debian man page for io_timeout

io_timeout(3)						     Library Functions Manual						     io_timeout(3)

NAME
       io_timeout - set time limit on descriptor

SYNTAX
       #include <io.h>

       void io_timeout(int64 fd,tai6464 deadline);

DESCRIPTION
       The  io	library  keeps track of an optional ``timeout'' for each descriptor. The timeout is a specific moment in time, stored in a tai6464
       variable.

       io_timeout(d,t) sets the timeout for descriptor d to t.

       io_timeout has no return value; it always succeeds. (Space to store the timeout was already allocated as part of the descriptor.) It has no
       effect if d is not the number of a descriptor.

       Note  that you have to call io_timeouted to be notified of timeouts, just like you are calling io_canread or io_canwrite for read and write
       notification.

SEE ALSO
       io_waituntil(3), io_timeouted(3)

																     io_timeout(3)