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