84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
/*
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* ActorCollection.actor.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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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 "flow/ActorCollection.h"
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#include "flow/IndexedSet.h"
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#include "flow/UnitTest.h"
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#include "flow/actorcompiler.h" // This must be the last #include.
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ACTOR Future<Void> actorCollection(FutureStream<Future<Void>> addActor,
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int* pCount,
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double* lastChangeTime,
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double* idleTime,
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double* allTime,
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bool returnWhenEmptied) {
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state int64_t nextTag = 0;
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state Map<int64_t, Future<Void>> tag_streamHelper;
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state PromiseStream<int64_t> complete;
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state PromiseStream<Error> errors;
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state int count = 0;
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if (!pCount)
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pCount = &count;
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loop choose {
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when(Future<Void> f = waitNext(addActor)) {
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int64_t t = nextTag++;
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tag_streamHelper[t] = streamHelper(complete, errors, tag(f, t));
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++*pCount;
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if (*pCount == 1 && lastChangeTime && idleTime && allTime) {
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double currentTime = now();
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*idleTime += currentTime - *lastChangeTime;
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*allTime += currentTime - *lastChangeTime;
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*lastChangeTime = currentTime;
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}
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}
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when(int64_t t = waitNext(complete.getFuture())) {
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if (!--*pCount) {
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if (lastChangeTime && idleTime && allTime) {
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double currentTime = now();
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*allTime += currentTime - *lastChangeTime;
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*lastChangeTime = currentTime;
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}
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if (returnWhenEmptied)
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return Void();
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}
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tag_streamHelper.erase(t);
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}
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when(Error e = waitNext(errors.getFuture())) { throw e; }
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}
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}
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template <class T, class U>
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struct Traceable<std::pair<T, U>> {
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static constexpr bool value = Traceable<T>::value && Traceable<U>::value;
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static std::string toString(const std::pair<T, U>& p) {
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auto tStr = Traceable<T>::toString(p.first);
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auto uStr = Traceable<U>::toString(p.second);
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std::string result(tStr.size() + uStr.size() + 3, 'x');
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std::copy(tStr.begin(), tStr.end(), result.begin());
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auto iter = result.begin() + tStr.size();
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*(iter++) = ' ';
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*(iter++) = '-';
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*(iter++) = ' ';
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std::copy(uStr.begin(), uStr.end(), iter);
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return result;
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}
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};
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