hotspot/src/share/vm/memory/gcLocker.inline.hpp
author tonyp
Tue, 08 Nov 2011 00:41:28 -0500
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7099849: G1: include heap region information in hs_err files Reviewed-by: johnc, brutisso, poonam
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/*
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 * Copyright (c) 2000, 2010, 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_MEMORY_GCLOCKER_INLINE_HPP
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#define SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP
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#include "memory/gcLocker.hpp"
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inline bool GC_locker::is_active() {
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  return _lock_count > 0 || _jni_lock_count > 0;
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}
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inline bool GC_locker::check_active_before_gc() {
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  if (is_active()) {
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    set_needs_gc();
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  }
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  return is_active();
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}
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inline void GC_locker::lock() {
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  // cast away volatile
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  Atomic::inc(&_lock_count);
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  CHECK_UNHANDLED_OOPS_ONLY(
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    if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count++; })
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  assert(Universe::heap() == NULL ||
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         !Universe::heap()->is_gc_active(), "locking failed");
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}
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inline void GC_locker::unlock() {
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  // cast away volatile
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  Atomic::dec(&_lock_count);
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  CHECK_UNHANDLED_OOPS_ONLY(
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    if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count--; })
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}
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inline void GC_locker::lock_critical(JavaThread* thread) {
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  if (!thread->in_critical()) {
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    if (!needs_gc()) {
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      jni_lock();
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    } else {
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      jni_lock_slow();
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    }
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  }
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  thread->enter_critical();
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}
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inline void GC_locker::unlock_critical(JavaThread* thread) {
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  thread->exit_critical();
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  if (!thread->in_critical()) {
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    if (!needs_gc()) {
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      jni_unlock();
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    } else {
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      jni_unlock_slow();
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    }
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  }
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}
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#endif // SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP