Fix ANSOCR TensorRT Release

modules/ANSOCR/dllmain.cpp

@@ -8,6 +8,8 @@
 #include "ANSGpuFrameRegistry.h"
 #include <json.hpp>
 #include "NV12PreprocessHelper.h"
+#include "engine/TRTEngineCache.h"
+#include "engine/EnginePoolManager.h"
 #include <unordered_map>
 #include <condition_variable>
 #include <cstdint>
@@ -93,7 +95,32 @@ BOOL APIENTRY DllMain(HMODULE hModule,
 	case DLL_PROCESS_ATTACH:
 	case DLL_THREAD_ATTACH:
 	case DLL_THREAD_DETACH:
+		break;
 	case DLL_PROCESS_DETACH:
+		// When lpReserved != NULL, the process is terminating via ExitProcess.
+		// The OS has already killed all worker threads (idle timers, CUDA
+		// threads, etc.).  Set the global flag so atexit destructors skip
+		// thread joins and CUDA/TRT cleanup that would fail on a dead context.
+		if (lpReserved != nullptr) {
+			g_processExiting().store(true, std::memory_order_relaxed);
+			break;
+		}
+
+		// Dynamic FreeLibrary — threads are still alive, safe to clean up.
+		try {
+			std::vector<ANSCENTER::ANSOCRBase*> leakedHandles;
+			{
+				std::lock_guard<std::mutex> lk(OCRHandleRegistryMutex());
+				for (auto& [h, _] : OCRHandleRegistry())
+					leakedHandles.push_back(h);
+				OCRHandleRegistry().clear();
+			}
+			for (auto* h : leakedHandles) {
+				try { h->Destroy(); delete h; } catch (...) {}
+			}
+			try { EnginePoolManager<float>::instance().clearAll(); } catch (...) {}
+			try { TRTEngineCache::instance().clearAll(); } catch (...) {}
+		} catch (...) {}
 		break;
 	}
 	return TRUE;