Annotation of gforth/chains.fs, revision 1.8
1.1 jwilke 1: \ chains.fs execution chains for gforth 21jun97jaw
2:
1.8 ! anton 3: \ Copyright (C) 1998,2000,2003,2007 Free Software Foundation, Inc.
1.3 anton 4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
1.7 anton 9: \ as published by the Free Software Foundation, either version 3
1.3 anton 10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
1.7 anton 18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.3 anton 19:
1.1 jwilke 20: 0 [IF]
21: This defines execution chains.
22: The first application for this is building initialization chains:
23: Think of many modules or program parts, each of it with some specific
24: initialization code. If we hardcode the initialization routines into a
25: "master-init" we will get unflexible and are not able only to load some
26: specific modules...
27:
28: The chain is basicaly a linked-list. Define a Variable for the head of
29: linked-list. Name it "foo8" or "foo-chain" to indicate it is a execution
30: chain.
31:
32: You can add a word to the list with "' my-init foo8 chained". You can
33: execute all the code with "foo8 chainperform".
34: [THEN]
35:
1.2 pazsan 36: has? cross
37: [IF] e? compiler
38: [ELSE] true
39: [THEN]
40:
41: [IF] \ only needed with compiler
42:
1.1 jwilke 43: [IFUNDEF] linked
44: : linked here over @ a, swap ! ;
45: [THEN]
46:
47: \ generic chains
48:
49: : chained ( xt list -- ) \ gforth
50: linked , ;
1.2 pazsan 51:
52: [THEN]
1.1 jwilke 53:
54: : chainperform ( list -- ) \ gforth
55: BEGIN @ dup WHILE dup cell+ perform REPEAT drop ;
56:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>