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- /*
- C BASED FORTH-83 MULTI-TASKING KERNEL: DOUBLE LINKED LIST
-
- Copyright (C) 1990 by Mikael R.K. Patel
-
- Computer Aided Design Laboratory (CADLAB)
- Department of Computer and Information Science
- Linkoping University
- S-581 83 LINKOPING
- SWEDEN
-
- Email: mip@ida.liu.se
-
- Started on: 12 April 1990
-
- Last updated on: 26 June 1990
-
- Dependencies:
- (cc) kernel.c, kernel.h
-
- Description:
- Double linked list (queues) extension vocabulary for the tile
- forth multi-tasking kernel.
-
- Copying:
- This program 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 1, or (at your option)
- any later version.
-
- This program 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.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- */
-
- VOID doqemptyqueue()
- {
- compare(== ((INT32) tos.QUEUE -> succ), INT32);
- }
-
- NORMAL_CODE(qemptyqueue, forth, "?empty-queue", doqemptyqueue);
-
- VOID doenqueue()
- {
- register QUEUE t, q;
-
- q = spop(QUEUE);
- t = spop(QUEUE);
-
- t -> pred = q -> pred;
- t -> succ = q;
-
- q -> pred -> succ = t;
- q -> pred = t;
- }
-
- NORMAL_CODE(enqueue, qemptyqueue, "enqueue", doenqueue);
-
- VOID dodequeue()
- {
- register QUEUE t;
-
- t = spop(QUEUE);
-
- t -> succ -> pred = t -> pred;
- t -> pred -> succ = t -> succ;
-
- t -> succ = t -> pred = t;
- }
-
- NORMAL_CODE(dequeue, enqueue, "dequeue", dodequeue);
-
-