1/*
2 * Copyright (c) 2015, 2017, 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#ifndef SHARE_GC_Z_ZTHREAD_HPP
25#define SHARE_GC_Z_ZTHREAD_HPP
26
27#include "memory/allocation.hpp"
28#include "utilities/debug.hpp"
29
30class ZThread : public AllStatic {
31 friend class ZTask;
32 friend class ZWorkersInitializeTask;
33 friend class ZRuntimeWorkersInitializeTask;
34
35private:
36 static __thread bool _initialized;
37 static __thread uintptr_t _id;
38 static __thread bool _is_vm;
39 static __thread bool _is_java;
40 static __thread bool _is_worker;
41 static __thread bool _is_runtime_worker;
42 static __thread uint _worker_id;
43
44 static void initialize();
45
46 static void ensure_initialized() {
47 if (!_initialized) {
48 initialize();
49 }
50 }
51
52 static void set_worker();
53 static void set_runtime_worker();
54
55 static bool has_worker_id();
56 static void set_worker_id(uint worker_id);
57 static void clear_worker_id();
58
59public:
60 static const char* name();
61
62 static uintptr_t id() {
63 ensure_initialized();
64 return _id;
65 }
66
67 static bool is_vm() {
68 ensure_initialized();
69 return _is_vm;
70 }
71
72 static bool is_java() {
73 ensure_initialized();
74 return _is_java;
75 }
76
77 static bool is_worker() {
78 ensure_initialized();
79 return _is_worker;
80 }
81
82 static bool is_runtime_worker() {
83 ensure_initialized();
84 return _is_runtime_worker;
85 }
86
87 static uint worker_id() {
88 assert(has_worker_id(), "Worker id not initialized");
89 return _worker_id;
90 }
91};
92
93#endif // SHARE_GC_Z_ZTHREAD_HPP
94