1 /* 2 * Copyright (c) 1999, 2010, 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 #ifndef JVMTI_KERNEL 29 #include "runtime/objectMonitor.hpp" 30 #include "utilities/growableArray.hpp" 31 #endif 32 33 // 34 // class JvmtiRawMonitor 35 // 36 // Used by JVMTI methods: All RawMonitor methods (CreateRawMonitor, EnterRawMonitor, etc.) 37 // 38 // Wrapper for ObjectMonitor class that saves the Monitor's name 39 // 40 41 class JvmtiRawMonitor : public ObjectMonitor { 42 private: 43 int _magic; 44 char * _name; 45 // JVMTI_RM_MAGIC is set in contructor and unset in destructor. 46 enum { JVMTI_RM_MAGIC = (int)(('T' << 24) | ('I' << 16) | ('R' << 8) | 'M') }; 47 48 int SimpleEnter (Thread * Self) ; 49 int SimpleExit (Thread * Self) ; 50 int SimpleWait (Thread * Self, jlong millis) ; 51 int SimpleNotify (Thread * Self, bool All) ; 52 53 public: 54 JvmtiRawMonitor(const char *name); 55 ~JvmtiRawMonitor(); 56 int raw_enter(TRAPS); 57 int raw_exit(TRAPS); 58 int raw_wait(jlong millis, bool interruptable, TRAPS); 59 int raw_notify(TRAPS); 60 int raw_notifyAll(TRAPS); 61 int magic() { return _magic; } 62 const char *get_name() { return _name; } 63 bool is_valid(); 64 }; 65 66 // Onload pending raw monitors 67 // Class is used to cache onload or onstart monitor enter 68 // which will transition into real monitor when 69 // VM is fully initialized. 70 class JvmtiPendingMonitors : public AllStatic { 71 72 private: 73 static GrowableArray<JvmtiRawMonitor*> *_monitors; // Cache raw monitor enter 74 75 inline static GrowableArray<JvmtiRawMonitor*>* monitors() { return _monitors; } 76 77 static void dispose() { 78 delete monitors(); 79 } 80 81 public: 82 static void enter(JvmtiRawMonitor *monitor) { 83 monitors()->append(monitor); 84 } 85 86 static int count() { 87 return monitors()->length(); 88 } 89 90 static void destroy(JvmtiRawMonitor *monitor) { 91 while (monitors()->contains(monitor)) { 92 monitors()->remove(monitor); 93 } 94 } 95 96 // Return false if monitor is not found in the list. 97 static bool exit(JvmtiRawMonitor *monitor) { 98 if (monitors()->contains(monitor)) { 99 monitors()->remove(monitor); 100 return true; 101 } else { 102 return false; 103 } 104 } 105 106 static void transition_raw_monitors(); 107 }; 108 109 #endif // SHARE_VM_PRIMS_JVMTIRAWMONITOR_HPP