76 lines
2.3 KiB
C++
76 lines
2.3 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/TimeoutQueue.h>
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#include <algorithm>
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#include <vector>
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namespace folly {
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TimeoutQueue::Id
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TimeoutQueue::add(int64_t now, int64_t delay, Callback callback) {
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Id id = nextId_++;
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timeouts_.insert({id, now + delay, -1, std::move(callback)});
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return id;
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}
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TimeoutQueue::Id
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TimeoutQueue::addRepeating(int64_t now, int64_t interval, Callback callback) {
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Id id = nextId_++;
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timeouts_.insert({id, now + interval, interval, std::move(callback)});
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return id;
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}
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int64_t TimeoutQueue::nextExpiration() const {
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return (
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timeouts_.empty() ? std::numeric_limits<int64_t>::max()
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: timeouts_.get<BY_EXPIRATION>().begin()->expiration);
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}
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bool TimeoutQueue::erase(Id id) {
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return timeouts_.get<BY_ID>().erase(id);
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}
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int64_t TimeoutQueue::runInternal(int64_t now, bool onceOnly) {
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auto& byExpiration = timeouts_.get<BY_EXPIRATION>();
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int64_t nextExp;
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do {
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const auto end = byExpiration.upper_bound(now);
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std::vector<Event> expired;
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std::move(byExpiration.begin(), end, std::back_inserter(expired));
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byExpiration.erase(byExpiration.begin(), end);
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for (const auto& event : expired) {
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// Reinsert if repeating, do this before executing callbacks
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// so the callbacks have a chance to call erase
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if (event.repeatInterval >= 0) {
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timeouts_.insert({event.id,
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now + event.repeatInterval,
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event.repeatInterval,
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event.callback});
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}
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}
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// Call callbacks
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for (const auto& event : expired) {
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event.callback(event.id, now);
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}
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nextExp = nextExpiration();
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} while (!onceOnly && nextExp <= now);
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return nextExp;
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}
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} // namespace folly
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