Oilpan: mark ThreadAffinity as MainThreadOnly for Node or CSSValue inheriting classes.

Source/heap/ThreadState.h

 /*
  * Copyright (C) 2013 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 53 matching lines @@
 //
 // FIXME: We should evaluate the performance gain. Having
 // ThreadAffinity is complicating the implementation and we should get
 // rid of it if it is fast enough to go through thread-local storage
 // always.
 enum ThreadAffinity {
     AnyThread,
     MainThreadOnly,
 };
 
-// By default all types are considered to be used on the main thread only.
+class Node;
+class CSSValue;
+
+template<typename T, bool derivesNodeOrCSSValue = WTF::IsSubclass<T, Node>::value || WTF::IsSubclass<T, CSSValue>::value > struct DefaultThreadingTrait;
+
+template<typename T>
+struct DefaultThreadingTrait<T, false> {
+    static const ThreadAffinity Affinity = AnyThread;
+};
+
+template<typename T>
+struct DefaultThreadingTrait<T, true> {
+    static const ThreadAffinity Affinity = MainThreadOnly;
+};
+
 template<typename T>
 struct ThreadingTrait {
-    static const ThreadAffinity Affinity = MainThreadOnly;
+    static const ThreadAffinity Affinity = DefaultThreadingTrait<T>::Affinity;
 };
 
 // Marks the specified class as being used from multiple threads. When
 // a class is used from multiple threads we go through thread local
 // storage to get the heap in which to allocate an object of that type
 // and when allocating a Persistent handle for an object with that
 // type. Notice that marking the base class does not automatically
 // mark its descendants and they have to be explicitly marked.
 #define USED_FROM_MULTIPLE_THREADS(Class)                 \
     class Class;                                          \
@@ skipping 450 matching lines @@
         ASSERT(ThreadState::isMainThread());
         return ThreadState::mainThreadState();
     }
 };
 
 template<> class ThreadStateFor<AnyThread> {
 public:
     static ThreadState* state() { return ThreadState::current(); }
 };
 
-// FIXME: Experiment if the threading affinity really matters for performance.
-// FIXME: Move these macros and other related structures to a separate file.
-USED_FROM_MULTIPLE_THREADS(Crypto);
-USED_FROM_MULTIPLE_THREADS(DOMParser);
-USED_FROM_MULTIPLE_THREADS(DOMURL);
-USED_FROM_MULTIPLE_THREADS(DeprecatedStorageQuota);
-USED_FROM_MULTIPLE_THREADS(Event);
-USED_FROM_MULTIPLE_THREADS(EventSource);
-USED_FROM_MULTIPLE_THREADS(EventTarget);
-USED_FROM_MULTIPLE_THREADS(Key);
-USED_FROM_MULTIPLE_THREADS(KeyAlgorithm);
-USED_FROM_MULTIPLE_THREADS(KeyPair);
-USED_FROM_MULTIPLE_THREADS(MemoryInfo);
-USED_FROM_MULTIPLE_THREADS(MessageEvent);
-USED_FROM_MULTIPLE_THREADS(Notification);
-USED_FROM_MULTIPLE_THREADS(NotificationCenter);
-USED_FROM_MULTIPLE_THREADS(Performance);
-USED_FROM_MULTIPLE_THREADS(PerformanceEntry);
-USED_FROM_MULTIPLE_THREADS(PerformanceMark);
-USED_FROM_MULTIPLE_THREADS(PerformanceNavigation);
-USED_FROM_MULTIPLE_THREADS(PerformanceResourceTiming);
-USED_FROM_MULTIPLE_THREADS(PerformanceTiming);
-USED_FROM_MULTIPLE_THREADS(SubtleCrypto);
-USED_FROM_MULTIPLE_THREADS(TextDecoder);
-USED_FROM_MULTIPLE_THREADS(TextEncoder);
-USED_FROM_MULTIPLE_THREADS(UserTiming);
-USED_FROM_MULTIPLE_THREADS(WebKitNotification);
-USED_FROM_MULTIPLE_THREADS(WorkerCrypto);
-USED_FROM_MULTIPLE_THREADS(WorkerPerformance);
-USED_FROM_MULTIPLE_THREADS(XMLHttpRequest);
-USED_FROM_MULTIPLE_THREADS(XMLSerializer);
-USED_FROM_MULTIPLE_THREADS(XPathEvaluator);
-USED_FROM_MULTIPLE_THREADS(XPathExpression);
-USED_FROM_MULTIPLE_THREADS(XPathNSResolver);
-USED_FROM_MULTIPLE_THREADS(XPathResult);
-USED_FROM_MULTIPLE_THREADS(XSLTProcessor);
-
 }
 
 #endif // ThreadState_h