Fix model extract race issue to all classes

modules/ANSODEngine/ANSFaceDetectorEngine.cpp

@@ -62,13 +62,22 @@ namespace ANSCENTER
 			size_t vectorSize = passwordArray.size();
 			for (size_t i = 0; i < vectorSize; i++) {
 				if (ExtractPasswordProtectedZip(modelZipFilePath, passwordArray[i], modelName, _modelFolder, false))
-					break; // Break the loop when the condition is met. 
+					break; // Break the loop when the condition is met.
 			}
 			// 2. Check if the outputFolder exist
 			if (!std::filesystem::exists(_modelFolder)) {
 				this->_logger.LogError("ANSFDBase::LoadModel. Output model folder is not exist", _modelFolder, __FILE__, __LINE__);
 				return false; // That means the model file is not exist or the password is not correct
 			}
+			// Serialize derived init against concurrent extract re-entries on the
+			// same folder. See ModelFolderLockGuard in ANSEngineCommon.h.
+			ModelFolderLockGuard _flg(_modelFolder, "ANSFDBase::LoadModel");
+			if (!_flg.acquired()) {
+				this->_logger.LogError("ANSFDBase::LoadModel",
+					"Timed out waiting for model-folder lock: " + _modelFolder,
+					__FILE__, __LINE__);
+				return false;
+			}
 			// 3. Check if the model has the configuration file
 			std::string modelConfigName = "model_config.json";
 			_modelConfigFile = CreateFilePath(_modelFolder, modelConfigName);
@@ -160,6 +169,15 @@ namespace ANSCENTER
 				this->_logger.LogError("ANSFDBase::Initialize. Output model folder does not exist", _modelFolder, __FILE__, __LINE__);
 				return false;
 			}
+			// Serialize derived init against concurrent extract re-entries on the
+			// same folder. See ModelFolderLockGuard in ANSEngineCommon.h.
+			ModelFolderLockGuard _flg(_modelFolder, "ANSFDBase::Initialize");
+			if (!_flg.acquired()) {
+				this->_logger.LogError("ANSFDBase::Initialize",
+					"Timed out waiting for model-folder lock: " + _modelFolder,
+					__FILE__, __LINE__);
+				return false;
+			}
 			_modelConfigFile = CreateFilePath(_modelFolder, "model_config.json");
 
 			// 4. Load the image processing model