The GNU Modula-2 front end to GCC

gm2-libs-iso/ErrnoCategory

DEFINITION MODULE ErrnoCategory ;

(*
    Description: provides an interface to errno (if the system
                 supports it) which determines whether the current
                 errno is a hard or soft error.  These distinctions
                 are needed by the ISO Modula-2 libraries.  Not all
                 errno values are tested, only those which could be
                 related to a device.
*)

IMPORT ChanConsts ;


(*
   IsErrnoHard - returns TRUE if the value of errno is associated with
                 a hard device error.
*)


PROCEDURE IsErrnoHard (e: INTEGER) : BOOLEAN ;


(*
   IsErrnoSoft - returns TRUE if the value of errno is associated with
                 a soft device error.
*)


PROCEDURE IsErrnoSoft (e: INTEGER) : BOOLEAN ;


(*
   UnAvailable - returns TRUE if the value of errno indicates that
                 the resource or device is unavailable for some
                 reason.
*)


PROCEDURE UnAvailable (e: INTEGER) : BOOLEAN ;


(*
   GetOpenResults - maps errno onto the ISO Modula-2 enumerated
                    type, OpenResults.
*)


PROCEDURE GetOpenResults (e: INTEGER) : ChanConsts.OpenResults ;


END ErrnoCategory.