src/hotspot/share/gc/z/zFuture.inline.hpp
author mgronlun
Wed, 30 Oct 2019 19:43:52 +0100
changeset 58863 c16ac7a2eba4
parent 58815 a4cdca87152b
permissions -rw-r--r--
8226511: Implement JFR Event Streaming Reviewed-by: egahlin, mseledtsov, mgronlun Contributed-by: erik.gahlin@oracle.com, mikhailo.seledtsov@oracle.com, markus.gronlund@oracle.com
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/*
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 * Copyright (c) 2015, 2019, 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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#ifndef SHARE_GC_Z_ZFUTURE_INLINE_HPP
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#define SHARE_GC_Z_ZFUTURE_INLINE_HPP
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#include "gc/z/zFuture.hpp"
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#include "runtime/semaphore.inline.hpp"
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#include "runtime/thread.hpp"
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template <typename T>
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inline ZFuture<T>::ZFuture() :
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    _value() {}
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template <typename T>
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inline void ZFuture<T>::set(T value) {
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  // Set value
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  _value = value;
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  // Notify waiter
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  _sema.signal();
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}
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template <typename T>
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inline T ZFuture<T>::peek() {
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  return _value;
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}
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template <typename T>
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inline T ZFuture<T>::get() {
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  // Wait for notification
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  Thread* const thread = Thread::current();
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  if (thread->is_Java_thread()) {
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    _sema.wait_with_safepoint_check((JavaThread*)thread);
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  } else {
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    _sema.wait();
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  }
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  // Return value
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  return _value;
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}
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#endif // SHARE_GC_Z_ZFUTURE_INLINE_HPP