/*

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "gc/shared/gcLocker.hpp"

#include "runtime/thread.hpp"

void GCLocker::lock_critical(JavaThread* thread) {

  if (!thread->in_critical()) {

    if (needs_gc()) {

      // jni_lock call calls enter_critical under the lock so that the

      // global lock count and per thread count are in agreement.

      jni_lock(thread);

      return;

    }

    increment_debug_jni_lock_count();

  }

  thread->enter_critical();

}

void GCLocker::unlock_critical(JavaThread* thread) {

  if (thread->in_last_critical()) {

    if (needs_gc()) {

      // jni_unlock call calls exit_critical under the lock so that

      // the global lock count and per thread count are in agreement.

      jni_unlock(thread);

      return;

    }

    decrement_debug_jni_lock_count();

  }

  thread->exit_critical();

}