Method m_StartThumbnailFileDatasExtraction

ImGuiFileDialog.cpp:2917–2930

#ifdef USE_THUMBNAILS
void IGFD::ThumbnailFeature::m_StartThumbnailFileDatasExtraction() {
    const bool res = m_ThumbnailGenerationThread.use_count() && m_ThumbnailGenerationThread->joinable();
    if (!res) {
        m_IsWorking                 = true;
        m_CountFiles                = 0U;
        m_ThumbnailGenerationThread = std::shared_ptr<std::thread>(new std::thread(&IGFD::ThumbnailFeature::m_ThreadThumbnailFileDatasExtractionFunc, this), [this](std::thread* obj_ptr) {
            m_IsWorking = false;
            if (obj_ptr != nullptr) {
                m_ThumbnailFileDatasToGetCv.notify_all();
                obj_ptr->join();
            }
        });
    }
}

bool IGFD::ThumbnailFeature::m_StopThumbnailFileDatasExtraction() {
    const bool res = m_ThumbnailGenerationThread.use_count() && m_ThumbnailGenerationThread->joinable();