[erlang-questions] erl_nif environment in the load() function

[Michael Uvarov]

Hello,

There is code as example:
https://github.com/beerriot/icu4e/blob/master/c_src/ustring.c

I have few questions:
1. How long is env's lifetime in the load(...)? Will the env be erased
after the call or after module unloading?
2. Is this code valid?

ERL_NIF_TERM ustring_endian(ErlNifEnv* env, int argc,
                            const ERL_NIF_TERM argv[]) {
    return ATOM_ENDIAN;
}

Is the next construction better?

return enif_make_copy(env, ATOM_ENDIAN);
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