1 | /* |
2 | * Copyright 2018-present Facebook, Inc. |
3 | * |
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 |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
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. |
15 | */ |
16 | |
17 | #include <folly/experimental/AtomicReadMostlyMainPtr.h> |
18 | |
19 | #include <folly/executors/InlineExecutor.h> |
20 | |
21 | namespace folly { |
22 | namespace detail { |
23 | |
24 | namespace { |
25 | struct FailingExecutor : folly::Executor { |
26 | // We shouldn't be invoking any callbacks. |
27 | void add(Func func) override { |
28 | LOG(DFATAL) |
29 | << "Added an RCU callback to the AtomicReadMostlyMainPtr executor." ; |
30 | InlineExecutor::instance().add(std::move(func)); |
31 | } |
32 | }; |
33 | } // namespace |
34 | |
35 | // *All* modifications of *all* AtomicReadMostlyMainPtrs use the same mutex and |
36 | // domain. The first of these just shrinks the size of the individual objects a |
37 | // little, but the second is necessary for correctness; all rcu_domains need |
38 | // their own tag (as an rcu_domain API constraint), but we want to support |
39 | // arbitrarily many AtomicReadMostlyMainPtrs. |
40 | Indestructible<std::mutex> atomicReadMostlyMu; |
41 | Indestructible<folly::rcu_domain<detail::AtomicReadMostlyTag>> |
42 | atomicReadMostlyDomain(new FailingExecutor); |
43 | |
44 | } // namespace detail |
45 | } // namespace folly |
46 | |