1 (* RTio.mod implements low level routines for creating and destroying ChanIds.
3 Copyright (C) 2008-2024 Free Software Foundation, Inc.
4 Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
6 This file is part of GNU Modula-2.
8 GNU Modula-2 is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GNU Modula-2 is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 Under Section 7 of GPL version 3, you are granted additional
19 permissions described in the GCC Runtime Library Exception, version
20 3.1, as published by the Free Software Foundation.
22 You should have received a copy of the GNU General Public License and
23 a copy of the GCC Runtime Library Exception along with this program;
24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 <http://www.gnu.org/licenses/>. *)
27 IMPLEMENTATION MODULE RTio
;
29 FROM Storage
IMPORT ALLOCATE
, DEALLOCATE
;
33 ChanId
= POINTER TO RECORD
34 did
: IOLink.DeviceId
;
35 dtp
: IOLink.DeviceTablePtr
;
41 InitChanId - return a new ChanId.
44 PROCEDURE InitChanId () : ChanId
;
54 InitChanId - deallocate a ChanId.
57 PROCEDURE KillChanId (c
: ChanId
) : ChanId
;
65 NilChanId - return a NIL pointer.
68 PROCEDURE NilChanId () : ChanId
;
75 GetDeviceId - returns the device id, from, c.
78 PROCEDURE GetDeviceId (c
: ChanId
) : IOLink.DeviceId
;
85 SetDeviceId - returns the device id, from, c.
88 PROCEDURE SetDeviceId (c
: ChanId
; d
: IOLink.DeviceId
) ;
95 GetDevicePtr - returns the device table ptr, from, c.
98 PROCEDURE GetDevicePtr (c
: ChanId
) : IOLink.DeviceTablePtr
;
104 SetDevicePtr - sets the device table ptr in, c.
107 PROCEDURE SetDevicePtr (c
: ChanId
; p
: IOLink.DeviceTablePtr
) ;
114 GetFile - returns the file field from, c.
117 PROCEDURE GetFile (c
: ChanId
) : FIO.File
;
124 SetFile - sets the file field in, c.
127 PROCEDURE SetFile (c
: ChanId
; f
: FIO.File
) ;