Provide a mechanism for the embedder to set a TotalPhysicalMemory callback function.

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 6418 matching lines @@
 }
 
 
 void V8::RemoveGCEpilogueCallback(GCEpilogueCallback callback) {
   i::Isolate* isolate = i::Isolate::Current();
   isolate->heap()->RemoveGCEpilogueCallback(
       reinterpret_cast<v8::Isolate::GCEpilogueCallback>(callback));
 }
 
 
+void V8::SetTotalPhysicalMemoryFunction(TotalPhysicalMemoryCallback callback) {
+  i::Isolate* isolate = i::Isolate::Current();

[Sven Panne, 2013/10/21 07:11:04]

o_O This is fundamentally wrong, and I can't see how we can ever remove
Current() here. Note that this is on death row already, and I will object any CL
which introduces further calls of it.

+  isolate->SetTotalPhysicalMemoryCallback(callback);
+}
+
+
 void V8::AddMemoryAllocationCallback(MemoryAllocationCallback callback,
                                      ObjectSpace space,
                                      AllocationAction action) {
   i::Isolate* isolate = i::Isolate::Current();
   isolate->memory_allocator()->AddMemoryAllocationCallback(
       callback, space, action);
 }
 
 
 void V8::RemoveMemoryAllocationCallback(MemoryAllocationCallback callback) {
@@ skipping 1095 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