src/share/vm/gc/g1/heapRegionManager.hpp

rev 11970 : imported patch heap_region_manager_volatiles

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -258,11 +258,11 @@
 // The HeapRegionClaimer is used during parallel iteration over heap regions,
 // allowing workers to claim heap regions, gaining exclusive rights to these regions.
 class HeapRegionClaimer : public StackObj {
   uint  _n_workers;
   uint  _n_regions;
-  uint* _claims;
+  volatile uint* _claims;
 
   static const uint Unclaimed = 0;
   static const uint Claimed   = 1;
 
  public:

@@ -282,6 +282,5 @@
 
   // Claim the given region, returns true if successfully claimed.
   bool claim_region(uint region_index);
 };
 #endif // SHARE_VM_GC_G1_HEAPREGIONMANAGER_HPP
-