Add support for per-isolate private symbols

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 6118 matching lines @@
   LOG_API(isolate, "v8::DataView::New(void*, size_t, size_t)");
   ENTER_V8(isolate);
   i::Handle<i::JSDataView> obj = isolate->factory()->NewJSDataView();
   i::Handle<i::JSArrayBuffer> buffer = Utils::OpenHandle(*array_buffer);
   SetupArrayBufferView(
       isolate, obj, buffer, byte_offset, byte_length);
   return Utils::ToLocal(obj);
 }
 
 
-Local<Symbol> v8::Symbol::New(Isolate* isolate, const char* data, int length) {
+Local<Symbol> v8::Symbol::New(Isolate* isolate, Local<String> name) {
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
   EnsureInitializedForIsolate(i_isolate, "v8::Symbol::New()");
   LOG_API(i_isolate, "Symbol::New()");
   ENTER_V8(i_isolate);
   i::Handle<i::Symbol> result = i_isolate->factory()->NewSymbol();
-  if (data != NULL) {
-    if (length == -1) length = i::StrLength(data);
-    i::Handle<i::String> name = i_isolate->factory()->NewStringFromUtf8(
-        i::Vector<const char>(data, length));
-    result->set_name(*name);
-  }
+  if (!name.IsEmpty()) result->set_name(*Utils::OpenHandle(*name));
   return Utils::ToLocal(result);
 }
 
 
-Local<Private> v8::Private::New(
-    Isolate* isolate, Local<String> name) {
+Local<Symbol> v8::Symbol::For(Isolate* isolate, Local<String> name) {
+  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  i::Handle<i::String> i_name = Utils::OpenHandle(*name);
+  i::Handle<i::JSObject> registry = i_isolate->GetSymbolRegistry();
+  i::Handle<i::String> part = i_isolate->factory()->for_string();
+  i::Handle<i::JSObject> symbols =
+      i::Handle<i::JSObject>::cast(i::JSObject::GetProperty(registry, part));
+  i::Handle<i::Object> symbol = i::JSObject::GetProperty(symbols, i_name);
+  if (!symbol->IsSymbol()) {
+    ASSERT(symbol->IsUndefined());
+    symbol = i_isolate->factory()->NewSymbol();
+    i::Handle<i::Symbol>::cast(symbol)->set_name(*i_name);
+    i::JSObject::SetProperty(symbols, i_name, symbol, NONE, i::STRICT);
+  }
+  return Utils::ToLocal(i::Handle<i::Symbol>::cast(symbol));
+}
+
+
+Local<Symbol> v8::Symbol::ForApi(Isolate* isolate, Local<String> name) {
+  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  i::Handle<i::String> i_name = Utils::OpenHandle(*name);
+  i::Handle<i::JSObject> registry = i_isolate->GetSymbolRegistry();
+  i::Handle<i::String> part = i_isolate->factory()->for_api_string();
+  i::Handle<i::JSObject> symbols =
+      i::Handle<i::JSObject>::cast(i::JSObject::GetProperty(registry, part));
+  i::Handle<i::Object> symbol = i::JSObject::GetProperty(symbols, i_name);
+  if (!symbol->IsSymbol()) {
+    ASSERT(symbol->IsUndefined());
+    symbol = i_isolate->factory()->NewSymbol();
+    i::Handle<i::Symbol>::cast(symbol)->set_name(*i_name);
+    i::JSObject::SetProperty(symbols, i_name, symbol, NONE, i::STRICT);
+  }
+  return Utils::ToLocal(i::Handle<i::Symbol>::cast(symbol));
+}
+
+
+Local<Private> v8::Private::New(Isolate* isolate, Local<String> name) {
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
   EnsureInitializedForIsolate(i_isolate, "v8::Private::New()");
   LOG_API(i_isolate, "Private::New()");
   ENTER_V8(i_isolate);
   i::Handle<i::Symbol> symbol = i_isolate->factory()->NewPrivateSymbol();
   if (!name.IsEmpty()) symbol->set_name(*Utils::OpenHandle(*name));
   Local<Symbol> result = Utils::ToLocal(symbol);
   return v8::Handle<Private>(reinterpret_cast<Private*>(*result));
 }
 
 
+Local<Private> v8::Private::ForApi(Isolate* isolate, Local<String> name) {
+  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  i::Handle<i::String> i_name = Utils::OpenHandle(*name);
+  i::Handle<i::JSObject> registry = i_isolate->GetSymbolRegistry();
+  i::Handle<i::String> part = i_isolate->factory()->private_api_string();
+  i::Handle<i::JSObject> privates =
+      i::Handle<i::JSObject>::cast(i::JSObject::GetProperty(registry, part));
+  i::Handle<i::Object> symbol = i::JSObject::GetProperty(privates, i_name);
+  if (!symbol->IsSymbol()) {
+    ASSERT(symbol->IsUndefined());
+    symbol = i_isolate->factory()->NewPrivateSymbol();
+    i::Handle<i::Symbol>::cast(symbol)->set_name(*i_name);
+    i::JSObject::SetProperty(privates, i_name, symbol, NONE, i::STRICT);
+  }
+  Local<Symbol> result = Utils::ToLocal(i::Handle<i::Symbol>::cast(symbol));
+  return v8::Handle<Private>(reinterpret_cast<Private*>(*result));
+}
+
+
 Local<Number> v8::Number::New(Isolate* isolate, double value) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
   ASSERT(internal_isolate->IsInitialized());
   if (std::isnan(value)) {
     // Introduce only canonical NaN value into the VM, to avoid signaling NaNs.
     value = i::OS::nan_value();
   }
   ENTER_V8(internal_isolate);
   i::Handle<i::Object> result = internal_isolate->factory()->NewNumber(value);
   return Utils::NumberToLocal(result);
@@ skipping 1419 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