| // Copyright (C) 2019 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. |
| |
| #ifndef IORAP_SRC_COMMON_RX_ASYNC_H_ |
| #define IORAP_SRC_COMMON_RX_ASYNC_H_ |
| |
| #include "common/async_pool.h" |
| |
| #include <rxcpp/rx.hpp> |
| |
| namespace iorap::common { |
| |
| // Helper functions to operate with rx chains asynchronously. |
| class RxAsync { |
| public: |
| // Subscribe to the observable on a new thread asynchronously. |
| // If no observe_on/subscribe_on is used, the chain will execute |
| // on that new thread. |
| // |
| // Returns the composite_subscription which can be used to |
| // unsubscribe from if we want to abort the chain early. |
| template <typename T, typename U> |
| static rxcpp::composite_subscription SubscribeAsync( |
| AsyncPool& async_pool, |
| T&& observable, |
| U&& subscriber) { |
| rxcpp::composite_subscription subscription; |
| |
| async_pool.LaunchAsync([subscription, // safe copy: ref-counted |
| observable=std::forward<T>(observable), |
| subscriber=std::forward<U>(subscriber)]() mutable { |
| observable |
| .as_blocking() |
| .subscribe(subscription, |
| std::forward<decltype(subscriber)>(subscriber)); |
| }); |
| |
| return subscription; |
| } |
| |
| template <typename T, typename U, typename E> |
| static rxcpp::composite_subscription SubscribeAsync( |
| AsyncPool& async_pool, |
| T&& observable, |
| U&& on_next, |
| E&& on_error) { |
| rxcpp::composite_subscription subscription; |
| |
| async_pool.LaunchAsync([subscription, // safe copy: ref-counted |
| observable=std::forward<T>(observable), |
| on_next=std::forward<U>(on_next), |
| on_error=std::forward<E>(on_error)]() mutable { |
| observable |
| .as_blocking() |
| .subscribe(subscription, |
| std::forward<decltype(on_next)>(on_next), |
| std::forward<decltype(on_error)>(on_error)); |
| }); |
| |
| return subscription; |
| } |
| }; |
| |
| } // namespace iorap::common |
| |
| #endif // IORAP_SRC_COMMON_RX_ASYNC_H_ |