1 /* 2 * Copyright (c) 1998, 2014, 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_RUNTIME_OBJECTMONITOR_INLINE_HPP 26 #define SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP 27 28 inline intptr_t ObjectMonitor::is_entered(TRAPS) const { 29 if (THREAD == _owner || THREAD->is_lock_owned((address) _owner)) { 30 return 1; 31 } 32 return 0; 33 } 34 35 inline markOop ObjectMonitor::header() const { 36 return _header; 37 } 38 39 inline volatile markOop* ObjectMonitor::header_addr() { 40 assert((intptr_t)this == (intptr_t)&_header, "sync code expects this"); 41 return &_header; 42 } 43 44 inline void ObjectMonitor::set_header(markOop hdr) { 45 _header = hdr; 46 } 47 48 inline jint ObjectMonitor::count() const { 49 return _count; 50 } 51 52 inline jint ObjectMonitor::waiters() const { 53 return _waiters; 54 } 55 56 inline void* ObjectMonitor::owner() const { 57 return _owner; 58 } 59 60 inline void ObjectMonitor::clear() { 61 assert(_header, "Fatal logic error in ObjectMonitor header!"); 62 assert(_count == 0, "Fatal logic error in ObjectMonitor count!"); 63 assert(_waiters == 0, "Fatal logic error in ObjectMonitor waiters!"); 64 assert(_recursions == 0, "Fatal logic error in ObjectMonitor recursions!"); 65 assert(_object != NULL, "Fatal logic error in ObjectMonitor object!"); 66 assert(_owner == 0, "Fatal logic error in ObjectMonitor owner!"); 67 68 _header = NULL; 69 _object = NULL; 70 } 71 72 73 inline void* ObjectMonitor::object() const { 74 return _object; 75 } 76 77 inline void* ObjectMonitor::object_addr() { 78 return (void *)(&_object); 79 } 80 81 inline void ObjectMonitor::set_object(void* obj) { 82 _object = obj; 83 } 84 85 inline bool ObjectMonitor::check(TRAPS) { 86 if (THREAD != _owner) { 87 if (THREAD->is_lock_owned((address) _owner)) { 88 _owner = THREAD; // regain ownership of inflated monitor 89 assert (_recursions == 0, "invariant") ; 90 } else { 91 check_slow(THREAD); 92 return false; 93 } 94 } 95 return true; 96 } 97 98 99 // return number of threads contending for this monitor 100 inline jint ObjectMonitor::contentions() const { 101 return _count; 102 } 103 104 // Do NOT set _count = 0. There is a race such that _count could 105 // be set while inflating prior to setting _owner 106 // Just use Atomic::inc/dec and assert 0 when monitor put on free list 107 inline void ObjectMonitor::set_owner(void* owner) { 108 _owner = owner; 109 _recursions = 0; 110 } 111 112 113 #endif // SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP