1 /*
   2  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_JFR_RECORDER_CHECKPOINT_TYPES_JFRTHREADGROUP_HPP
  26 #define SHARE_VM_JFR_RECORDER_CHECKPOINT_TYPES_JFRTHREADGROUP_HPP
  27 
  28 #include "jni.h"
  29 #include "jfr/utilities/jfrAllocation.hpp"
  30 #include "jfr/utilities/jfrTypes.hpp"
  31 
  32 class JfrCheckpointWriter;
  33 template <typename>
  34 class GrowableArray;
  35 class JfrThreadGroupsHelper;
  36 class JfrThreadGroupPointers;
  37 
  38 class JfrThreadGroup : public JfrCHeapObj {
  39   friend class JfrCheckpointThreadClosure;
  40  private:
  41   static JfrThreadGroup* _instance;
  42   class JfrThreadGroupEntry;
  43   GrowableArray<JfrThreadGroupEntry*>* _list;
  44 
  45   JfrThreadGroup();
  46   JfrThreadGroupEntry* find_entry(const JfrThreadGroupPointers& ptrs) const;
  47   JfrThreadGroupEntry* new_entry(JfrThreadGroupPointers& ptrs);
  48   int add_entry(JfrThreadGroupEntry* const tge);
  49 
  50   void write_thread_group_entries(JfrCheckpointWriter& writer) const;
  51   void write_selective_thread_group(JfrCheckpointWriter* writer, traceid thread_group_id) const;
  52 
  53   static traceid thread_group_id_internal(JfrThreadGroupsHelper& helper);
  54   static JfrThreadGroup* instance();
  55   static void set_instance(JfrThreadGroup* new_instance);
  56 
  57  public:
  58   ~JfrThreadGroup();
  59   static void serialize(JfrCheckpointWriter& w);
  60   static void serialize(JfrCheckpointWriter* w, traceid thread_group_id);
  61   static traceid thread_group_id(JavaThread* thread);
  62   static traceid thread_group_id(const JavaThread* thread, Thread* current);
  63 };
  64 
  65 #endif // SHARE_VM_JFR_RECORDER_CHECKPOINT_TYPES_JFRTHREADGROUP_HPP