skeleton nif that runs

geef.c

@@ -0,0 +1,44 @@
+#include "erl_nif.h"
+
+static int
+load(ErlNifEnv* env, void** priv, ERL_NIF_TERM load_info)
+{
+    return 0;
+}
+
+static int
+reload(ErlNifEnv* env, void** priv, ERL_NIF_TERM load_info)
+{
+    return 0;
+}
+
+static int
+upgrade(ErlNifEnv* env, void** priv, void** old_priv,
+          ERL_NIF_TERM load_info)
+{
+    return 0;
+}
+
+static void
+unload(ErlNifEnv* env, void* priv)
+{
+    return;
+}
+
+static ERL_NIF_TERM
+object_exists(ErlNifEnv* env, ERL_NIF_TERM a1)
+{
+    unsigned long val;
+    if(!enif_get_ulong(env, a1, &val)) {
+        return enif_make_badarg(env);
+    } else {
+        return enif_make_ulong(env, val*2);
+    }
+}
+
+static ErlNifFunc geef_funcs[] =
+{
+    {"object_exists", 1, object_exists}
+};
+
+ERL_NIF_INIT(geef, geef_funcs, load, reload, upgrade, unload)