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/*
* Copyright 2022 The Android Open Source Project
*
* 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
* 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.
*/
#pragma once
#include <shared_mutex>
namespace android::ftl {
// Wrapper around std::shared_mutex to provide capabilities for thread-safety
// annotations.
// TODO(b/257958323): This class is no longer needed once b/135688034 is fixed (currently blocked on
// b/175635923).
class [[clang::capability("shared_mutex")]] SharedMutex final {
public:
[[clang::acquire_capability()]] void lock() {
mutex_.lock();
}
[[clang::release_capability()]] void unlock() {
mutex_.unlock();
}
[[clang::acquire_shared_capability()]] void lock_shared() {
mutex_.lock_shared();
}
[[clang::release_shared_capability()]] void unlock_shared() {
mutex_.unlock_shared();
}
private:
std::shared_mutex mutex_;
};
} // namespace android::ftl
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