systemwide_memory_barrier.hh

/*
 * This file is open source software, licensed to you under the terms
 * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership.  You may not use this file except in compliance with the License.
 *
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/*
 * Copyright 2015 Scylla DB
 */
 
#pragma once
 
namespace seastar {
 
 
// cause all threads to invoke a full memory barrier
void systemwide_memory_barrier();
// attempt to invoke a systemwide memory barrier; return false
// if doing so would cause lock contention in the kernel
bool try_systemwide_memory_barrier();
 
 
}