1/*
2 * Copyright (c) 2017, 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
21 * questions.
22 *
23 */
24
25#ifndef SHARE_RUNTIME_THREADSMR_INLINE_HPP
26#define SHARE_RUNTIME_THREADSMR_INLINE_HPP
27
28#include "runtime/atomic.hpp"
29#include "runtime/prefetch.inline.hpp"
30#include "runtime/thread.inline.hpp"
31#include "runtime/threadSMR.hpp"
32
33// Devirtualize known thread closure types.
34template <class T>
35inline void ThreadsList::threads_do_dispatch(T *cl, JavaThread *const thread) const {
36 cl->T::do_thread(thread);
37}
38
39template <>
40inline void ThreadsList::threads_do_dispatch<ThreadClosure>(ThreadClosure *cl, JavaThread *const thread) const {
41 cl->do_thread(thread);
42}
43
44template <class T>
45inline void ThreadsList::threads_do(T *cl) const {
46 const intx scan_interval = PrefetchScanIntervalInBytes;
47 JavaThread *const *const end = _threads + _length;
48 for (JavaThread *const *current_p = _threads; current_p != end; current_p++) {
49 Prefetch::read((void*)current_p, scan_interval);
50 JavaThread *const current = *current_p;
51 threads_do_dispatch(cl, current);
52 }
53}
54
55// These three inlines are private to ThreadsSMRSupport, but
56// they are called by public inline update_tlh_stats() below:
57
58inline void ThreadsSMRSupport::add_tlh_times(uint add_value) {
59 Atomic::add(add_value, &_tlh_times);
60}
61
62inline void ThreadsSMRSupport::inc_tlh_cnt() {
63 Atomic::inc(&_tlh_cnt);
64}
65
66inline void ThreadsSMRSupport::update_tlh_time_max(uint new_value) {
67 while (true) {
68 uint cur_value = _tlh_time_max;
69 if (new_value <= cur_value) {
70 // No need to update max value so we're done.
71 break;
72 }
73 if (Atomic::cmpxchg(new_value, &_tlh_time_max, cur_value) == cur_value) {
74 // Updated max value so we're done. Otherwise try it all again.
75 break;
76 }
77 }
78}
79
80inline ThreadsList* ThreadsSMRSupport::get_java_thread_list() {
81 return (ThreadsList*)OrderAccess::load_acquire(&_java_thread_list);
82}
83
84inline bool ThreadsSMRSupport::is_a_protected_JavaThread_with_lock(JavaThread *thread) {
85 MutexLocker ml(Threads_lock->owned_by_self() ? NULL : Threads_lock);
86 return is_a_protected_JavaThread(thread);
87}
88
89inline void ThreadsSMRSupport::update_tlh_stats(uint millis) {
90 ThreadsSMRSupport::inc_tlh_cnt();
91 ThreadsSMRSupport::add_tlh_times(millis);
92 ThreadsSMRSupport::update_tlh_time_max(millis);
93}
94
95#endif // SHARE_RUNTIME_THREADSMR_INLINE_HPP
96