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| 1 : | jwilke | 1.1 | \ chains.fs execution chains for gforth 21jun97jaw |
| 2 : | |||
| 3 : | anton | 1.3 | \ Copyright (C) 1998 Free Software Foundation, Inc. |
| 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 | ||
| 9 : | \ as published by the Free Software Foundation; either version 2 | ||
| 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 | ||
| 18 : | \ along with this program; if not, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 20 : | |||
| 21 : | jwilke | 1.1 | 0 [IF] |
| 22 : | This defines execution chains. | ||
| 23 : | The first application for this is building initialization chains: | ||
| 24 : | Think of many modules or program parts, each of it with some specific | ||
| 25 : | initialization code. If we hardcode the initialization routines into a | ||
| 26 : | "master-init" we will get unflexible and are not able only to load some | ||
| 27 : | specific modules... | ||
| 28 : | |||
| 29 : | The chain is basicaly a linked-list. Define a Variable for the head of | ||
| 30 : | linked-list. Name it "foo8" or "foo-chain" to indicate it is a execution | ||
| 31 : | chain. | ||
| 32 : | |||
| 33 : | You can add a word to the list with "' my-init foo8 chained". You can | ||
| 34 : | execute all the code with "foo8 chainperform". | ||
| 35 : | [THEN] | ||
| 36 : | |||
| 37 : | pazsan | 1.2 | has? cross |
| 38 : | [IF] e? compiler | ||
| 39 : | [ELSE] true | ||
| 40 : | [THEN] | ||
| 41 : | |||
| 42 : | [IF] \ only needed with compiler | ||
| 43 : | |||
| 44 : | jwilke | 1.1 | [IFUNDEF] linked |
| 45 : | : linked here over @ a, swap ! ; | ||
| 46 : | [THEN] | ||
| 47 : | |||
| 48 : | \ generic chains | ||
| 49 : | |||
| 50 : | : chained ( xt list -- ) \ gforth | ||
| 51 : | linked , ; | ||
| 52 : | pazsan | 1.2 | |
| 53 : | [THEN] | ||
| 54 : | jwilke | 1.1 | |
| 55 : | : chainperform ( list -- ) \ gforth | ||
| 56 : | BEGIN @ dup WHILE dup cell+ perform REPEAT drop ; | ||
| 57 : |
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