folly/folly/concurrency/memory/AtomicReadMostlyMainPtr.cpp

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 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
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 * See the License for the specific language governing permissions and
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#include <folly/concurrency/memory/AtomicReadMostlyMainPtr.h>

#include <folly/executors/InlineExecutor.h>

namespace folly {
namespace detail {

namespace {
struct FailingExecutor : folly::Executor { … };
} // namespace

// *All* modifications of *all* AtomicReadMostlyMainPtrs use the same mutex and
// domain. The first of these just shrinks the size of the individual objects a
// little, but the second is necessary for correctness; we want to support
// arbitrarily many AtomicReadMostlyMainPtrs.
Indestructible<std::mutex> atomicReadMostlyMu;
Indestructible<folly::rcu_domain> atomicReadMostlyDomain(new FailingExecutor);

} // namespace detail
} // namespace folly