
     const unsigned lifetime : 1; // Lifetime
     const unsigned gcType : 2; // GCType
@@ skipping 29 matching lines @@
 }
 
 inline const WrapperTypeInfo* toWrapperTypeInfo(v8::Local<v8::Object> wrapper)
 {
     return getInternalField<WrapperTypeInfo, v8DOMWrapperTypeIndex>(wrapper);
 }
 
 } // namespace blink
 
 #endif // WrapperTypeInfo_h