Mercurial > hg > truffle
diff src/share/vm/memory/gcLocker.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/memory/gcLocker.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,72 @@ +/* + * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +inline bool GC_locker::is_active() { + return _lock_count > 0 || _jni_lock_count > 0; +} + +inline bool GC_locker::check_active_before_gc() { + if (is_active()) { + set_needs_gc(); + } + return is_active(); +} + +inline void GC_locker::lock() { + // cast away volatile + Atomic::inc(&_lock_count); + CHECK_UNHANDLED_OOPS_ONLY( + if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count++; }) + assert(Universe::heap() == NULL || + !Universe::heap()->is_gc_active(), "locking failed"); +} + +inline void GC_locker::unlock() { + // cast away volatile + Atomic::dec(&_lock_count); + CHECK_UNHANDLED_OOPS_ONLY( + if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count--; }) +} + +inline void GC_locker::lock_critical(JavaThread* thread) { + if (!thread->in_critical()) { + if (!needs_gc()) { + jni_lock(); + } else { + jni_lock_slow(); + } + } + thread->enter_critical(); +} + +inline void GC_locker::unlock_critical(JavaThread* thread) { + thread->exit_critical(); + if (!thread->in_critical()) { + if (!needs_gc()) { + jni_unlock(); + } else { + jni_unlock_slow(); + } + } +}