/*

 * Copyright (c) 2001, 2012, 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_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP

#define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_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_GC_Operation {

protected:

  size_t    _word_size;

  HeapWord* _result;

  bool      _pause_succeeded;

public:

  VM_G1OperationWithAllocRequest(unsigned int gc_count_before,

                                 size_t       word_size,

                                 GCCause::Cause gc_cause)

    : VM_GC_Operation(gc_count_before, gc_cause),

      _word_size(word_size), _result(NULL), _pause_succeeded(false) { }

  HeapWord* result() { return _result; }

  bool pause_succeeded() { return _pause_succeeded; }

};

class VM_G1CollectFull: public VM_GC_Operation {

public:

  VM_G1CollectFull(unsigned int gc_count_before,

                   unsigned int full_gc_count_before,

                   GCCause::Cause cause)

    : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { }

  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(unsigned int 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;

  unsigned int _old_marking_cycles_completed_before;

public:

  VM_G1IncCollectionPause(unsigned int   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