Function apr_thread_data_get 

pub unsafe extern "C" fn apr_thread_data_get(
    data: *mut *mut c_void,
    key: *const c_char,
    thread: *mut apr_thread_t,
) -> apr_status_t

Return user data associated with the current thread. @param data The user data associated with the thread. @param key The key to associate with the data @param thread The currently open thread.