add dummy first call

Author: lookbe

Runtime/Core/LlamaBackend.cs

@@ -42,6 +42,8 @@ public static void Init()
         {
             if (count == 0)
             {
+                Native.llama_max_devices();
+
 #if UNITY_STANDALONE_WIN || UNITY_EDITOR_WIN
                 string packagePath = NativeDllPath.GetDirectory("llama.dll");
                 Native.ggml_backend_load(Path.Join(packagePath, "ggml-cpu-x64.dll"));

Runtime/Native/LlamaNative.cs

@@ -175,6 +175,10 @@ public unsafe struct llama_token_data_array
         [DllImport(LlamaDll, CallingConvention = CallingConvention.Cdecl)]
         public static extern void llama_log_set(ggml_log_callback log_callback, IntPtr user_data);
 
+        [DllImport(LlamaDll, CallingConvention = CallingConvention.Cdecl)]
+        public static extern long llama_max_devices();
+
+
         // backend
         [DllImport(LlamaDll, CallingConvention = CallingConvention.Cdecl)]
         public static extern void llama_backend_init();