93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
// 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_DEVICE_ASYNC_CALLBACK_IMPL_H_
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#define MYNTEYE_DEVICE_ASYNC_CALLBACK_IMPL_H_
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#pragma once
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#include <string>
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#include <utility>
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#include "mynteye/logger.h"
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MYNTEYE_BEGIN_NAMESPACE
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template <class Data>
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AsyncCallback<Data>::AsyncCallback(
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std::string name, callback_t callback, std::size_t max_data_size)
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: name_(std::move(name)),
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callback_(std::move(callback)),
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count_(0),
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max_data_size_(max_data_size) {
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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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if (max_data_size_ <= 0) {
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datas_.clear();
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} else if (max_data_size_ == datas_.size()) { // >= 1
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datas_.erase(datas_.begin());
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}
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datas_.push_back(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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for (auto &&data : datas_) {
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callback_(data);
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}
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}
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if (VLOG_IS_ON(2) && count_ > datas_.size()) {
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VLOG(2) << "AsyncCallback(" << name_ << ") dropped "
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<< (count_ - datas_.size());
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}
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count_ = 0;
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datas_.clear();
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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_DEVICE_ASYNC_CALLBACK_IMPL_H_
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