Fix model extract race issue to all classes

modules/ANSOCR/ANSCpuOCR.cpp

@@ -13,6 +13,15 @@ namespace ANSCENTER {
 		{
 			bool result = ANSOCRBase::Initialize(licenseKey, modelConfig, modelZipFilePath, modelZipPassword, engineMode);
 			if (!result) return false;
+			// Serialize derived init against concurrent extract re-entries on the
+			// same folder. See ModelFolderLockGuard in Utility.h.
+			ANSCENTER::ModelFolderLockGuard _flg(_modelFolder, "ANSCPUOCR::Initialize");
+			if (!_flg.acquired()) {
+			    this->_logger.LogError("ANSCPUOCR::Initialize",
+			        "Timed out waiting for model-folder lock: " + _modelFolder,
+			        __FILE__, __LINE__);
+			    return false;
+			}
 
 			//Override the paddleocrv3 for openvino only
 			switch (_modelConfig.ocrLanguage) {