1 /*
   2  * Copyright (c) 1998, 2005, 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 inline intptr_t ObjectMonitor::is_entered(TRAPS) const {
  26   if (THREAD == _owner || THREAD->is_lock_owned((address) _owner)) {
  27     return 1;
  28   }
  29   return 0;
  30 }
  31 
  32 inline markOop ObjectMonitor::header() const {
  33   return _header;
  34 }
  35 
  36 inline void ObjectMonitor::set_header(markOop hdr) {
  37   _header = hdr;
  38 }
  39 
  40 inline intptr_t ObjectMonitor::count() const {
  41   return _count;
  42 }
  43 
  44 inline void ObjectMonitor::set_count(intptr_t count) {
  45   _count= count;
  46 }
  47 
  48 inline intptr_t ObjectMonitor::waiters() const {
  49   return _waiters;
  50 }
  51 
  52 inline void* ObjectMonitor::owner() const {
  53   return _owner;
  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, "Fatal logic error in ObjectMonitor object!");
  62   assert(_owner == 0, "Fatal logic error in ObjectMonitor owner!");
  63 
  64   _header = NULL;
  65   _object = NULL;
  66 }
  67 
  68 
  69 inline void* ObjectMonitor::object() const {
  70   return _object;
  71 }
  72 
  73 inline void* ObjectMonitor::object_addr() {
  74   return (void *)(&_object);
  75 }
  76 
  77 inline void ObjectMonitor::set_object(void* obj) {
  78   _object = obj;
  79 }
  80 
  81 inline bool ObjectMonitor::check(TRAPS) {
  82   if (THREAD != _owner) {
  83     if (THREAD->is_lock_owned((address) _owner)) {
  84       _owner = THREAD;  // regain ownership of inflated monitor
  85       OwnerIsThread = 1 ;
  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 intptr_t ObjectMonitor::contentions() const {
  98   return _count;
  99 }
 100 
 101 inline void ObjectMonitor::set_owner(void* owner) {
 102   _owner = owner;
 103   _recursions = 0;
 104   _count = 0;
 105 }
 106