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

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2017, 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.

@@ -26,10 +26,11 @@
 #define SHARE_VM_GC_G1_HEAPREGIONMANAGER_HPP
 
 #include "gc/g1/g1BiasedArray.hpp"
 #include "gc/g1/g1RegionToSpaceMapper.hpp"
 #include "gc/g1/heapRegionSet.hpp"
+#include "gc/shared/workgroup.hpp"
 #include "services/memoryUsage.hpp"
 
 class HeapRegion;
 class HeapRegionClosure;
 class HeapRegionClaimer;

@@ -282,6 +283,21 @@
   bool is_region_claimed(uint region_index) const;
 
   // Claim the given region, returns true if successfully claimed.
   bool claim_region(uint region_index);
 };
+
+// Subclass of AbstractGangTask that uses a HeapRegionClaimer to parallelize work on a region basis
+class G1ParallelizeByRegionsTask: public AbstractGangTask {
+  HeapRegionClaimer _hrclaimer;
+
+public:
+  G1ParallelizeByRegionsTask(const char* name, uint num_workers) :
+    AbstractGangTask(name),
+    _hrclaimer(num_workers) {}
+
+protected:
+  void all_heap_regions_work(HeapRegionClosure* cl,
+                             uint worker_id,
+                             bool concurrent = false);
+};
 #endif // SHARE_VM_GC_G1_HEAPREGIONMANAGER_HPP