1 /*
   2  * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_SHARED_GCLOCKER_INLINE_HPP
  26 #define SHARE_GC_SHARED_GCLOCKER_INLINE_HPP
  27 
  28 #include "gc/shared/gcLocker.hpp"
  29 #include "runtime/thread.hpp"
  30 
  31 void GCLocker::lock_critical(JavaThread* thread) {
  32   if (!thread->in_critical()) {
  33     if (needs_gc()) {
  34       // jni_lock call calls enter_critical under the lock so that the
  35       // global lock count and per thread count are in agreement.
  36       jni_lock(thread);
  37       return;
  38     }
  39     increment_debug_jni_lock_count();
  40   }
  41   thread->enter_critical();
  42 }
  43 
  44 void GCLocker::unlock_critical(JavaThread* thread) {
  45   if (thread->in_last_critical()) {
  46     if (needs_gc()) {
  47       // jni_unlock call calls exit_critical under the lock so that
  48       // the global lock count and per thread count are in agreement.
  49       jni_unlock(thread);
  50       return;
  51     }
  52     decrement_debug_jni_lock_count();
  53   }
  54   thread->exit_critical();
  55 }
  56 
  57 #endif // SHARE_GC_SHARED_GCLOCKER_INLINE_HPP