aoqi@0: /*
aoqi@0:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_RUNTIME_SERVICETHREAD_HPP
aoqi@0: #define SHARE_VM_RUNTIME_SERVICETHREAD_HPP
aoqi@0: 
aoqi@0: #include "runtime/thread.hpp"
aoqi@0: 
aoqi@0: // A JavaThread for low memory detection support and JVMTI
aoqi@0: // compiled-method-load events.
aoqi@0: class ServiceThread : public JavaThread {
aoqi@0:   friend class VMStructs;
aoqi@0:  private:
aoqi@0: 
aoqi@0:   static ServiceThread* _instance;
aoqi@0: 
aoqi@0:   static void service_thread_entry(JavaThread* thread, TRAPS);
aoqi@0:   ServiceThread(ThreadFunction entry_point) : JavaThread(entry_point) {};
aoqi@0: 
aoqi@0:  public:
aoqi@0:   static void initialize();
aoqi@0: 
aoqi@0:   // Hide this thread from external view.
aoqi@0:   bool is_hidden_from_external_view() const      { return true; }
aoqi@0: 
aoqi@0:   // Returns true if the passed thread is the service thread.
aoqi@0:   static bool is_service_thread(Thread* thread);
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // SHARE_VM_RUNTIME_SERVICETHREAD_HPP