Use boost::asio for asynchronous processing

scwx-qt/source/scwx/qt/main/main.cpp

@@ -3,30 +3,66 @@
 #include <scwx/qt/manager/resource_manager.hpp>
 #include <scwx/qt/manager/settings_manager.hpp>
 #include <scwx/util/logger.hpp>
+#include <scwx/util/threads.hpp>
 
 #include <aws/core/Aws.h>
+#include <boost/asio.hpp>
 #include <spdlog/spdlog.h>
 #include <QApplication>
 
+static const std::string logPrefix_ = "scwx::main";
+static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
+
 int main(int argc, char* argv[])
 {
+   // Initialize logger
    scwx::util::Logger::Initialize();
    spdlog::set_level(spdlog::level::debug);
 
    QCoreApplication::setApplicationName("Supercell Wx");
 
+   // Start the io_context main loop
+   boost::asio::io_context& ioContext = scwx::util::io_context();
+   auto                     work      = boost::asio::make_work_guard(ioContext);
+   boost::asio::thread_pool threadPool {4};
+   boost::asio::post(threadPool,
+                     [&]()
+                     {
+                        while (true)
+                        {
+                           try
+                           {
+                              ioContext.run();
+                              break; // run() exited normally
+                           }
+                           catch (std::exception& ex)
+                           {
+                              // Log exception and continue
+                              logger_->error(ex.what());
+                           }
+                        }
+                     });
+
+   // Initialize AWS SDK
    Aws::SDKOptions awsSdkOptions;
    Aws::InitAPI(awsSdkOptions);
 
+   // Initialize application
    scwx::qt::config::RadarSite::Initialize();
    scwx::qt::manager::SettingsManager::Initialize();
    scwx::qt::manager::ResourceManager::PreLoad();
 
+   // Run Qt main loop
    QApplication               a(argc, argv);
    scwx::qt::main::MainWindow w;
    w.show();
    int result = a.exec();
 
+   // Gracefully stop the io_context main loop
+   work.reset();
+   threadPool.join();
+
+   // Shutdown AWS SDK
    Aws::ShutdownAPI(awsSdkOptions);
 
    return result;