Function GetProcessInformation

IntelPresentMon/SampleClient/Utils.h:67–116

}

void GetProcessInformation(std::optional<std::string>& processName, std::optional<unsigned int>& processId) {

    try
    {
        // Explicitly set nullopt in optional values
        processId = std::nullopt;
        processName = std::nullopt;

        auto& opt = clio::Options::Get();
        if (bool(opt.processName) ^ bool(opt.processId)) {
            HANDLE processes_snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
            if (processes_snapshot == INVALID_HANDLE_VALUE) {
                processId = std::nullopt;
                processName = std::nullopt;
                return;
            }

            PROCESSENTRY32 process_info;
            process_info.dwSize = sizeof(process_info);

            if (!Process32First(processes_snapshot, &process_info)) {
                // Unable to retrieve the first process
                CloseHandle(processes_snapshot);
                processId = std::nullopt;
                processName = std::nullopt;
                return;
            }

            do {
                if ((bool(opt.processName) && CaseInsensitiveCompare(process_info.szExeFile, *opt.processName)) ||
                    (bool(opt.processId) && process_info.th32ProcessID == *opt.processId)) {
                    CloseHandle(processes_snapshot);
                    processId = process_info.th32ProcessID;
                    processName = process_info.szExeFile;
                    return;
                }
            } while (Process32Next(processes_snapshot, &process_info));

            CloseHandle(processes_snapshot);
        }
    }
    catch (const std::exception& e) {
        std::cout << "Error: " << e.what() << std::endl;
        return;
    }
    catch (...) {
        std::cout << "Unknown Error" << std::endl;
        return;
    }
}