text: /* ISC license. */
  
  #include <errno.h>
  #include <skalibs/unixmessage.h>
  #include <skalibs/kolbak.h>
  
  int kolbak_call (unixmessage_t const *m, kolbak_queue_t *q)
  {
    if (q->head == q->tail) return (errno = EILSEQ, 0) ;
    if (!(*q->x[q->head].f)(m, q->x[q->head].data)) return 0 ;
    q->head = (q->head + 1) % q->n ;
    return 1 ;
  }
  