-# if !defined(OPENSSL_THREADS) || defined(CRYPTO_TDEBUG)
-typedef unsigned int CRYPTO_ONCE;
-typedef unsigned int CRYPTO_THREAD_LOCAL;
-typedef unsigned int CRYPTO_THREAD_ID;
-
-# define CRYPTO_ONCE_STATIC_INIT 0
-# elif defined(OPENSSL_SYS_WINDOWS)
-# include <windows.h>
+# if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG)
+# if defined(_WIN32)
+# if defined(BASETYPES) || defined(_WINDEF_H)
+/* application has to include <windows.h> in order to use this */