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comparison src/share/vm/prims/jvmtiRawMonitor.hpp @ 1878:fa83ab460c54

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6988353: refactor contended sync subsystem Summary: reduce complexity by factoring synchronizer.cpp Reviewed-by: dholmes, never, coleenp
author acorn
date Fri, 22 Oct 2010 15:59:34 -0400
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children f95d63e2154a
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1874:75ab0162aa84 1878:fa83ab460c54
1 /*
2 * Copyright (c) 1999, 2007, 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 //
26 // class JvmtiRawMonitor
27 //
28 // Used by JVMTI methods: All RawMonitor methods (CreateRawMonitor, EnterRawMonitor, etc.)
29 //
30 // Wrapper for ObjectMonitor class that saves the Monitor's name
31 //
32
33 class JvmtiRawMonitor : public ObjectMonitor {
34 private:
35 int _magic;
36 char * _name;
37 // JVMTI_RM_MAGIC is set in contructor and unset in destructor.
38 enum { JVMTI_RM_MAGIC = (int)(('T' << 24) | ('I' << 16) | ('R' << 8) | 'M') };
39
40 int SimpleEnter (Thread * Self) ;
41 int SimpleExit (Thread * Self) ;
42 int SimpleWait (Thread * Self, jlong millis) ;
43 int SimpleNotify (Thread * Self, bool All) ;
44
45 public:
46 JvmtiRawMonitor(const char *name);
47 ~JvmtiRawMonitor();
48 int raw_enter(TRAPS);
49 int raw_exit(TRAPS);
50 int raw_wait(jlong millis, bool interruptable, TRAPS);
51 int raw_notify(TRAPS);
52 int raw_notifyAll(TRAPS);
53 int magic() { return _magic; }
54 const char *get_name() { return _name; }
55 bool is_valid();
56 };
57
58 // Onload pending raw monitors
59 // Class is used to cache onload or onstart monitor enter
60 // which will transition into real monitor when
61 // VM is fully initialized.
62 class JvmtiPendingMonitors : public AllStatic {
63
64 private:
65 static GrowableArray<JvmtiRawMonitor*> *_monitors; // Cache raw monitor enter
66
67 inline static GrowableArray<JvmtiRawMonitor*>* monitors() { return _monitors; }
68
69 static void dispose() {
70 delete monitors();
71 }
72
73 public:
74 static void enter(JvmtiRawMonitor *monitor) {
75 monitors()->append(monitor);
76 }
77
78 static int count() {
79 return monitors()->length();
80 }
81
82 static void destroy(JvmtiRawMonitor *monitor) {
83 while (monitors()->contains(monitor)) {
84 monitors()->remove(monitor);
85 }
86 }
87
88 // Return false if monitor is not found in the list.
89 static bool exit(JvmtiRawMonitor *monitor) {
90 if (monitors()->contains(monitor)) {
91 monitors()->remove(monitor);
92 return true;
93 } else {
94 return false;
95 }
96 }
97
98 static void transition_raw_monitors();
99 };