/*

 * Copyright (c) 2011, 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_RUNTIME_SERVICETHREAD_HPP

#define SHARE_VM_RUNTIME_SERVICETHREAD_HPP

#include "runtime/thread.hpp"

// A JavaThread for low memory detection support and JVMTI

// compiled-method-load events.

class ServiceThread : public JavaThread {

  friend class VMStructs;

 private:

  static ServiceThread* _instance;

  static void service_thread_entry(JavaThread* thread, TRAPS);

  ServiceThread(ThreadFunction entry_point) : JavaThread(entry_point) {};

 public:

  static void initialize();

  // Hide this thread from external view.

  bool is_hidden_from_external_view() const      { return true; }

  // Returns true if the passed thread is the service thread.

  static bool is_service_thread(Thread* thread);

};

#endif // SHARE_VM_RUNTIME_SERVICETHREAD_HPP