verdnatura-chat/ios/Pods/Flipper-Folly/folly/futures/SharedPromise-inl.h

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/*
* Copyright (c) Facebook, Inc. and its 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
* 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
namespace folly {
template <class T>
size_t SharedPromise<T>::size() const {
std::lock_guard<std::mutex> g(mutex_);
return size_.value;
}
template <class T>
SemiFuture<T> SharedPromise<T>::getSemiFuture() const {
std::lock_guard<std::mutex> g(mutex_);
size_.value++;
if (hasResult()) {
return makeFuture<T>(Try<T>(try_.value));
} else {
promises_.emplace_back();
if (interruptHandler_) {
promises_.back().setInterruptHandler(interruptHandler_);
}
return promises_.back().getSemiFuture();
}
}
template <class T>
Future<T> SharedPromise<T>::getFuture() const {
return getSemiFuture().via(&InlineExecutor::instance());
}
template <class T>
template <class E>
typename std::enable_if<std::is_base_of<std::exception, E>::value>::type
SharedPromise<T>::setException(E const& e) {
setTry(Try<T>(e));
}
template <class T>
void SharedPromise<T>::setException(exception_wrapper ew) {
setTry(Try<T>(std::move(ew)));
}
template <class T>
void SharedPromise<T>::setInterruptHandler(
std::function<void(exception_wrapper const&)> fn) {
std::lock_guard<std::mutex> g(mutex_);
if (hasResult()) {
return;
}
interruptHandler_ = fn;
for (auto& p : promises_) {
p.setInterruptHandler(fn);
}
}
template <class T>
template <class M>
void SharedPromise<T>::setValue(M&& v) {
setTry(Try<T>(std::forward<M>(v)));
}
template <class T>
template <class F>
void SharedPromise<T>::setWith(F&& func) {
setTry(makeTryWith(std::forward<F>(func)));
}
template <class T>
void SharedPromise<T>::setTry(Try<T>&& t) {
std::vector<Promise<T>> promises;
{
std::lock_guard<std::mutex> g(mutex_);
if (hasResult()) {
throw_exception<PromiseAlreadySatisfied>();
}
try_.value = std::move(t);
promises.swap(promises_);
}
for (auto& p : promises) {
p.setTry(Try<T>(try_.value));
}
}
template <class T>
bool SharedPromise<T>::isFulfilled() const {
std::lock_guard<std::mutex> g(mutex_);
return hasResult();
}
} // namespace folly