--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc/g1/vm_operations_g1.hpp	Wed May 13 15:16:06 2015 +0200
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2001, 2015, 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP
+#define SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP
+
+#include "gc/g1/g1AllocationContext.hpp"
+#include "gc/shared/vmGCOperations.hpp"
+
+// VM_operations for the G1 collector.
+// VM_GC_Operation:
+//   - VM_CGC_Operation
+//   - VM_G1CollectFull
+//   - VM_G1OperationWithAllocRequest
+//     - VM_G1CollectForAllocation
+//     - VM_G1IncCollectionPause
+
+class VM_G1OperationWithAllocRequest : public VM_CollectForAllocation {
+protected:
+  bool      _pause_succeeded;
+  AllocationContext_t _allocation_context;
+
+public:
+  VM_G1OperationWithAllocRequest(uint           gc_count_before,
+                                 size_t         word_size,
+                                 GCCause::Cause gc_cause)
+    : VM_CollectForAllocation(word_size, gc_count_before, gc_cause),
+      _pause_succeeded(false) {}
+  bool pause_succeeded() { return _pause_succeeded; }
+  void set_allocation_context(AllocationContext_t context) { _allocation_context = context; }
+  AllocationContext_t  allocation_context() { return _allocation_context; }
+};
+
+class VM_G1CollectFull: public VM_GC_Operation {
+public:
+  VM_G1CollectFull(uint gc_count_before,
+                   uint full_gc_count_before,
+                   GCCause::Cause cause)
+    : VM_GC_Operation(gc_count_before, cause, full_gc_count_before, true) { }
+  virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
+  virtual void doit();
+  virtual const char* name() const {
+    return "full garbage-first collection";
+  }
+};
+
+class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
+public:
+  VM_G1CollectForAllocation(uint         gc_count_before,
+                            size_t       word_size);
+  virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
+  virtual void doit();
+  virtual const char* name() const {
+    return "garbage-first collection to satisfy allocation";
+  }
+};
+
+class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
+private:
+  bool         _should_initiate_conc_mark;
+  bool         _should_retry_gc;
+  double       _target_pause_time_ms;
+  uint         _old_marking_cycles_completed_before;
+public:
+  VM_G1IncCollectionPause(uint           gc_count_before,
+                          size_t         word_size,
+                          bool           should_initiate_conc_mark,
+                          double         target_pause_time_ms,
+                          GCCause::Cause gc_cause);
+  virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
+  virtual bool doit_prologue();
+  virtual void doit();
+  virtual void doit_epilogue();
+  virtual const char* name() const {
+    return "garbage-first incremental collection pause";
+  }
+  bool should_retry_gc() const { return _should_retry_gc; }
+};
+
+// Concurrent GC stop-the-world operations such as remark and cleanup;
+// consider sharing these with CMS's counterparts.
+class VM_CGC_Operation: public VM_Operation {
+  VoidClosure* _cl;
+  const char* _printGCMessage;
+  bool _needs_pll;
+
+protected:
+  // java.lang.ref.Reference support
+  void acquire_pending_list_lock();
+  void release_and_notify_pending_list_lock();
+
+public:
+  VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)
+    : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }
+  virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
+  virtual void doit();
+  virtual bool doit_prologue();
+  virtual void doit_epilogue();
+  virtual const char* name() const {
+    return "concurrent gc";
+  }
+};
+
+#endif // SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP