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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
//
// Copyright (C) 2024 Intel Corporation
#include "thread_pool.hpp"
#include <opencv2/gapi/util/throw.hpp>
cv::gapi::own::Latch::Latch(const uint64_t expected)
: m_expected(expected) {
}
void cv::gapi::own::Latch::count_down() {
std::lock_guard<std::mutex> lk{m_mutex};
--m_expected;
if (m_expected == 0) {
m_all_done.notify_all();
}
}
void cv::gapi::own::Latch::wait() {
std::unique_lock<std::mutex> lk{m_mutex};
while (m_expected != 0u) {
m_all_done.wait(lk);
}
}
cv::gapi::own::ThreadPool::ThreadPool(const uint32_t num_workers) {
m_workers.reserve(num_workers);
for (uint32_t i = 0; i < num_workers; ++i) {
m_workers.emplace_back(
cv::gapi::own::ThreadPool::worker, std::ref(m_queue));
}
}
void cv::gapi::own::ThreadPool::worker(QueueClass<Task>& queue) {
while (true) {
cv::gapi::own::ThreadPool::Task task;
queue.pop(task);
if (!task) {
break;
}
task();
}
}
void cv::gapi::own::ThreadPool::schedule(cv::gapi::own::ThreadPool::Task&& task) {
m_queue.push(std::move(task));
};
void cv::gapi::own::ThreadPool::shutdown() {
for (size_t i = 0; i < m_workers.size(); ++i) {
// NB: Empty task - is an indicator for workers to stop their loops
m_queue.push({});
}
for (auto& worker : m_workers) {
worker.join();
}
m_workers.clear();
}
cv::gapi::own::ThreadPool::~ThreadPool() {
shutdown();
}
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