[Isolates] Move contents of Top into Isolate....

src/handles-inl.h

 // Copyright 2006-2008 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 11 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 V8_HANDLES_INL_H_
 #define V8_HANDLES_INL_H_
 
+#include "api.h"
 #include "apiutils.h"
 #include "handles.h"
-#include "api.h"
+#include "isolate.h"
 
 namespace v8 {
 namespace internal {
 
 template<class T>
 Handle<T>::Handle(T* obj) {
   ASSERT(!obj->IsFailure());
   location_ = HandleScope::CreateHandle(obj);
 }
 
 
 template <class T>
 inline T* Handle<T>::operator*() const {
   ASSERT(location_ != NULL);
   ASSERT(reinterpret_cast<Address>(*location_) != kHandleZapValue);
   return *location_;
 }
 
 
+HandleScope::HandleScope()
+    : previous_(*Isolate::Current()->handle_scope_data()) {
+  Isolate::Current()->handle_scope_data()->extensions = 0;
+}
+
+
+template <typename T>
+T** HandleScope::CreateHandle(T* value) {
+  v8::ImplementationUtilities::HandleScopeData* current =
+      Isolate::Current()->handle_scope_data();
+
+  internal::Object** cur = current->next;
+  if (cur == current->limit) cur = Extend();
+  // Update the current next field, set the value in the created
+  // handle, and return the result.
+  ASSERT(cur < current->limit);
+  current->next = cur + 1;
+
+  T** result = reinterpret_cast<T**>(cur);
+  *result = value;
+  return result;
+}
+
+
+void HandleScope::Enter(
+    v8::ImplementationUtilities::HandleScopeData* previous) {
+  v8::ImplementationUtilities::HandleScopeData* current =
+      Isolate::Current()->handle_scope_data();
+  *previous = *current;
+  current->extensions = 0;
+}
+
+
+void HandleScope::Leave(
+    const v8::ImplementationUtilities::HandleScopeData* previous) {
+  Isolate* isolate = Isolate::Current();
+  v8::ImplementationUtilities::HandleScopeData* current =
+      isolate->handle_scope_data();
+  if (current->extensions > 0) {
+    DeleteExtensions(isolate);
+  }
+  *current = *previous;
+#ifdef DEBUG
+  ZapRange(current->next, current->limit);
+#endif
+}
+
+
 #ifdef DEBUG
 inline NoHandleAllocation::NoHandleAllocation() {
   v8::ImplementationUtilities::HandleScopeData* current =
       Isolate::Current()->handle_scope_data();
   extensions_ = current->extensions;
   // Shrink the current handle scope to make it impossible to do
   // handle allocations without an explicit handle scope.
   current->limit = current->next;
   current->extensions = -1;
 }
 
 
 inline NoHandleAllocation::~NoHandleAllocation() {
   // Restore state in current handle scope to re-enable handle
   // allocations.
   Isolate::Current()->handle_scope_data()->extensions = extensions_;
 }
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HANDLES_INL_H_