/*

 * Copyright (c) 2011, 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_G1HRPRINTER_HPP

#define SHARE_VM_GC_G1_G1HRPRINTER_HPP

#include "gc/g1/heapRegion.hpp"

#include "memory/allocation.hpp"

#define SKIP_RETIRED_FULL_REGIONS 1

class G1HRPrinter VALUE_OBJ_CLASS_SPEC {

public:

  typedef enum {

    Alloc,

    AllocForce,

    Retire,

    Reuse,

    CSet,

    EvacFailure,

    Cleanup,

    PostCompaction,

    Commit,

    Uncommit

  } ActionType;

  typedef enum {

    Unset,

    Eden,

    Survivor,

    Old,

    SingleHumongous,

    StartsHumongous,

  } RegionType;

  typedef enum {

    StartGC,

    EndGC,

    StartFullGC,

    EndFullGC

  } PhaseType;

private:

  bool _active;

  static const char* action_name(ActionType action);

  static const char* region_type_name(RegionType type);

  static const char* phase_name(PhaseType phase);

  // Print an action event. This version is used in most scenarios and

  // only prints the region's bottom. The parameters type and top are

  // optional (the "not set" values are Unset and NULL).

  static void print(ActionType action, RegionType type,

                    HeapRegion* hr, HeapWord* top);

  // Print an action event. This version prints both the region's

  // bottom and end. Used for Commit / Uncommit events.

  static void print(ActionType action, HeapWord* bottom, HeapWord* end);

  // Print a phase event.

  static void print(PhaseType phase, size_t phase_num);

public:

  // In some places we iterate over a list in order to generate output

  // for the list's elements. By exposing this we can avoid this

  // iteration if the printer is not active.

  const bool is_active() { return _active; }

  // Have to set this explicitly as we have to do this during the

  // heap's initialize() method, not in the constructor.

  void set_active(bool active) { _active = active; }

  // The methods below are convenient wrappers for the print() methods.

  void alloc(HeapRegion* hr, RegionType type, bool force = false) {

    if (is_active()) {

      print((!force) ? Alloc : AllocForce, type, hr, NULL);

    }

  }

  void alloc(RegionType type, HeapRegion* hr, HeapWord* top) {

    if (is_active()) {

      print(Alloc, type, hr, top);

    }

  }

  void retire(HeapRegion* hr) {

    if (is_active()) {

      if (!SKIP_RETIRED_FULL_REGIONS || hr->top() < hr->end()) {

        print(Retire, Unset, hr, hr->top());

      }

    }

  }

  void reuse(HeapRegion* hr) {

    if (is_active()) {

      print(Reuse, Unset, hr, NULL);

    }

  }

  void cset(HeapRegion* hr) {

    if (is_active()) {

      print(CSet, Unset, hr, NULL);

    }

  }

  void evac_failure(HeapRegion* hr) {

    if (is_active()) {

      print(EvacFailure, Unset, hr, NULL);

    }

  }

  void cleanup(HeapRegion* hr) {

    if (is_active()) {

      print(Cleanup, Unset, hr, NULL);

    }

  }

  void post_compaction(HeapRegion* hr, RegionType type) {

    if (is_active()) {

      print(PostCompaction, type, hr, hr->top());

    }

  }

  void commit(HeapWord* bottom, HeapWord* end) {

    if (is_active()) {

      print(Commit, bottom, end);

    }

  }

  void uncommit(HeapWord* bottom, HeapWord* end) {

    if (is_active()) {

      print(Uncommit, bottom, end);

    }

  }

  void start_gc(bool full, size_t gc_num) {

    if (is_active()) {

      if (!full) {

        print(StartGC, gc_num);

      } else {

        print(StartFullGC, gc_num);

      }

    }

  }

  void end_gc(bool full, size_t gc_num) {

    if (is_active()) {

      if (!full) {

        print(EndGC, gc_num);

      } else {

        print(EndFullGC, gc_num);

      }

    }

  }

  G1HRPrinter() : _active(false) { }

};

#endif // SHARE_VM_GC_G1_G1HRPRINTER_HPP