2 * Copyright 2017 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 #include <folly/experimental/RCUUtils.h>
18 #include <folly/ThreadLocal.h>
24 struct RCURegisterThreadHelper {
25 RCURegisterThreadHelper() {
26 rcu_register_thread();
29 ~RCURegisterThreadHelper() {
30 rcu_unregister_thread();
38 bool RCURegisterThread() {
39 static folly::ThreadLocal<RCURegisterThreadHelper>* rcuRegisterThreadHelper =
40 new folly::ThreadLocal<RCURegisterThreadHelper>();
42 auto& helper = **rcuRegisterThreadHelper;
44 auto ret = !helper.alive;
50 RCUReadLock& RCUReadLock::instance() {
51 // Both lock and unlock are static, so no need to worry about destruction
53 static RCUReadLock instance;