1: \ libcc.fs foreign function interface implemented using a C compiler
2:
3: \ Copyright (C) 2006,2007,2008,2009,2010,2011 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 3
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, see http://www.gnu.org/licenses/.
19:
20:
21: \ What this implementation does is this: if it sees a declaration like
22:
23: \ \ something that tells it that the current library is libc
24: \ \c #include <unistd.h>
25: \ c-function dlseek lseek n d n -- d
26:
27: \ it genererates C code similar to the following:
28:
29: \ #include <gforth.h>
30: \ #include <unistd.h>
31: \
32: \ void gforth_c_lseek_ndn_d(void)
33: \ {
34: \ Cell *sp = gforth_SP;
35: \ Float *fp = gforth_FP;
36: \ long long result; /* longest type in C */
37: \ gforth_ll2d(lseek(sp[3],gforth_d2ll(sp[2],sp[1]),sp[0]),sp[3],sp[2]);
38: \ gforth_SP = sp+2;
39: \ }
40:
41: \ Then it compiles this code and dynamically links it into the Gforth
42: \ system (batching and caching are future work). It also dynamically
43: \ links lseek. Performing DLSEEK then puts the function pointer of
44: \ the function pointer of gforth_c_lseek_ndn_d on the stack and
45: \ calls CALL-C.
46:
47: \ ToDo:
48:
49: \ Batching, caching and lazy evaluation:
50:
51: \ Batching:
52:
53: \ New words are deferred, and the corresponding C functions are
54: \ collected in one file, until the first word is EXECUTEd; then the
55: \ file is compiled and linked into the system, and the word is
56: \ resolved.
57:
58: \ Caching:
59:
60: \ Instead of compiling all this stuff anew for every execution, we
61: \ keep the files around and have an index file containing the function
62: \ names and their corresponding .so files. If the needed wrapper name
63: \ is already present, it is just linked instead of generating the
64: \ wrapper again. This is all done by loading the index file(s?),
65: \ which define words for the wrappers in a separate wordlist.
66:
67: \ The files are built in .../lib/gforth$ARCH/$VERSION/libcc/ or
68: \ ~/.gforth$ARCH/libcc/$HOST/.
69:
70: \ Todo: conversion between function pointers and xts (both directions)
71:
72: \ taking an xt and turning it into a function pointer:
73:
74: \ e.g., assume we have the xt of + and want to create a C function int
75: \ gforth_callback_plus(int, int), and then pass the pointer to that
76: \ function:
77:
78: \ There should be Forth code like this:
79: \ ] + 0 (bye)
80: \ Assume that the start of this code is START
81:
82: \ Now, there should be a C function:
83:
84: \ int gforth_callback_plus(int p1, int p2)
85: \ {
86: \ Cell *sp = gforth_SP;
87: \ Float *fp = gforth_FP;
88: \ Float *fp = gforth_FP;
89: \ Address lp = gforth_LP;
90: \ sp -= 2;
91: \ sp[0] = p1;
92: \ sp[1] = p2;
93: \ gforth_engine(START, sp, rp, fp, lp);
94: \ sp += 1;
95: \ gforth_RP = rp;
96: \ gforth_SP = sp;
97: \ gforth_FP = fp;
98: \ gforth_LP = lp;
99: \ return sp[0];
100: \ }
101:
102: \ and the pointer to that function is the C function pointer for the XT of +.
103:
104: \ Future problems:
105: \ how to combine the Forth code generation with inlining
106: \ START is not a constant across executions (when caching the C files)
107: \ Solution: make START a variable, and store into it on startup with dlsym
108:
109: \ Syntax:
110: \ callback <rettype> <params> <paramtypes> -- <rettype>
111:
112:
113: \ data structures
114:
115: \ For every c-function, we have three words: two anonymous words
116: \ created by c-function-ft (first time) and c-function-rt (run-time),
117: \ and a named deferred word. The deferred word first points to the
118: \ first-time word, then to the run-time word; the run-time word calls
119: \ the c function.
120:
121: [ifundef] parse-name
122: ' parse-word alias parse-name
123: [then]
124: [ifundef] defer!
125: : defer! ( xt xt-deferred -- ) \ gforth defer-store
126: \G Changes the @code{defer}red word @var{xt-deferred} to execute @var{xt}.
127: >body [ has? rom [IF] ] @ [ [THEN] ] ! ;
128: [then]
129:
130: \ : delete-file 2drop 0 ;
131:
132: require struct.fs
133: require mkdir.fs
134:
135: \ c-function-ft word body:
136: struct
137: cell% field cff-cfr \ xt of c-function-rt word
138: cell% field cff-deferred \ xt of c-function deferred word
139: cell% field cff-lha \ address of the lib-handle for the lib that
140: \ contains the wrapper function of the word
141: char% field cff-ctype \ call type (function=1, value=0)
142: char% field cff-rtype \ return type
143: char% field cff-np \ number of parameters
144: 1 0 field cff-ptypes \ #npar parameter types
145: \ counted string: c-name
146: end-struct cff%
147:
148: variable c-source-file-id \ contains the source file id of the current batch
149: 0 c-source-file-id !
150: variable lib-handle-addr \ points to the library handle of the current batch.
151: \ the library handle is 0 if the current
152: \ batch is not yet compiled.
153: here 0 , lib-handle-addr ! \ just make sure LIB-HANDLE always works
154: 2variable lib-filename \ filename without extension
155: 2variable lib-modulename \ basename of the file without extension
156: 2variable libcc-named-dir-v \ directory for named libcc wrapper libraries
157: Variable libcc-path \ pointer to path of library directories
158:
159: defer replace-rpath ( c-addr1 u1 -- c-addr2 u2 )
160: ' noop is replace-rpath
161:
162: : .nb ( n -- )
163: 0 .r ;
164:
165: : const+ ( n1 "name" -- n2 )
166: dup constant 1+ ;
167:
168: : front-string { c-addr1 u1 c-addr2 u2 -- c-addr3 u3 }
169: \ insert string c-addr2 u2 in buffer c-addr1 u1; c-addr3 u3 is the
170: \ remainder of the buffer.
171: assert( u1 u2 u>= )
172: c-addr2 c-addr1 u2 move
173: c-addr1 u1 u2 /string ;
174:
175: : front-char { c-addr1 u1 c -- c-addr3 u2 }
176: \ insert c in buffer c-addr1 u1; c-addr3 u3 is the remainder of
177: \ the buffer.
178: assert( u1 0 u> )
179: c c-addr1 c!
180: c-addr1 u1 1 /string ;
181:
182: : s+ { addr1 u1 addr2 u2 -- addr u }
183: u1 u2 + allocate throw { addr }
184: addr1 addr u1 move
185: addr2 addr u1 + u2 move
186: addr u1 u2 +
187: ;
188:
189: : append { addr1 u1 addr2 u2 -- addr u }
190: addr1 u1 u2 + dup { u } resize throw { addr }
191: addr2 addr u1 + u2 move
192: addr u ;
193:
194: \ linked list stuff (should go elsewhere)
195:
196: struct
197: cell% field list-next
198: 1 0 field list-payload
199: end-struct list%
200:
201: : list-insert { node list -- }
202: list list-next @ node list-next !
203: node list list-next ! ;
204:
205: : list-append { node endlistp -- }
206: \ insert node at place pointed to by endlistp
207: node endlistp @ list-insert
208: node list-next endlistp ! ;
209:
210: : list-map ( ... list xt -- ... )
211: \ xt ( ... node -- ... )
212: { xt } begin { node }
213: node while
214: node xt execute
215: node list-next @
216: repeat ;
217:
218: 2variable c-libs \ library names in a string (without "lib")
219:
220: : lib-prefix ( -- addr u ) s" libgf" ;
221:
222: : add-lib ( c-addr u -- ) \ gforth
223: \G Add library lib@i{string} to the list of libraries, where
224: \G @i{string} is represented by @i{c-addr u}.
225: c-libs 2@ d0= IF 0 allocate throw 0 c-libs 2! THEN
226: c-libs 2@ s" -l" append 2swap append c-libs 2! ;
227:
228: : add-libpath ( c-addr u -- ) \ gforth
229: \G Add path @i{string} to the list of library search pathes, where
230: \G @i{string} is represented by @i{c-addr u}.
231: c-libs 2@ d0= IF 0 allocate throw 0 c-libs 2! THEN
232: c-libs 2@ s" -L" append 2swap append c-libs 2! ;
233:
234: \ C prefix lines
235:
236: \ linked list of longcstrings: [ link | count-cell | characters ]
237:
238: list%
239: cell% field c-prefix-count
240: 1 0 field c-prefix-chars
241: end-struct c-prefix%
242:
243: variable c-prefix-lines 0 c-prefix-lines !
244: variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end !
245:
246: : print-c-prefix-line ( node -- )
247: dup c-prefix-chars swap c-prefix-count @ type cr ;
248:
249: : print-c-prefix-lines ( -- )
250: c-prefix-lines @ ['] print-c-prefix-line list-map ;
251:
252: : write-c-prefix-line ( c-addr u -- )
253: c-source-file-id @ dup if
254: write-line throw
255: else
256: drop 2drop
257: then ;
258:
259: : save-c-prefix-line1 ( c-addr u -- )
260: 2dup write-c-prefix-line
261: align here 0 , c-prefix-lines-end list-append ( c-addr u )
262: longstring, ;
263:
264: defer save-c-prefix-line ( c-addr u -- )
265: ' save-c-prefix-line1 is save-c-prefix-line
266:
267: : \c ( "rest-of-line" -- ) \ gforth backslash-c
268: \G One line of C declarations for the C interface
269: -1 parse save-c-prefix-line ;
270:
271: s" #include <gforth" arch-modifier s+ s" /" append version-string append s" /libcc.h>" append ( c-addr u )
272: 2dup save-c-prefix-line drop free throw
273:
274: \ Types (for parsing)
275:
276: wordlist constant libcc-types
277:
278: get-current libcc-types set-current
279:
280: \ index values
281: -1
282: const+ -- \ end of arguments
283: const+ n \ integer cell
284: const+ a \ address cell
285: const+ d \ double
286: const+ r \ float
287: const+ func \ C function pointer
288: const+ void
289: drop
290:
291: set-current
292:
293: \ call types
294: 0
295: const+ c-func
296: const+ c-val
297: const+ c-var
298: drop
299:
300: : libcc-type ( c-addr u -- u2 )
301: libcc-types search-wordlist 0= -13 and throw execute ;
302:
303: : parse-libcc-type ( "libcc-type" -- u ) parse-name libcc-type ;
304:
305: : parse-return-type ( "libcc-type" -- u )
306: parse-libcc-type dup 0< -32 and throw ;
307:
308: : parse-function-types ( "{libcc-type}" "--" "libcc-type" -- addr )
309: c-func c, here
310: dup 2 chars allot here begin
311: parse-libcc-type dup 0>= while
312: c,
313: repeat
314: drop here swap - over char+ c!
315: parse-return-type swap c! ;
316:
317: : parse-value-type ( "{--}" "libcc-type" -- addr )
318: c-val c, here
319: parse-libcc-type dup 0< if drop parse-return-type then
320: c, 0 c, ;
321:
322: : parse-variable-type ( -- addr )
323: c-var c, here
324: s" a" libcc-type c, 0 c, ;
325:
326: 0 Value is-funptr?
327: : parse-funptr-types ( "{libcc-type}" "--" "libcc-type" -- addr )
328: true to is-funptr? parse-function-types ;
329:
330: : type-letter ( n -- c )
331: chars s" nadrfv" drop + c@ ;
332:
333: \ count-stacks
334:
335: : count-stacks-n ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
336: 1+ ;
337:
338: : count-stacks-a ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
339: 1+ ;
340:
341: : count-stacks-d ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
342: 2 + ;
343:
344: : count-stacks-r ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
345: swap 1+ swap ;
346:
347: : count-stacks-func ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
348: 1+ ;
349:
350: : count-stacks-void ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
351: ;
352:
353: create count-stacks-types
354: ' count-stacks-n ,
355: ' count-stacks-a ,
356: ' count-stacks-d ,
357: ' count-stacks-r ,
358: ' count-stacks-func ,
359: ' count-stacks-void ,
360:
361: : count-stacks ( pars -- fp-change sp-change )
362: \ pars is an addr u pair
363: 0 0 2swap over + swap u+do
364: i c@ cells count-stacks-types + @ execute
365: loop ;
366:
367: \ gen-pars
368:
369: : gen-par-n ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
370: ." sp[" 1- dup .nb ." ]" ;
371:
372: : gen-par-a ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
373: ." (void *)(" gen-par-n ." )" ;
374:
375: : gen-par-d ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
376: ." gforth_d2ll(" gen-par-n ." ," gen-par-n ." )" ;
377:
378: : gen-par-r ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
379: swap 1- tuck ." fp[" .nb ." ]" ;
380:
381: : gen-par-func ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
382: gen-par-a ;
383:
384: : gen-par-void ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
385: -32 throw ;
386:
387: create gen-par-types
388: ' gen-par-n ,
389: ' gen-par-a ,
390: ' gen-par-d ,
391: ' gen-par-r ,
392: ' gen-par-func ,
393: ' gen-par-void ,
394:
395: : gen-par ( fp-depth1 sp-depth1 partype -- fp-depth2 sp-depth2 )
396: cells gen-par-types + @ execute ;
397:
398: \ the call itself
399:
400: : gen-wrapped-func { d: pars d: c-name fp-change1 sp-change1 -- }
401: c-name type ." ("
402: fp-change1 sp-change1 pars over + swap u+do
403: i c@ gen-par
404: i 1+ i' < if
405: ." ,"
406: endif
407: loop
408: 2drop ." )" ;
409:
410: : gen-wrapped-const { d: pars d: c-name fp-change1 sp-change1 -- }
411: ." (" c-name type ." )" ;
412:
413: : gen-wrapped-var { d: pars d: c-name fp-change1 sp-change1 -- }
414: ." &(" c-name type ." )" ;
415:
416: create gen-call-types
417: ' gen-wrapped-func ,
418: ' gen-wrapped-const ,
419: ' gen-wrapped-var ,
420:
421: : gen-wrapped-call ( pars c-name fp-change1 sp-change1 -- )
422: 5 pick 3 chars - c@ cells gen-call-types + @ execute ;
423:
424: \ calls for various kinds of return values
425:
426: : gen-wrapped-void ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
427: 2dup 2>r gen-wrapped-call 2r> ;
428:
429: : gen-wrapped-n ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
430: 2dup gen-par-n 2>r ." =" gen-wrapped-call 2r> ;
431:
432: : gen-wrapped-a ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
433: 2dup gen-par-n 2>r ." =(Cell)" gen-wrapped-call 2r> ;
434:
435: : gen-wrapped-d ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
436: ." gforth_ll2d(" gen-wrapped-void
437: ." ," gen-par-n ." ," gen-par-n ." )" ;
438:
439: : gen-wrapped-r ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
440: 2dup gen-par-r 2>r ." =" gen-wrapped-call 2r> ;
441:
442: : gen-wrapped-func ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
443: gen-wrapped-a ;
444:
445: create gen-wrapped-types
446: ' gen-wrapped-n ,
447: ' gen-wrapped-a ,
448: ' gen-wrapped-d ,
449: ' gen-wrapped-r ,
450: ' gen-wrapped-func ,
451: ' gen-wrapped-void ,
452:
453: : gen-wrapped-stmt ( pars c-name fp-change1 sp-change1 ret -- fp-change sp-change )
454: cells gen-wrapped-types + @ execute ;
455:
456: : sanitize ( addr u -- )
457: bounds ?DO
458: I c@
459: dup 'a' 'z' 1+ within
460: over 'A' 'Z' 1+ within or
461: over '0' '9' 1+ within or
462: swap '_' = or 0= IF '_' I c! THEN
463: LOOP ;
464:
465: : wrapper-function-name ( addr -- c-addr u )
466: \ addr points to the return type index of a c-function descriptor
467: count { r-type } count { d: pars }
468: pars + count { d: c-name }
469: s" gforth_c_" { d: prefix }
470: prefix nip c-name nip + pars nip + 3 + { u }
471: u allocate throw { c-addr }
472: c-addr u
473: prefix front-string c-name front-string '_ front-char
474: pars bounds u+do
475: i c@ type-letter front-char
476: loop
477: '_ front-char r-type type-letter front-char assert( dup 0= )
478: 2drop c-addr u 2dup sanitize ;
479:
480: : gen-wrapper-function ( addr -- )
481: \ addr points to the return type index of a c-function descriptor
482: dup { descriptor }
483: count { ret } count 2dup { d: pars } chars + count { d: c-name }
484: ." void "
485: [ lib-suffix s" .la" str= [IF] ] lib-prefix type lib-modulename 2@ type ." _LTX_" [ [THEN] ]
486: descriptor wrapper-function-name 2dup type drop free throw
487: .\" (GFORTH_ARGS)\n"
488: .\" {\n Cell MAYBE_UNUSED *sp = gforth_SP;\n Float MAYBE_UNUSED *fp = gforth_FP;\n "
489: is-funptr? IF .\" Cell ptr = *sp++;\n " 0 to is-funptr? THEN
490: pars c-name 2over count-stacks ret gen-wrapped-stmt .\" ;\n"
491: ?dup-if
492: ." gforth_SP = sp+" .nb .\" ;\n"
493: endif
494: ?dup-if
495: ." gforth_FP = fp+" .nb .\" ;\n"
496: endif
497: .\" }\n" ;
498:
499: : scan-back { c-addr u1 c -- c-addr u2 }
500: \ the last occurence of c in c-addr u1 is at u2-1; if it does not
501: \ occur, u2=0.
502: c-addr 1- c-addr u1 + 1- u-do
503: i c@ c = if
504: c-addr i over - 1+ unloop exit endif
505: 1 -loop
506: c-addr 0 ;
507:
508: : dirname ( c-addr1 u1 -- c-addr2 u2 )
509: \ directory name of the file name c-addr1 u1, including the final "/".
510: '/ scan-back ;
511:
512: : basename ( c-addr1 u1 -- c-addr2 u2 )
513: \ file name without directory component
514: 2dup dirname nip /string ;
515:
516: : gen-filename ( x -- c-addr u )
517: \ generates a file basename for lib-handle-addr X
518: 0 <<# ['] #s $10 base-execute #>
519: s" gforth_c_" 2swap s+ #>> ;
520:
521: : libcc-named-dir ( -- c-addr u )
522: libcc-named-dir-v 2@ ;
523:
524: : libcc-tmp-dir ( -- c-addr u )
525: s" ~/.gforth" arch-modifier s+ s" /libcc-tmp/" s+ ;
526:
527: : prepend-dirname ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 )
528: 2over s+ 2swap drop free throw ;
529:
530: : open-wrappers ( -- addr|0 )
531: lib-filename 2@ dirname lib-prefix s+
532: lib-filename 2@ basename append lib-suffix append
533: 2dup libcc-named-dir string-prefix? if ( c-addr u )
534: \ see if we can open it in the path
535: libcc-named-dir nip /string
536: libcc-path open-path-file if
537: 0 exit endif
538: ( wfile-id c-addr2 u2 ) rot close-file throw save-mem ( c-addr2 u2 )
539: endif
540: \ 2dup cr type
541: 2dup open-lib >r
542: drop free throw r> ;
543:
544: : c-library-name-setup ( c-addr u -- )
545: assert( c-source-file-id @ 0= )
546: { d: filename }
547: here 0 , lib-handle-addr ! filename lib-filename 2!
548: filename basename lib-modulename 2!
549: ['] write-c-prefix-line is save-c-prefix-line ;
550:
551: : c-library-name-create ( -- )
552: lib-filename 2@ s" .c" s+ 2dup w/o create-file throw
553: c-source-file-id !
554: drop free throw ;
555:
556: : c-named-library-name ( c-addr u -- )
557: \ set up filenames for a (possibly new) library; c-addr u is the
558: \ basename of the library
559: libcc-named-dir prepend-dirname c-library-name-setup
560: open-wrappers dup if
561: lib-handle-addr @ !
562: else
563: libcc-named-dir $1ff mkdir-parents drop
564: drop c-library-name-create
565: c-prefix-lines @ ['] print-c-prefix-line \ first line only
566: c-source-file-id @ outfile-execute
567: endif ;
568:
569: : c-tmp-library-name ( c-addr u -- )
570: \ set up filenames for a new library; c-addr u is the basename of
571: \ the library
572: libcc-tmp-dir 2dup $1ff mkdir-parents drop
573: prepend-dirname c-library-name-setup c-library-name-create
574: ['] print-c-prefix-lines c-source-file-id @ outfile-execute ;
575:
576: : lib-handle ( -- addr )
577: lib-handle-addr @ @ ;
578:
579: : init-c-source-file ( -- )
580: lib-handle 0= if
581: c-source-file-id @ 0= if
582: here gen-filename c-tmp-library-name
583: endif
584: endif ;
585:
586: : c-source-file ( -- file-id )
587: c-source-file-id @ assert( dup ) ;
588:
589: : notype-execute ( ... xt -- ... )
590: what's type { oldtype } try
591: ['] 2drop is type execute 0
592: restore
593: oldtype is type
594: endtry
595: throw ;
596:
597: : c-source-file-execute ( ... xt -- ... )
598: \ direct the output of xt to c-source-file, or nothing
599: lib-handle if
600: notype-execute
601: else
602: c-source-file outfile-execute
603: endif ;
604:
605: : .lib-error ( -- )
606: [ifdef] lib-error
607: ['] cr stderr outfile-execute
608: lib-error ['] type stderr outfile-execute
609: [then] ;
610:
611: DEFER compile-wrapper-function ( -- )
612: : compile-wrapper-function1 ( -- )
613: lib-handle 0= if
614: c-source-file close-file throw
615: 0 c-source-file-id !
616: [ libtool-command s" --silent --tag=CC --mode=compile " s+
617: libtool-cc append s" -I '" append
618: s" includedir" getenv append s" '" append ] sliteral
619: s" -O -c " s+ lib-filename 2@ append s" .c -o " append
620: lib-filename 2@ append s" .lo" append ( c-addr u )
621: \ 2dup type cr
622: 2dup system drop free throw $? abort" libtool compile failed"
623: [ libtool-command s" --silent --tag=CC --mode=link " s+
624: libtool-cc append libtool-flags append s" -module -rpath " s+ ] sliteral
625: lib-filename 2@ dirname replace-rpath s+ s" " append
626: lib-filename 2@ append s" .lo -o " append
627: lib-filename 2@ dirname append lib-prefix append
628: lib-filename 2@ basename append s" .la" append ( c-addr u )
629: c-libs 2@ append
630: \ 2dup type cr
631: 2dup system drop free throw $? abort" libtool link failed"
632: open-wrappers dup 0= if
633: .lib-error true abort" open-lib failed"
634: endif
635: ( lib-handle ) lib-handle-addr @ !
636: endif
637: lib-filename 2@ drop free throw 0 0 lib-filename 2! ;
638: ' compile-wrapper-function1 IS compile-wrapper-function
639: \ s" ar rcs xxx.a xxx.o" system
640: \ $? abort" ar generated error" ;
641:
642: : link-wrapper-function { cff -- sym }
643: cff cff-rtype wrapper-function-name { d: wrapper-name }
644: wrapper-name cff cff-lha @ @ assert( dup ) lib-sym dup 0= if
645: .lib-error -&32 throw
646: endif
647: wrapper-name drop free throw ;
648:
649: : c-function-ft ( xt-defr xt-cfr xt-parse "c-name" "type signature" -- )
650: \ build time/first time action for c-function
651: { xt-parse-types } init-c-source-file
652: noname create 2, lib-handle-addr @ ,
653: parse-name { d: c-name }
654: xt-parse-types execute c-name string,
655: ['] gen-wrapper-function c-source-file-execute
656: does> ( ... -- ... )
657: dup 2@ { xt-defer xt-cfr }
658: dup cff-lha @ @ 0= if
659: compile-wrapper-function
660: endif
661: link-wrapper-function xt-cfr >body !
662: xt-cfr xt-defer defer!
663: xt-cfr execute ;
664:
665: : c-function-rt ( -- )
666: \ run-time definition for c function; addr is the address where
667: \ the sym should be stored
668: noname create 0 ,
669: does> ( ... -- ... )
670: @ call-c ;
671:
672: : (c-function) ( xt-parse "forth-name" "c-name" "{stack effect}" -- )
673: { xt-parse-types } defer lastxt dup c-function-rt
674: lastxt xt-parse-types c-function-ft
675: lastxt swap defer! ;
676:
677: : c-function ( "forth-name" "c-name" "@{type@}" "---" "type" -- ) \ gforth
678: \G Define a Forth word @i{forth-name}. @i{Forth-name} has the
679: \G specified stack effect and calls the C function @code{c-name}.
680: ['] parse-function-types (c-function) ;
681:
682: : c-value ( "forth-name" "c-name" "---" "type" -- ) \ gforth
683: \G Define a Forth word @i{forth-name}. @i{Forth-name} has the
684: \G specified stack effect and gives the C value of @code{c-name}.
685: ['] parse-value-type (c-function) ;
686:
687: : c-variable ( "forth-name" "c-name" -- ) \ gforth
688: \G Define a Forth word @i{forth-name}. @i{Forth-name} returns the
689: \G address of @code{c-name}.
690: ['] parse-variable-type (c-function) ;
691:
692: : c-funptr ( "forth-name" "c-typecast" "@{type@}" "---" "type" -- ) \ gforth
693: \G Define a Forth word @i{forth-name}. @i{Forth-name} has the
694: \G specified stack effect and calls the C function pointer
695: \G ptr using the typecast or struct access @code{c-typecast}.
696: ['] parse-funptr-types (c-function) ;
697:
698: : clear-libs ( -- ) \ gforth
699: \G Clear the list of libs
700: c-source-file-id @ if
701: compile-wrapper-function
702: endif
703: 0. c-libs 2! ;
704: clear-libs
705:
706: : c-library-incomplete ( -- )
707: true abort" Called function of unfinished named C library" ;
708:
709: : c-library-name ( c-addr u -- ) \ gforth
710: \G Start a C library interface with name @i{c-addr u}.
711: clear-libs
712: ['] c-library-incomplete is compile-wrapper-function
713: c-named-library-name ;
714:
715: : c-library ( "name" -- ) \ gforth
716: \G Parsing version of @code{c-library-name}
717: parse-name save-mem c-library-name ;
718:
719: : end-c-library ( -- ) \ gforth
720: \G Finish and (if necessary) build the latest C library interface.
721: ['] save-c-prefix-line1 is save-c-prefix-line
722: ['] compile-wrapper-function1 is compile-wrapper-function
723: compile-wrapper-function1 ;
724:
725: : init-libcc ( -- )
726: s" ~/.gforth" arch-modifier s+ s" /libcc-named/" s+ libcc-named-dir-v 2!
727: [IFDEF] $init
728: libcc-path $init
729: libcc-named-dir libcc-path also-path
730: [ s" libccdir" getenv ] sliteral libcc-path also-path
731: [THEN]
732: ;
733:
734: init-libcc
735:
736: :noname ( -- )
737: defers 'cold
738: init-libcc ;
739: is 'cold
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to libcc.fs CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [gforth] / gforth