Reland r17877 - Introduce a v8::Platform class that bundles embedder callbacks

src/api.cc

 // Copyright 2012 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5027 matching lines @@
   // Obscure semantics for undefined, but somehow checked in our unit tests...
   if (obj->IsUndefined()) return NULL;
   i::Object* foreign = i::JSObject::cast(obj)->GetInternalField(0);
   return i::Foreign::cast(foreign)->foreign_address();
 }
 
 
 // --- E n v i r o n m e n t ---
 
 
+void v8::V8::InitializePlatform(Platform* platform) {
+#ifdef V8_USE_DEFAULT_PLATFORM
+  FATAL("Can't override v8::Platform when using default implementation");
+#else
+  i::V8::InitializePlatform(platform);
+#endif
+}
+
+
+void v8::V8::ShutdownPlatform() {
+#ifdef V8_USE_DEFAULT_PLATFORM
+  FATAL("Can't override v8::Platform when using default implementation");
+#else
+  i::V8::ShutdownPlatform();
+#endif
+}
+
+
 bool v8::V8::Initialize() {
   i::Isolate* isolate = i::Isolate::UncheckedCurrent();
   if (isolate != NULL && isolate->IsInitialized()) {
     return true;
   }
   return InitializeHelper(isolate);
 }
 
 
 void v8::V8::SetEntropySource(EntropySource entropy_source) {
@@ skipping 2602 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal