Profiler Take 2

runtime/vm/atomic.h

Index: runtime/vm/atomic.h
diff --git a/runtime/vm/random.h b/runtime/vm/atomic.h
similarity index 50%
copy from runtime/vm/random.h
copy to runtime/vm/atomic.h
index c1c69d63efed579195a8314f3126327415c2526f..64defc02007a5c3eb1d4e8de08c14e236fc4c6e2 100644
--- a/runtime/vm/random.h
+++ b/runtime/vm/atomic.h
@@ -2,30 +2,21 @@
 // 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_RANDOM_H_
-#define VM_RANDOM_H_
+#ifndef VM_ATOMIC_H_
+#define VM_ATOMIC_H_
 
-#include "vm/globals.h"
 #include "vm/allocation.h"
 
 namespace dart {
 
-class Random : public ValueObject {
+class AtomicOperations : public AllStatic {
  public:
-  Random();
-  ~Random();
-
-  uint32_t NextUInt32();
-
- private:
-  void NextState();
-
-  uint64_t _state;
-
-  DISALLOW_ALLOCATION();
-  DISALLOW_COPY_AND_ASSIGN(Random);
+  // Atomically fetch the value at p and increment the value at p.
+  // Returns the original value at p.
+  static uintptr_t FetchAndIncrement(uintptr_t* p);
 };
 
+
 }  // namespace dart
 
-#endif  // VM_RANDOM_H_
+#endif  // VM_ATOMIC_H_