79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
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// Copyright 2018 Slightech Co., Ltd. All rights reserved.
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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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#ifndef MYNTEYE_INTERNAL_ASYNC_CALLBACK_IMPL_H_ // NOLINT
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#define MYNTEYE_INTERNAL_ASYNC_CALLBACK_IMPL_H_
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#pragma once
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#include <glog/logging.h>
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#include <string>
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#include <utility>
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MYNTEYE_BEGIN_NAMESPACE
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template <class Data>
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AsyncCallback<Data>::AsyncCallback(std::string name, callback_t callback)
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: name_(std::move(name)), callback_(std::move(callback)), count_(0) {
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VLOG(2) << __func__;
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running_ = true;
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thread_ = std::thread(&AsyncCallback<Data>::Run, this);
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}
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template <class Data>
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AsyncCallback<Data>::~AsyncCallback() {
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VLOG(2) << __func__;
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{
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std::lock_guard<std::mutex> _(mtx_);
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running_ = false;
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++count_;
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}
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cv_.notify_one();
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if (thread_.joinable()) {
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thread_.join();
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}
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}
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template <class Data>
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void AsyncCallback<Data>::PushData(Data data) {
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std::lock_guard<std::mutex> _(mtx_);
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data_ = data;
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++count_;
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cv_.notify_one();
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}
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template <class Data>
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void AsyncCallback<Data>::Run() {
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VLOG(2) << "AsyncCallback(" << name_ << ") thread start";
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while (true) {
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std::unique_lock<std::mutex> lock(mtx_);
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cv_.wait(lock, [this] { return count_ > 0; });
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if (!running_)
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break;
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if (callback_)
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callback_(data_);
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if (VLOG_IS_ON(2) && count_ > 1) {
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VLOG(2) << "AsyncCallback(" << name_ << ") dropped " << (count_ - 1);
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}
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count_ = 0;
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}
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VLOG(2) << "AsyncCallback(" << name_ << ") thread end";
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}
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MYNTEYE_END_NAMESPACE
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#endif // MYNTEYE_INTERNAL_ASYNC_CALLBACK_IMPL_H_ NOLINT
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