author | never |
Sun, 29 Jan 2012 16:46:04 -0800 | |
changeset 11631 | 33813f69207b |
parent 7397 | 5b173b4ca846 |
child 11793 | 49aa0b2124b6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2012, 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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assert(_needs_gc || SafepointSynchronize::is_at_safepoint(), "only read at safepoint"); |
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verify_critical_count(); |
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return _lock_count > 0 || _jni_lock_count > 0; |
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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 call calls enter_critical under the lock so that the |
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// global lock count and per thread count are in agreement. |
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jni_lock(thread); |
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return; |
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} |
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increment_debug_jni_lock_count(); |
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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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if (thread->in_last_critical()) { |
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if (needs_gc()) { |
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// jni_unlock call calls exit_critical under the lock so that |
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// the global lock count and per thread count are in agreement. |
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jni_unlock(thread); |
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return; |
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} |
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decrement_debug_jni_lock_count(); |
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} |
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thread->exit_critical(); |
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} |
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#endif // SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP |