/*

 * Copyright (c) 2016, 2018, 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_JFR_RECORDER_CHECKPOINT_TYPES_JFRTHREADGROUP_HPP

#define SHARE_VM_JFR_RECORDER_CHECKPOINT_TYPES_JFRTHREADGROUP_HPP

#include "jni.h"

#include "jfr/utilities/jfrAllocation.hpp"

#include "jfr/utilities/jfrTypes.hpp"

class JfrCheckpointWriter;

template <typename>

class GrowableArray;

class JfrThreadGroupsHelper;

class JfrThreadGroupPointers;

class JfrThreadGroup : public JfrCHeapObj {

  friend class JfrCheckpointThreadClosure;

 private:

  static JfrThreadGroup* _instance;

  class JfrThreadGroupEntry;

  GrowableArray<JfrThreadGroupEntry*>* _list;

  JfrThreadGroup();

  JfrThreadGroupEntry* find_entry(const JfrThreadGroupPointers& ptrs) const;

  JfrThreadGroupEntry* new_entry(JfrThreadGroupPointers& ptrs);

  int add_entry(JfrThreadGroupEntry* const tge);

  void write_thread_group_entries(JfrCheckpointWriter& writer) const;

  void write_selective_thread_group(JfrCheckpointWriter* writer, traceid thread_group_id) const;

  static traceid thread_group_id_internal(JfrThreadGroupsHelper& helper);

  static JfrThreadGroup* instance();

  static void set_instance(JfrThreadGroup* new_instance);

 public:

  ~JfrThreadGroup();

  static void serialize(JfrCheckpointWriter& w);

  static void serialize(JfrCheckpointWriter* w, traceid thread_group_id);

  static traceid thread_group_id(JavaThread* thread);

  static traceid thread_group_id(const JavaThread* thread, Thread* current);

};

#endif // SHARE_VM_JFR_RECORDER_CHECKPOINT_TYPES_JFRTHREADGROUP_HPP