src/hotspot/share/runtime/semaphore.inline.hpp
author stefank
Sun, 20 May 2018 22:10:45 +0200
changeset 50192 8bc79d2d1568
child 50232 3c6dc4b291cd
permissions -rw-r--r--
8203341: Add a safepoint-aware Semaphore Reviewed-by: pliden, eosterlund

/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_VM_RUNTIME_SEMAPHORE_INLINE_HPP
#define SHARE_VM_RUNTIME_SEMAPHORE_INLINE_HPP

#include "runtime/interfaceSupport.inline.hpp"
#include "runtime/semaphore.hpp"
#include "runtime/thread.inline.hpp"

inline void Semaphore::wait_with_safepoint_check(JavaThread* thread) {
  // Prepare to block and allow safepoints while blocked
  ThreadBlockInVM tbivm(thread);
  OSThreadWaitState osts(thread->osthread(), false /* not in Object.wait() */);

  // Wait for value
  _impl.wait();
}

inline void Semaphore::wait_with_safepoint_check() {
  Thread* thread = Thread::current();
  if (thread->is_Java_thread()) {
    wait_with_safepoint_check(static_cast<JavaThread*>(thread));
  } else {
    // Wait for value
    _impl.wait();
  }
}

#endif // SHARE_VM_RUNTIME_SEMAPHORE_INLINE_HPP