Function svn_fs_generate_lock_token 

pub unsafe extern "C" fn svn_fs_generate_lock_token(
    token: *mut *const c_char,
    fs: *mut svn_fs_t,
    pool: *mut apr_pool_t,
) -> *mut svn_error_t

Generate a unique lock-token using @a fs. Return in @a *token, allocated in @a pool.

This can be used in to populate lock->token before calling svn_fs_attach_lock().