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 /*

  * 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

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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP

 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP

 #include "gc_implementation/g1/g1AllocationContext.hpp"

 #include "gc_implementation/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_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP