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/*
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* Copyright 2000-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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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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