gm2-libs-iso/RTio

DEFINITION MODULE RTio ;

(*
    Description: provides low level routines for creating and destroying
                 ChanIds.  This is necessary to allow multiple modules
                 to create, ChanId values, where ChanId is an opaque
                 type.
*)

IMPORT FIO, IOLink ;

TYPE
ChanId (type)
   ChanId ;

(*
   InitChanId - return a new ChanId.
*)

InitChanId
PROCEDURE InitChanId () : ChanId ;

(*
   KillChanId - deallocate a ChanId.
*)

KillChanId
PROCEDURE KillChanId (c: ChanId) : ChanId ;

(*
   NilChanId - return a NIL pointer.
*)

NilChanId
PROCEDURE NilChanId () : ChanId ;

(*
   GetDeviceId - returns the device id, from, c.
*)

GetDeviceId
PROCEDURE GetDeviceId (c: ChanId) : IOLink.DeviceId ;

(*
   SetDeviceId - sets the device id in, c.
*)

SetDeviceId
PROCEDURE SetDeviceId (c: ChanId; d: IOLink.DeviceId) ;

(*
   GetDevicePtr - returns the device table ptr, from, c.
*)

GetDevicePtr
PROCEDURE GetDevicePtr (c: ChanId) : IOLink.DeviceTablePtr ;

(*
   SetDevicePtr - sets the device table ptr in, c.
*)

SetDevicePtr
PROCEDURE SetDevicePtr (c: ChanId; p: IOLink.DeviceTablePtr) ;

(*
   GetFile - returns the file field from, c.
*)

GetFile
PROCEDURE GetFile (c: ChanId) : FIO.File ;

(*
   SetFile - sets the file field in, c.
*)

SetFile
PROCEDURE SetFile (c: ChanId; f: FIO.File) ;

END RTio.