83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <folly/futures/Future.h>
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#include <folly/Likely.h>
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#include <folly/futures/ThreadWheelTimekeeper.h>
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namespace folly {
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namespace futures {
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SemiFuture<Unit> sleep(HighResDuration dur, Timekeeper* tk) {
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std::shared_ptr<Timekeeper> tks;
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if (LIKELY(!tk)) {
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tks = folly::detail::getTimekeeperSingleton();
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tk = tks.get();
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}
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if (UNLIKELY(!tk)) {
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return makeSemiFuture<Unit>(FutureNoTimekeeper());
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}
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return tk->after(dur);
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}
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Future<Unit> sleepUnsafe(HighResDuration dur, Timekeeper* tk) {
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return sleep(dur, tk).toUnsafeFuture();
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}
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#if FOLLY_FUTURE_USING_FIBER
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namespace {
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template <typename Ptr>
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class FutureWaiter : public fibers::Baton::Waiter {
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public:
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FutureWaiter(Promise<Unit> promise, Ptr baton)
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: promise_(std::move(promise)), baton_(std::move(baton)) {
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baton_->setWaiter(*this);
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}
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void post() override {
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promise_.setValue();
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delete this;
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}
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private:
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Promise<Unit> promise_;
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Ptr baton_;
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};
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} // namespace
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SemiFuture<Unit> wait(std::unique_ptr<fibers::Baton> baton) {
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Promise<Unit> promise;
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auto sf = promise.getSemiFuture();
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new FutureWaiter<std::unique_ptr<fibers::Baton>>(
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std::move(promise), std::move(baton));
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return sf;
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}
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SemiFuture<Unit> wait(std::shared_ptr<fibers::Baton> baton) {
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Promise<Unit> promise;
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auto sf = promise.getSemiFuture();
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new FutureWaiter<std::shared_ptr<fibers::Baton>>(
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std::move(promise), std::move(baton));
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return sf;
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}
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#endif
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} // namespace futures
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} // namespace folly
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