Inline the StackResource constructor/destructor.

vm/base_isolate.h

Index: vm/base_isolate.h
===================================================================
--- vm/base_isolate.h	(revision 0)
+++ vm/base_isolate.h	(revision 0)
@@ -0,0 +1,41 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef VM_BASE_ISOLATE_H_
+#define VM_BASE_ISOLATE_H_
+
+namespace dart {
+
+class HandleScope;
+class StackResource;
+class Zone;
+
+// A BaseIsolate contains just enough functionality to allocate
+// StackResources.  This allows us to inline the StackResource
+// constructor/destructor for performance.
+class BaseIsolate {
+ public:
+  StackResource* top_resource() const { return top_resource_; }
+  void set_top_resource(StackResource* value) { top_resource_ = value; }
+
+  Zone* current_zone() const { return current_zone_; }
+  void set_current_zone(Zone* zone) { current_zone_ = zone; }
+
+#if defined(DEBUG)
+  static void AssertCurrent(BaseIsolate* isolate);
+#endif
+
+ protected:
+  BaseIsolate() : top_resource_(NULL), current_zone_(NULL) {}
+  ~BaseIsolate() {
+    // Do not delete stack resources: top_resource_ and current_zone_.
+  }
+
+  StackResource* top_resource_;
+  Zone* current_zone_;

[siva, 2012/04/06 17:30:14]

DISALLOW_COPY_AND_ASSIGN(BaseIsolate);

[turnidge, 2012/04/06 17:50:40]

Done.

+};
+
+}  // namespace dart
+
+#endif  // VM_BASE_ISOLATE_H_