1: \ libffi.fs shared library support package 14aug05py
2:
3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2005,2006,2007 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: \ replacements for former primitives
21: \ note that the API functions have their arguments reversed and other
22: \ deviations.
23:
24: require libcc.fs
25:
26: c-library libffi
27: s" ffi" add-lib
28:
29: s" os-type" environment? [IF] s" darwin" string-prefix?
30: [IF]
31: \c #define MACOSX
32: \c #include <ffi/ffi.h>
33: [ELSE]
34: \c #include <ffi.h>
35: [THEN]
36: [ELSE]
37: \c #include <ffi.h>
38: [THEN]
39: \c extern Cell *gforth_RP;
40: \c extern unsigned char *gforth_LP;
41: \c static void **gforth_clist;
42: \c static void *gforth_ritem;
43: \c typedef void *Label;
44: \c typedef Label *Xt;
45: \c Label *gforth_engine(Xt *ip, Cell *sp, Cell *rp0, Float *fp, unsigned char *lp);
46: \c static void gforth_callback_ffi(ffi_cif * cif, void * resp, void ** args, void * ip)
47: \c {
48: \c Cell *rp1 = gforth_RP;
49: \c Cell *sp = gforth_SP;
50: \c Float *fp = gforth_FP;
51: \c unsigned char *lp = gforth_LP;
52: \c void ** clist = gforth_clist;
53: \c void * ritem = gforth_ritem;
54: \c
55: \c gforth_clist = args;
56: \c gforth_ritem = resp;
57: \c
58: \c gforth_engine((Xt *)ip, sp, rp1, fp, lp);
59: \c
60: \c /* restore global variables */
61: \c gforth_RP = rp1;
62: \c gforth_SP = sp;
63: \c gforth_FP = fp;
64: \c gforth_LP = lp;
65: \c gforth_clist = clist;
66: \c gforth_ritem = ritem;
67: \c }
68:
69: \c static void* ffi_types[] =
70: \c { &ffi_type_void,
71: \c &ffi_type_uint8, &ffi_type_sint8,
72: \c &ffi_type_uint16, &ffi_type_sint16,
73: \c &ffi_type_uint32, &ffi_type_sint32,
74: \c &ffi_type_uint64, &ffi_type_sint64,
75: \c &ffi_type_float, &ffi_type_double, &ffi_type_longdouble,
76: \c &ffi_type_pointer };
77: \c #define ffi_type(n) (ffi_types[n])
78: c-function ffi-type ffi_type n -- a
79:
80: \c static int ffi_sizes[] = { sizeof(ffi_cif), sizeof(ffi_closure) };
81: \c #define ffi_size(n1) (ffi_sizes[n1])
82: c-function ffi-size ffi_size n -- n
83:
84: \c #define ffi_prep_cif1(atypes, n, rtype, cif) \
85: \c ffi_prep_cif((ffi_cif *)cif, FFI_DEFAULT_ABI, n, \
86: \c (ffi_type *)rtype, (ffi_type **)atypes)
87: c-function ffi-prep-cif ffi_prep_cif1 a n a a -- n
88:
89: \c #define ffi_call1(a_avalues, a_rvalue ,a_ip ,a_cif) \
90: \c ffi_call((ffi_cif *)a_cif, (void(*)())a_ip, \
91: \c (void *)a_rvalue, (void **)a_avalues)
92: c-function ffi-call ffi_call1 a a a a -- void
93:
94: \c #define ffi_prep_closure1(a_ip, a_cif, a_closure) \
95: \c ffi_prep_closure((ffi_closure *)a_closure, (ffi_cif *)a_cif, gforth_callback_ffi, (void *)a_ip)
96: c-function ffi-prep-closure ffi_prep_closure1 a a a -- n
97:
98: \ !! use ud?
99: \c #define ffi_2fetch(a_addr) (*(long long *)a_addr)
100: c-function ffi-2@ ffi_2fetch a -- d
101:
102: \c #define ffi_2store(d,a_addr) ((*(long long *)a_addr) = (long long)d)
103: c-function ffi-2! ffi_2store d a -- void
104:
105: \c #define ffi_arg_int() (*(int *)(*gforth_clist++))
106: c-function ffi-arg-int ffi_arg_int -- n
107:
108: \c #define ffi_arg_long() (*(long *)(*gforth_clist++))
109: c-function ffi-arg-long ffi_arg_long -- n
110:
111: \c #define ffi_arg_longlong() (*(long long *)(*gforth_clist++))
112: c-function ffi-arg-longlong ffi_arg_longlong -- d
113:
114: \ !! correct? The primitive is different, but looks funny
115: c-function ffi-arg-dlong ffi_arg_long -- d
116:
117: \c #define ffi_arg_ptr() (*(char **)(*gforth_clist++))
118: c-function ffi-arg-ptr ffi_arg_ptr -- a
119:
120: \c #define ffi_arg_float() (*(float *)(*gforth_clist++))
121: c-function ffi-arg-float ffi_arg_float -- r
122:
123: \c #define ffi_arg_double() (*(double *)(*gforth_clist++))
124: c-function ffi-arg-double ffi_arg_double -- r
125:
126: : ffi-ret-void ( -- )
127: 0 (bye) ;
128:
129: \c #define ffi_ret_int1(w) (*(int*)(gforth_ritem) = w)
130: c-function ffi-ret-int1 ffi_ret_int1 n -- void
131: : ffi-ret-int ( w -- ) ffi-ret-int1 ffi-ret-void ;
132:
133: \c #define ffi_ret_longlong1(d) (*(long long *)(gforth_ritem) = d)
134: c-function ffi-ret-longlong1 ffi_ret_longlong1 d -- void
135: : ffi-ret-longlong ( d -- ) ffi-ret-longlong1 ffi-ret-void ;
136:
137: \c #define ffi_ret_dlong1(d) (*(long *)(gforth_ritem) = d)
138: c-function ffi-ret-dlong1 ffi_ret_dlong1 d -- void
139: : ffi-ret-dlong ( d -- ) ffi-ret-dlong1 ffi-ret-void ;
140:
141: c-function ffi-ret-long1 ffi_ret_dlong1 n -- void
142: : ffi-ret-long ( n -- ) ffi-ret-long1 ffi-ret-void ;
143:
144: \c #define ffi_ret_ptr1(w) (*(char **)(gforth_ritem) = w)
145: c-function ffi-ret-ptr1 ffi_ret_ptr1 a -- void
146: : ffi-ret-ptr ( a -- ) ffi-ret-ptr1 ffi-ret-void ;
147:
148: \c #define ffi_ret_float1(r) (*(float *)(gforth_ritem) = r)
149: c-function ffi-ret-float1 ffi_ret_float1 r -- void
150: : ffi-ret-float ( r -- ) ffi-ret-float1 ffi-ret-void ;
151:
152: \c #define ffi_ret_double1(r) (*(double *)(gforth_ritem) = r)
153: c-function ffi-ret-double1 ffi_ret_double1 r -- void
154: : ffi-ret-double ( r -- ) ffi-ret-double1 ffi-ret-void ;
155: end-c-library
156:
157: \ common stuff, same as fflib.fs
158:
159: Variable libs 0 libs !
160: \ links between libraries
161: Variable thisproc
162: Variable thislib
163:
164: Variable revdec revdec off
165: \ turn revdec on to compile bigFORTH libraries
166: Variable revarg revarg off
167: \ turn revarg on to compile declarations with reverse arguments
168: Variable legacy legacy off
169: \ turn legacy on to compile bigFORTH legacy libraries
170:
171: Vocabulary c-decl
172: Vocabulary cb-decl
173:
174: : @lib ( lib -- )
175: \G obtains library handle
176: cell+ dup 2 cells + count open-lib
177: dup 0= abort" Library not found" swap ! ;
178:
179: : @proc ( lib addr -- )
180: \G obtains symbol address
181: cell+ tuck cell+ @ count rot cell+ @
182: lib-sym dup 0= abort" Proc not found!" swap ! ;
183:
184: : proc, ( lib -- )
185: \G allocates and initializes proc stub
186: \G stub format:
187: \G linked list in library
188: \G address of proc
189: \G ptr to OS name of symbol as counted string
190: \G threaded code for invocation
191: here dup thisproc !
192: swap 2 cells + dup @ A, !
193: 0 , 0 A, ;
194:
195: Defer legacy-proc ' noop IS legacy-proc
196:
197: : proc: ( lib "name" -- )
198: \G Creates a named proc stub
199: Create proc, 0 also c-decl
200: legacy @ IF legacy-proc THEN
201: DOES> ( x1 .. xn -- r )
202: 3 cells + >r ;
203:
204: : library ( "name" "file" -- )
205: \G loads library "file" and creates a proc defining word "name"
206: \G library format:
207: \G linked list of libraries
208: \G library handle
209: \G linked list of library's procs
210: \G OS name of library as counted string
211: Create here libs @ A, dup libs !
212: 0 , 0 A, parse-name string, @lib
213: DOES> ( -- ) dup thislib ! proc: ;
214:
215: : init-shared-libs ( -- )
216: defers 'cold libs
217: 0 libs BEGIN @ dup WHILE dup REPEAT drop
218: BEGIN dup WHILE >r
219: r@ @lib
220: r@ 2 cells + BEGIN @ dup WHILE r@ over @proc REPEAT
221: drop rdrop
222: REPEAT drop ;
223:
224: ' init-shared-libs IS 'cold
225:
226: : symbol, ( "c-symbol" -- )
227: here thisproc @ 2 cells + ! parse-name s,
228: thislib @ thisproc @ @proc ;
229:
230: \ stuff for libffi
231:
232: \ libffi uses a parameter array for the input
233:
234: $20 Value maxargs
235:
236: Create retbuf 2 cells allot
237: Create argbuf maxargs 2* cells allot
238: Create argptr maxargs 0 [DO] argbuf [I] 2* cells + A, [LOOP]
239:
240: \ "forward" when revarg is on
241:
242: \ : >c+ ( char buf -- buf' ) tuck c! cell+ cell+ ;
243: : >i+ ( n buf -- buf' ) tuck l! cell+ cell+ ;
244: : >p+ ( addr buf -- buf' ) tuck ! cell+ cell+ ;
245: : >d+ ( d buf -- buf' ) dup >r ffi-2! r> cell+ cell+ ;
246: : >dl+ ( d buf -- buf' ) nip dup >r ! r> cell+ cell+ ;
247: : >sf+ ( r buf -- buf' ) dup sf! cell+ cell+ ;
248: : >df+ ( r buf -- buf' ) dup df! cell+ cell+ ;
249:
250: \ "backward" when revarg is off
251:
252: : >i- ( n buf -- buf' ) 2 cells - tuck l! ;
253: : >p- ( addr buf -- buf' ) 2 cells - tuck ! ;
254: : >d- ( d buf -- buf' ) 2 cells - dup >r ffi-2! r> ;
255: : >dl- ( d buf -- buf' ) 2 cells - nip dup >r ! r> ;
256: : >sf- ( r buf -- buf' ) 2 cells - dup sf! ;
257: : >df- ( r buf -- buf' ) 2 cells - dup df! ;
258:
259: \ return value
260:
261: : i>x ( -- n ) retbuf l@ ;
262: : is>x ( -- n ) retbuf sl@ ;
263: : p>x ( -- addr ) retbuf @ ;
264: : dl>x ( -- d ) retbuf @ s>d ;
265: : d>x ( -- d ) retbuf ffi-2@ ;
266: : sf>x ( -- r ) retbuf sf@ ;
267: : df>x ( -- r ) retbuf df@ ;
268:
269: wordlist constant cifs
270:
271: Variable cifbuf $40 allot \ maximum: 64 parameters
272: : cifreset cifbuf cell+ cifbuf ! ;
273: cifreset
274: Variable args args off
275:
276: : argtype ( bkxt fwxt type "name" -- )
277: Create , , , DOES> 1 args +! ;
278:
279: : arg@ ( arg -- type pushxt )
280: dup @ swap cell+
281: revarg @ IF cell+ THEN @ ;
282:
283: : arg, ( xt -- )
284: dup ['] noop = IF drop EXIT THEN compile, ;
285:
286: : start, ( n -- ) cifbuf cell+ cifbuf !
287: revarg @ IF drop 0 ELSE 2* cells THEN argbuf +
288: postpone Literal ;
289:
290: Variable ind-call ind-call off
291: : fptr ind-call on Create here thisproc !
292: 0 , 0 , 0 , 0 also c-decl DOES> cell+ dup cell+ cell+ >r ! ;
293:
294: : ffi-call, ( -- lit-cif )
295: postpone drop postpone argptr postpone retbuf
296: thisproc @ cell+ postpone literal postpone @
297: 0 postpone literal here cell -
298: postpone ffi-call ;
299:
300: : cif, ( n -- )
301: cifbuf @ c! 1 cifbuf +! ;
302:
303: : cif@ ( -- addr u )
304: cifbuf cell+ cifbuf @ over - ;
305:
306: : create-cif ( rtype -- addr ) cif,
307: cif@ cifs search-wordlist
308: IF execute EXIT THEN
309: get-current >r cifs set-current
310: cif@ nextname Create here >r
311: cif@ 1- bounds ?DO I c@ ffi-type , LOOP r>
312: r> set-current ;
313:
314: : make-cif ( rtype -- addr ) create-cif
315: cif@ 1- tuck + c@ ffi-type here 0 ffi-size allot
316: dup >r ffi-prep-cif throw r> ;
317:
318: : decl, ( 0 arg1 .. argn call rtype start -- )
319: start, { retxt rtype } cifreset
320: revdec @ IF 0 >r
321: BEGIN dup WHILE >r REPEAT
322: BEGIN r> dup WHILE arg@ arg, REPEAT
323: ffi-call, retxt compile, postpone EXIT
324: BEGIN dup WHILE cif, REPEAT drop
325: ELSE 0 >r
326: BEGIN dup WHILE arg@ arg, >r REPEAT drop
327: ffi-call, retxt compile, postpone EXIT
328: BEGIN r> dup WHILE cif, REPEAT drop
329: THEN rtype make-cif swap ! here thisproc @ 2 cells + ! ;
330:
331: : rettype ( endxt n "name" -- )
332: Create 2,
333: DOES> 2@ args @ decl, ind-call @ 0= IF symbol, THEN
334: previous revarg off args off ind-call off ;
335:
336: 6 1 cells 4 > 2* - Constant _long
337:
338: also c-decl definitions
339:
340: : <rev> revarg on ;
341:
342: ' >i+ ' >i- 6 argtype int
343: ' >p+ ' >p- _long argtype long
344: ' >p+ ' >p- &12 argtype ptr
345: ' >d+ ' >d- 8 argtype llong
346: ' >dl+ ' >dl- 6 argtype dlong
347: ' >sf+ ' >sf- 9 argtype sf
348: ' >df+ ' >df- &10 argtype df
349:
350: ' noop 0 rettype (void)
351: ' is>x 6 rettype (int)
352: ' i>x 5 rettype (uint)
353: ' p>x _long rettype (long)
354: ' p>x &12 rettype (ptr)
355: ' d>x 8 rettype (llong)
356: ' dl>x 6 rettype (dlong)
357: ' sf>x 9 rettype (sf)
358: ' df>x &10 rettype (fp)
359:
360: : (addr) thisproc @ cell+ postpone Literal postpone @ postpone EXIT
361: drop symbol, previous revarg off args off ;
362:
363: previous definitions
364:
365: \ legacy support for old library interfaces
366: \ interface to old vararg stuff not implemented yet
367:
368: also c-decl
369:
370: :noname ( n 0 -- 0 int1 .. intn )
371: legacy @ 0< revarg !
372: swap 0 ?DO int LOOP (int)
373: ; IS legacy-proc
374:
375: : (int) ( n -- )
376: >r ' execute r> 0 ?DO int LOOP (int) ;
377: : (void) ( n -- )
378: >r ' execute r> 0 ?DO int LOOP (void) ;
379: : (float) ( n -- )
380: >r ' execute r> 0 ?DO df LOOP (fp) ;
381:
382: previous
383:
384: \ callback stuff
385:
386: Variable callbacks
387: \G link between callbacks
388:
389: Variable rtype
390:
391: : alloc-callback ( ip -- addr )
392: rtype @ make-cif here 1 ffi-size allot
393: dup >r ffi-prep-closure throw r> ;
394:
395: : callback ( -- )
396: Create 0 ] postpone >r also cb-decl cifreset
397: DOES>
398: 0 Value -1 cells allot
399: here >r 0 , callbacks @ A, r@ callbacks !
400: swap postpone Literal postpone call , postpone EXIT
401: r@ cell+ cell+ alloc-callback r> ! ;
402:
403: \ !! is the stack effect right? or is it ( 0 ret arg1 .. argn -- ) ?
404: : callback; ( 0 arg1 .. argn -- )
405: BEGIN over WHILE compile, REPEAT
406: postpone r> postpone execute compile, drop
407: \ !! should we put ]] 0 (bye) [[ here?
408: \ !! is the EXIT ever executed?
409: postpone EXIT postpone [ previous ; immediate
410:
411: : rettype' ( xt n -- )
412: Create , A, immediate
413: DOES> 2@ rtype ! ;
414: : argtype' ( xt n -- )
415: Create , A, immediate
416: DOES> 2@ cif, ;
417:
418: : init-callbacks ( -- )
419: defers 'cold callbacks cell -
420: BEGIN cell+ @ dup WHILE dup cell+ cell+ alloc-callback over !
421: REPEAT drop ;
422:
423: ' init-callbacks IS 'cold
424:
425: also cb-decl definitions
426:
427: \ arguments
428:
429: ' ffi-arg-int 6 argtype' int
430: ' ffi-arg-float 9 argtype' sf
431: ' ffi-arg-double &10 argtype' df
432: ' ffi-arg-long _long argtype' long
433: ' ffi-arg-longlong 8 argtype' llong
434: ' ffi-arg-dlong 6 argtype' dlong
435: ' ffi-arg-ptr &12 argtype' ptr
436:
437: ' ffi-ret-void 0 rettype' (void)
438: ' ffi-ret-int 6 rettype' (int)
439: ' ffi-ret-float 9 rettype' (sf)
440: ' ffi-ret-double &10 rettype' (fp)
441: ' ffi-ret-longlong 8 rettype' (llong)
442: ' ffi-ret-long _long rettype' (long)
443: ' ffi-ret-dlong _long rettype' (dlong)
444: ' ffi-ret-ptr &12 rettype' (ptr)
445:
446: previous definitions
447:
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