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1878
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1 /*
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1972
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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1878
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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1972
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25 #ifndef SHARE_VM_PRIMS_JVMTIRAWMONITOR_HPP
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26 #define SHARE_VM_PRIMS_JVMTIRAWMONITOR_HPP
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27
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28 #ifndef JVMTI_KERNEL
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29 #include "runtime/objectMonitor.hpp"
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30 #include "utilities/growableArray.hpp"
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31 #endif
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32
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1878
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33 //
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34 // class JvmtiRawMonitor
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35 //
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36 // Used by JVMTI methods: All RawMonitor methods (CreateRawMonitor, EnterRawMonitor, etc.)
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37 //
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38 // Wrapper for ObjectMonitor class that saves the Monitor's name
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39 //
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40
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41 class JvmtiRawMonitor : public ObjectMonitor {
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42 private:
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43 int _magic;
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44 char * _name;
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45 // JVMTI_RM_MAGIC is set in contructor and unset in destructor.
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46 enum { JVMTI_RM_MAGIC = (int)(('T' << 24) | ('I' << 16) | ('R' << 8) | 'M') };
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47
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48 int SimpleEnter (Thread * Self) ;
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49 int SimpleExit (Thread * Self) ;
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50 int SimpleWait (Thread * Self, jlong millis) ;
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51 int SimpleNotify (Thread * Self, bool All) ;
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52
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53 public:
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54 JvmtiRawMonitor(const char *name);
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55 ~JvmtiRawMonitor();
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56 int raw_enter(TRAPS);
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57 int raw_exit(TRAPS);
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58 int raw_wait(jlong millis, bool interruptable, TRAPS);
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59 int raw_notify(TRAPS);
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60 int raw_notifyAll(TRAPS);
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61 int magic() { return _magic; }
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62 const char *get_name() { return _name; }
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63 bool is_valid();
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64 };
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65
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66 // Onload pending raw monitors
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67 // Class is used to cache onload or onstart monitor enter
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68 // which will transition into real monitor when
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69 // VM is fully initialized.
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70 class JvmtiPendingMonitors : public AllStatic {
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71
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72 private:
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73 static GrowableArray<JvmtiRawMonitor*> *_monitors; // Cache raw monitor enter
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74
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75 inline static GrowableArray<JvmtiRawMonitor*>* monitors() { return _monitors; }
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76
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77 static void dispose() {
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78 delete monitors();
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79 }
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80
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81 public:
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82 static void enter(JvmtiRawMonitor *monitor) {
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83 monitors()->append(monitor);
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84 }
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85
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86 static int count() {
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87 return monitors()->length();
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88 }
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89
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90 static void destroy(JvmtiRawMonitor *monitor) {
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91 while (monitors()->contains(monitor)) {
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92 monitors()->remove(monitor);
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93 }
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94 }
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95
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96 // Return false if monitor is not found in the list.
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97 static bool exit(JvmtiRawMonitor *monitor) {
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98 if (monitors()->contains(monitor)) {
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99 monitors()->remove(monitor);
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100 return true;
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101 } else {
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102 return false;
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103 }
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104 }
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105
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106 static void transition_raw_monitors();
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107 };
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1972
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108
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109 #endif // SHARE_VM_PRIMS_JVMTIRAWMONITOR_HPP
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