71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
/*
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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/executors/TimedDrivableExecutor.h>
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#include <cstring>
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#include <ctime>
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#include <string>
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#include <tuple>
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namespace folly {
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void TimedDrivableExecutor::add(Func callback) {
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queue_.enqueue(std::move(callback));
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}
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void TimedDrivableExecutor::drive() noexcept {
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wait();
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run();
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}
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size_t TimedDrivableExecutor::run() noexcept {
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size_t count = 0;
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size_t n = queue_.size();
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// If we have waited already, then func_ may have a value
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if (func_) {
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auto f = std::move(func_);
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f();
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count = 1;
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}
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while (count < n && queue_.try_dequeue(func_)) {
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auto f = std::move(func_);
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f();
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++count;
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}
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return count;
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}
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size_t TimedDrivableExecutor::drain() noexcept {
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size_t tasksRun = 0;
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size_t tasksForSingleRun = 0;
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while ((tasksForSingleRun = run()) != 0) {
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tasksRun += tasksForSingleRun;
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}
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return tasksRun;
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}
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void TimedDrivableExecutor::wait() noexcept {
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if (!func_) {
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queue_.dequeue(func_);
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}
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}
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} // namespace folly
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