/*
 * Copyright (c) 2016, 2022, 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
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 */

#include "precompiled.hpp"
#include "gc/x/xResurrection.hpp"
#include "runtime/atomic.hpp"
#include "runtime/safepoint.hpp"
#include "utilities/debug.hpp"

volatile bool XResurrection::_blocked = false;

void XResurrection::block() {
  assert(SafepointSynchronize::is_at_safepoint(), "Should be at safepoint");
  _blocked = true;
}

void XResurrection::unblock() {
  // No need for anything stronger than a relaxed store here.
  // The preceding handshake makes sure that all non-strong
  // oops have already been healed at this point.
  Atomic::store(&_blocked, false);
}