src/hotspot/share/gc/shared/gcLocker.inline.hpp
author eosterlund
Tue, 16 Oct 2018 13:18:22 +0200
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8210498: nmethod entry barriers Reviewed-by: kvn, pliden
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/*
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 * Copyright (c) 2000, 2015, 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_GC_SHARED_GCLOCKER_INLINE_HPP
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#define SHARE_VM_GC_SHARED_GCLOCKER_INLINE_HPP
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#include "gc/shared/gcLocker.hpp"
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#include "runtime/thread.hpp"
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void GCLocker::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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void GCLocker::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_GC_SHARED_GCLOCKER_INLINE_HPP