NAME

       io_setcookie - associate cookie with descriptor

SYNTAX

       #include <io.h>

       void io_setcookie(int64 fd,void* cookie);

DESCRIPTION

       io_setcookie  associates  a  cookie  (pointer  to some anonymous data structure) with this
       descriptor.  Only one cookie can be associated with a descriptor.

       Use io_getcookie(3) to retrieve the cookie for a descriptor (usually after  io_canread  or
       io_canwrite brought it to your attention).

       Please note that io_close does not deallocate your cookie.  You need to do that yourself.

       The  idea is that you put the state associated with a TCP connection you serve in a common
       struct.  Then you do not need to have your own data structure to retrieve the state for  a
       connection,  you  can  just  use the data structure io_wait already maintains.  The lookup
       works in constant time and should not cause any cache misses.

SEE ALSO

       io_wait(3), io_getcookie(3)

                                                                                  io_setcookie(3)