/*

 * Copyright (c) 2012, 2013, 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

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 */

#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GCHEAPSUMMARY_HPP

#define SHARE_VM_GC_IMPLEMENTATION_SHARED_GCHEAPSUMMARY_HPP

#include "memory/allocation.hpp"

class VirtualSpaceSummary : public StackObj {

  HeapWord* _start;

  HeapWord* _committed_end;

  HeapWord* _reserved_end;

public:

  VirtualSpaceSummary() :

      _start(NULL), _committed_end(NULL), _reserved_end(NULL) { }

  VirtualSpaceSummary(HeapWord* start, HeapWord* committed_end, HeapWord* reserved_end) :

      _start(start), _committed_end(committed_end), _reserved_end(reserved_end) { }

  HeapWord* start() const { return _start; }

  HeapWord* committed_end() const { return _committed_end; }

  HeapWord* reserved_end() const { return _reserved_end; }

  size_t committed_size() const { return (uintptr_t)_committed_end - (uintptr_t)_start;  }

  size_t reserved_size() const { return (uintptr_t)_reserved_end - (uintptr_t)_start; }

};

class SpaceSummary : public StackObj {

  HeapWord* _start;

  HeapWord* _end;

  size_t    _used;

public:

  SpaceSummary() :

      _start(NULL), _end(NULL), _used(0) { }

  SpaceSummary(HeapWord* start, HeapWord* end, size_t used) :

      _start(start), _end(end), _used(used) { }

  HeapWord* start() const { return _start; }

  HeapWord* end() const { return _end; }

  size_t used() const { return _used; }

  size_t size() const { return (uintptr_t)_end - (uintptr_t)_start; }

};

class MetaspaceSizes : public StackObj {

  size_t _capacity;

  size_t _used;

  size_t _reserved;

 public:

  MetaspaceSizes() : _capacity(0), _used(0), _reserved(0) {}

  MetaspaceSizes(size_t capacity, size_t used, size_t reserved) :

    _capacity(capacity), _used(used), _reserved(reserved) {}

  size_t capacity() const { return _capacity; }

  size_t used() const { return _used; }

  size_t reserved() const { return _reserved; }

};

class GCHeapSummary;

class PSHeapSummary;

class GCHeapSummaryVisitor {

 public:

  virtual void visit(const GCHeapSummary* heap_summary) const = 0;

  virtual void visit(const PSHeapSummary* heap_summary) const {}

};

class GCHeapSummary : public StackObj {

  VirtualSpaceSummary _heap;

  size_t _used;

 public:

   GCHeapSummary() :

       _heap(), _used(0) { }

   GCHeapSummary(VirtualSpaceSummary& heap_space, size_t used) :

       _heap(heap_space), _used(used) { }

  const VirtualSpaceSummary& heap() const { return _heap; }

  size_t used() const { return _used; }

   virtual void accept(GCHeapSummaryVisitor* visitor) const {

     visitor->visit(this);

   }

};

class PSHeapSummary : public GCHeapSummary {

  VirtualSpaceSummary  _old;

  SpaceSummary         _old_space;

  VirtualSpaceSummary  _young;

  SpaceSummary         _eden;

  SpaceSummary         _from;

  SpaceSummary         _to;

 public:

   PSHeapSummary(VirtualSpaceSummary& heap_space, size_t heap_used, VirtualSpaceSummary old, SpaceSummary old_space, VirtualSpaceSummary young, SpaceSummary eden, SpaceSummary from, SpaceSummary to) :

       GCHeapSummary(heap_space, heap_used), _old(old), _old_space(old_space), _young(young), _eden(eden), _from(from), _to(to) { }

   const VirtualSpaceSummary& old() const { return _old; }

   const SpaceSummary& old_space() const { return _old_space; }

   const VirtualSpaceSummary& young() const { return _young; }

   const SpaceSummary& eden() const { return _eden; }

   const SpaceSummary& from() const { return _from; }

   const SpaceSummary& to() const { return _to; }

   virtual void accept(GCHeapSummaryVisitor* visitor) const {

     visitor->visit(this);

   }

};

class MetaspaceSummary : public StackObj {

  size_t _capacity_until_GC;

  MetaspaceSizes _meta_space;

  MetaspaceSizes _data_space;

  MetaspaceSizes _class_space;

 public:

  size_t capacity_until_GC() const { return _capacity_until_GC; }

  const MetaspaceSizes& meta_space() const { return _meta_space; }

  const MetaspaceSizes& data_space() const { return _data_space; }

  const MetaspaceSizes& class_space() const { return _class_space; }

};

#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GCHEAPSUMMARY_HPP