1/*
2 * Copyright (c) 2016, 2018, 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#include "precompiled.hpp"
25#include "gc/z/zResurrection.hpp"
26#include "runtime/orderAccess.hpp"
27#include "runtime/safepoint.hpp"
28#include "utilities/debug.hpp"
29
30volatile bool ZResurrection::_blocked = false;
31
32void ZResurrection::block() {
33 assert(SafepointSynchronize::is_at_safepoint(), "Should be at safepoint");
34 _blocked = true;
35}
36
37void ZResurrection::unblock() {
38 // We use a storestore barrier to make sure all healed
39 // oops are visible before we unblock resurrection.
40 OrderAccess::storestore();
41 _blocked = false;
42}
43