fix: add dll search path

Author: sangjanai

cortex-cpp/controllers/server.cc

@@ -19,12 +19,15 @@ constexpr static auto kOnnxEngine = "cortex.onnx";
 constexpr static auto kTensorrtLlmEngine = "cortex.tensorrt-llm";
 }  // namespace
 
-server::server(){
-
-    // Some default values for now below
-    // log_disable();  // Disable the log to file feature, reduce bloat for
-    // target
-    // system ()
+server::server() {
+
+// Some default values for now below
+// log_disable();  // Disable the log to file feature, reduce bloat for
+// target
+// system ()
+#if defined(WIN32)
+  SetDefaultDllDirectories(LOAD_LIBRARY_SEARCH_DEFAULT_DIRS);
+#endif
 };
 
 server::~server() {}
@@ -292,6 +295,12 @@ void server::LoadModel(const HttpRequestPtr& req,
           (getenv("ENGINE_PATH") ? getenv("ENGINE_PATH")
                                  : cortex_utils::GetCurrentPath()) +
           get_engine_path(engine_type);
+#if defined(WIN32)
+      auto ws = std::wstring(abs_path.begin(), abs_path.end());
+      if(AddDllDirectory(ws.c_str()) == 0) {
+        LOG_WARN << "Could not add dll directory: " << abs_path;
+      }
+#endif
       engines_[engine_type].dl =
           std::make_unique<cortex_cpp::dylib>(abs_path, "engine");