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 return _owner; 53 } 54 55 inline void ObjectMonitor::clear() { 56 assert(_header, "Fatal logic error in ObjectMonitor header!"); 57 assert(_count == 0, "Fatal logic error in ObjectMonitor count!"); 58 assert(_waiters == 0, "Fatal logic error in ObjectMonitor waiters!"); 59 assert(_recursions == 0, "Fatal logic error in ObjectMonitor recursions!"); 60 assert(_object != NULL, "Fatal logic error in ObjectMonitor object!"); 61 assert(_owner == 0, "Fatal logic error in ObjectMonitor owner!"); 62 63 _header = NULL; 64 _object = NULL; 65 } 66 67 68 inline void* ObjectMonitor::object() const { 69 /* 70 if (_object != (cast_to_oop<intptr_t>(-1))) { 71 assert(oop(_object) == oopDesc::bs()->resolve_and_maybe_copy_oop(oop(_object)), "expect to-space copy"); 72 } 73 */ 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 if (_object != (cast_to_oop<intptr_t>(-1))) { 84 assert(oop(_object) == oopDesc::bs()->resolve_and_maybe_copy_oop(oop(_object)), "expect to-space copy"); 85 } 86 } 87 88 inline bool ObjectMonitor::check(TRAPS) { 89 if (THREAD != _owner) { 90 if (THREAD->is_lock_owned((address) _owner)) { 91 _owner = THREAD; // regain ownership of inflated monitor 92 assert (_recursions == 0, "invariant") ; 93 } else { 94 check_slow(THREAD); 95 return false; 96 } 97 } 98 return true; 99 } 100 101 102 // return number of threads contending for this monitor 103 inline jint ObjectMonitor::contentions() const { 104 return _count; 105 } 106 107 // Do NOT set _count = 0. There is a race such that _count could 108 // be set while inflating prior to setting _owner 109 // Just use Atomic::inc/dec and assert 0 when monitor put on free list 110 inline void ObjectMonitor::set_owner(void* owner) { 111 _owner = owner; 112 _recursions = 0; 113 } 114 115 116 #endif // SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP