gm2-libs/Selective

DEFINITION MODULE Selective ;

FROM SYSTEM IMPORT ADDRESS ;

EXPORT QUALIFIED SetOfFd, Timeval,
                 InitSet, KillSet, InitTime, KillTime,
                 GetTime, SetTime,
                 FdZero, FdSet, FdClr, FdIsSet, Select,
                 MaxFdsPlusOne, WriteCharRaw, ReadCharRaw,
                 GetTimeOfDay ;

TYPE
SetOfFd (type)
   SetOfFd = ADDRESS ;    (* Hidden type in Selective.c *)
Timeval (type)
   Timeval = ADDRESS ;    (* Hidden type in Selective.c *)

Select
PROCEDURE Select (nooffds: CARDINAL;
                  readfds, writefds, exceptfds: SetOfFd;
                  timeout: Timeval) : INTEGER ;

InitTime
PROCEDURE InitTime (sec, usec: CARDINAL) : Timeval ;
KillTime
PROCEDURE KillTime (t: Timeval) : Timeval ;
GetTime
PROCEDURE GetTime (t: Timeval; VAR sec, usec: CARDINAL) ;
SetTime
PROCEDURE SetTime (t: Timeval; sec, usec: CARDINAL) ;
InitSet
PROCEDURE InitSet () : SetOfFd ;
KillSet
PROCEDURE KillSet (s: SetOfFd) : SetOfFd ;
FdZero
PROCEDURE FdZero (s: SetOfFd) ;
FdSet
PROCEDURE FdSet (fd: INTEGER; s: SetOfFd) ;
FdClr
PROCEDURE FdClr (fd: INTEGER; s: SetOfFd) ;
FdIsSet
PROCEDURE FdIsSet (fd: INTEGER; s: SetOfFd) : BOOLEAN ;
MaxFdsPlusOne
PROCEDURE MaxFdsPlusOne (a, b: INTEGER) : INTEGER ;

(* you must use the raw routines with select - not the FIO buffered routines *)
WriteCharRaw
PROCEDURE WriteCharRaw (fd: INTEGER; ch: CHAR) ;
ReadCharRaw
PROCEDURE ReadCharRaw (fd: INTEGER) : CHAR ;

(*
   GetTimeOfDay - fills in a record, Timeval, filled in with the
                  current system time in seconds and microseconds.
                  It returns zero (see man 3p gettimeofday)
*)

GetTimeOfDay
PROCEDURE GetTimeOfDay (tv: Timeval) : INTEGER ;

END Selective.