1 /*
   2  * Copyright (c) 2001, 2019, 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
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  23  */
  24 
  25 #ifndef SHARE_GC_SHARED_CONCURRENTGCTHREAD_HPP
  26 #define SHARE_GC_SHARED_CONCURRENTGCTHREAD_HPP
  27 
  28 #include "runtime/thread.hpp"
  29 
  30 class ConcurrentGCThread: public NamedThread {
  31 private:
  32   volatile bool _should_terminate;
  33   volatile bool _has_terminated;
  34 
  35 protected:
  36   void create_and_start(ThreadPriority prio = NearMaxPriority);
  37 
  38   virtual void run_service() = 0;
  39   virtual void stop_service() = 0;
  40 
  41 public:
  42   ConcurrentGCThread();
  43 
  44   virtual bool is_ConcurrentGC_thread() const { return true; }
  45 
  46   virtual void run();
  47   virtual void stop();
  48 
  49   bool should_terminate();
  50   bool has_terminated();
  51 };
  52 
  53 #endif // SHARE_GC_SHARED_CONCURRENTGCTHREAD_HPP