1/*
2 * Copyright (c) 2011, 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_RUNTIME_SERVICETHREAD_HPP
26#define SHARE_RUNTIME_SERVICETHREAD_HPP
27
28#include "runtime/thread.hpp"
29
30// A JavaThread for low memory detection support and JVMTI
31// compiled-method-load events.
32class ServiceThread : public JavaThread {
33 friend class VMStructs;
34 private:
35
36 static ServiceThread* _instance;
37
38 static void service_thread_entry(JavaThread* thread, TRAPS);
39 ServiceThread(ThreadFunction entry_point) : JavaThread(entry_point) {};
40
41 public:
42 static void initialize();
43
44 // Hide this thread from external view.
45 bool is_hidden_from_external_view() const { return true; }
46
47 // Returns true if the passed thread is the service thread.
48 static bool is_service_thread(Thread* thread);
49};
50
51#endif // SHARE_RUNTIME_SERVICETHREAD_HPP
52