1 /* 2 * Copyright (c) 1999, 2013, 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_VM_PRIMS_JVMTIRAWMONITOR_HPP 26 #define SHARE_VM_PRIMS_JVMTIRAWMONITOR_HPP 27 28 #include "runtime/objectMonitor.hpp" 29 #include "utilities/growableArray.hpp" 30 31 // 32 // class JvmtiRawMonitor 33 // 34 // Used by JVMTI methods: All RawMonitor methods (CreateRawMonitor, EnterRawMonitor, etc.) 35 // 36 // Wrapper for ObjectMonitor class that saves the Monitor's name 37 // 38 39 class JvmtiRawMonitor : public ObjectMonitor { 40 private: 41 int _magic; 42 char * _name; 43 // JVMTI_RM_MAGIC is set in contructor and unset in destructor. 44 enum { JVMTI_RM_MAGIC = (int)(('T' << 24) | ('I' << 16) | ('R' << 8) | 'M') }; 45 46 int SimpleEnter (Thread * Self) ; 47 int SimpleExit (Thread * Self) ; 48 int SimpleWait (Thread * Self, jlong millis) ; 49 int SimpleNotify (Thread * Self, bool All) ; 50 51 public: 52 JvmtiRawMonitor(const char *name); 53 ~JvmtiRawMonitor(); 54 int raw_enter(TRAPS); 55 int raw_exit(TRAPS); 56 int raw_wait(jlong millis, bool interruptable, TRAPS); 57 int raw_notify(TRAPS); 58 int raw_notifyAll(TRAPS); magic()59 int magic() { return _magic; } get_name()60 const char *get_name() { return _name; } 61 bool is_valid(); 62 }; 63 64 // Onload pending raw monitors 65 // Class is used to cache onload or onstart monitor enter 66 // which will transition into real monitor when 67 // VM is fully initialized. 68 class JvmtiPendingMonitors : public AllStatic { 69 70 private: 71 static GrowableArray<JvmtiRawMonitor*> *_monitors; // Cache raw monitor enter 72 monitors()73 inline static GrowableArray<JvmtiRawMonitor*>* monitors() { return _monitors; } 74 dispose()75 static void dispose() { 76 delete monitors(); 77 } 78 79 public: enter(JvmtiRawMonitor * monitor)80 static void enter(JvmtiRawMonitor *monitor) { 81 monitors()->append(monitor); 82 } 83 count()84 static int count() { 85 return monitors()->length(); 86 } 87 destroy(JvmtiRawMonitor * monitor)88 static void destroy(JvmtiRawMonitor *monitor) { 89 while (monitors()->contains(monitor)) { 90 monitors()->remove(monitor); 91 } 92 } 93 94 // Return false if monitor is not found in the list. exit(JvmtiRawMonitor * monitor)95 static bool exit(JvmtiRawMonitor *monitor) { 96 if (monitors()->contains(monitor)) { 97 monitors()->remove(monitor); 98 return true; 99 } else { 100 return false; 101 } 102 } 103 104 static void transition_raw_monitors(); 105 }; 106 107 #endif // SHARE_VM_PRIMS_JVMTIRAWMONITOR_HPP 108