print req

$2 = {
  next = 0x0, 
  result = 0, 
  offs = 0, 
  size = 0, 
  ptr1 = 0x0, 
  ptr2 = 0x0, 
  nv1 = 0, 
  nv2 = 0, 
  type = 0, 
  int1 = 0, 
  int2 = 0, 
  int3 = 0, 
  errorno = 0, 
  flags = 0 '\0', 
  pri = 0 '\0', 
  data = 0x400, 
  finish = 0x833c370, 
  destroy = 0xb5bd0b69 <Sqlite3Db::eio_AfterConnect(eio_req*)>, 
  feed = 0x80ecfe0 <eio_api_destroy>, 
  grp = 0xb5bd09f2, 
  grp_prev = 0x0, 
  grp_next = 0x0, 
  grp_first = 0x0
}