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(* RTdata.def provides a mechanism whereby devices can attach data.
Copyright (C) 2008-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. *)
DEFINITION MODULE RTdata ;
(*
Title : RTdata
Author : Gaius Mulley
System : GNU Modula-2
Date : Fri Sep 26 17:19:15 2008
Revision : $Version$
Description: provides a mechanism whereby devices can store
data attached to a device.
*)
FROM SYSTEM IMPORT ADDRESS ;
FROM IOLink IMPORT DeviceTablePtr ;
TYPE
ModuleId ;
FreeProcedure = PROCEDURE (ADDRESS) ;
(*
MakeModuleId - creates a unique module Id.
*)
PROCEDURE MakeModuleId (VAR m: ModuleId) ;
(*
InitData - adds, datum, to the device, d. The datum
is associated with ModuleID, m.
*)
PROCEDURE InitData (d: DeviceTablePtr; m: ModuleId;
datum: ADDRESS; f: FreeProcedure) ;
(*
GetData - returns the datum assocated with ModuleId, m.
*)
PROCEDURE GetData (d: DeviceTablePtr; m: ModuleId) : ADDRESS ;
(*
KillData - destroys the datum associated with ModuleId, m,
in device, d. It invokes the free procedure
given during InitData.
*)
PROCEDURE KillData (d: DeviceTablePtr; m: ModuleId) ;
END RTdata.
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