1: \ chains.fs execution chains for gforth 21jun97jaw
2:
3: 0 [IF]
4: This defines execution chains.
5: The first application for this is building initialization chains:
6: Think of many modules or program parts, each of it with some specific
7: initialization code. If we hardcode the initialization routines into a
8: "master-init" we will get unflexible and are not able only to load some
9: specific modules...
10:
11: The chain is basicaly a linked-list. Define a Variable for the head of
12: linked-list. Name it "foo8" or "foo-chain" to indicate it is a execution
13: chain.
14:
15: You can add a word to the list with "' my-init foo8 chained". You can
16: execute all the code with "foo8 chainperform".
17: [THEN]
18:
19: [IFUNDEF] linked
20: : linked here over @ a, swap ! ;
21: [THEN]
22:
23: \ generic chains
24:
25: : chained ( xt list -- ) \ gforth
26: linked , ;
27:
28: : chainperform ( list -- ) \ gforth
29: BEGIN @ dup WHILE dup cell+ perform REPEAT drop ;
30:
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