Redirect after login to current URL

I need to do the next step:

To redirect my logout, I put the next code in functions.php

function out_home(){        
    wp_redirect(home_url());
    exit();
}
add_action("wp_logout","out_home");

In my header.php, to change the value of my URL in the login:

$URL_POSTLOGIN = add_query_arg(array(),$wp->request);
    function login_go_home($URL_POSTLOGIN){         
        wp_redirect($URL_POSTLOGIN);
        exit();
    }
    add_action("wp_login","login_go_home");

Maybe is not the best solution but in my case others codes fails.