src/hotspot/share/runtime/objectMonitor.inline.hpp
author erikj
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/*
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 * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP
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#define SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP
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inline intptr_t ObjectMonitor::is_entered(TRAPS) const {
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  if (THREAD == _owner || THREAD->is_lock_owned((address) _owner)) {
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    return 1;
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  }
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  return 0;
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}
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inline markOop ObjectMonitor::header() const {
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  return _header;
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}
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inline void ObjectMonitor::set_header(markOop hdr) {
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  _header = hdr;
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}
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inline jint ObjectMonitor::count() const {
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  return _count;
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}
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inline jint ObjectMonitor::waiters() const {
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  return _waiters;
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}
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inline void* ObjectMonitor::owner() const {
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  return _owner;
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}
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inline void ObjectMonitor::clear() {
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  assert(_header, "Fatal logic error in ObjectMonitor header!");
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  assert(_count == 0, "Fatal logic error in ObjectMonitor count!");
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  assert(_waiters == 0, "Fatal logic error in ObjectMonitor waiters!");
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  assert(_recursions == 0, "Fatal logic error in ObjectMonitor recursions!");
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  assert(_object != NULL, "Fatal logic error in ObjectMonitor object!");
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  assert(_owner == 0, "Fatal logic error in ObjectMonitor owner!");
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  _header = NULL;
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  _object = NULL;
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}
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inline void* ObjectMonitor::object() const {
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  return _object;
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}
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inline void* ObjectMonitor::object_addr() {
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  return (void *)(&_object);
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}
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inline void ObjectMonitor::set_object(void* obj) {
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  _object = obj;
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}
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inline bool ObjectMonitor::check(TRAPS) {
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  if (THREAD != _owner) {
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    if (THREAD->is_lock_owned((address) _owner)) {
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      _owner = THREAD;  // regain ownership of inflated monitor
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      assert (_recursions == 0, "invariant") ;
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    } else {
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      check_slow(THREAD);
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      return false;
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    }
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  }
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  return true;
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}
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// return number of threads contending for this monitor
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inline jint ObjectMonitor::contentions() const {
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  return _count;
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}
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// Do NOT set _count = 0. There is a race such that _count could
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// be set while inflating prior to setting _owner
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// Just use Atomic::inc/dec and assert 0 when monitor put on free list
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inline void ObjectMonitor::set_owner(void* owner) {
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  _owner = owner;
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  _recursions = 0;
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}
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#endif // SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP