Annotation of gforth/fflib.fs, revision 1.29
1.2 pazsan 1: \ lib.fs shared library support package 16aug03py
1.1 pazsan 2:
1.29 ! anton 3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
1.1 pazsan 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
1.18 anton 9: \ as published by the Free Software Foundation, either version 3
1.1 pazsan 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
1.18 anton 18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1 pazsan 19:
1.19 anton 20: \ replacements for former primitives
1.21 anton 21: c-library fflib
1.20 anton 22: s" avcall" add-lib
23: s" callback" add-lib
24:
1.19 anton 25: \c #include <avcall.h>
26: \c #include <callback.h>
27: \c static av_alist alist;
28: \c static va_alist gforth_clist;
1.26 pazsan 29: \c #ifndef HAS_BACKLINK
30: \c static void **saved_gforth_pointers;
31: \c #endif
1.19 anton 32: \c static float frv;
33: \c static int irv;
34: \c static double drv;
35: \c static long long llrv;
36: \c static void * prv;
37: \c typedef void *Label;
38: \c typedef Label *Xt;
39: \c
40: \c void gforth_callback_ffcall(Xt* fcall, void * alist)
41: \c {
1.26 pazsan 42: \c #ifndef HAS_BACKLINK
43: \c void **gforth_pointers = saved_gforth_pointers;
44: \c #endif
45: \c {
1.28 anton 46: \c /* save global variables */
1.26 pazsan 47: \c Cell *rp = gforth_RP;
48: \c Cell *sp = gforth_SP;
49: \c Float *fp = gforth_FP;
50: \c char *lp = gforth_LP;
51: \c va_alist clist = gforth_clist;
1.19 anton 52: \c
1.26 pazsan 53: \c gforth_clist = (va_alist)alist;
1.19 anton 54: \c
1.26 pazsan 55: \c gforth_engine(fcall, sp, rp, fp, lp, gforth_UP);
1.19 anton 56: \c
1.26 pazsan 57: \c /* restore global variables */
58: \c gforth_RP = rp;
59: \c gforth_SP = sp;
60: \c gforth_FP = fp;
61: \c gforth_LP = lp;
62: \c gforth_clist = clist;
63: \c }
1.19 anton 64: \c }
65:
66: \c #define av_start_void1(c_addr) av_start_void(alist, c_addr)
67: c-function av-start-void av_start_void1 a -- void
68: \c #define av_start_int1(c_addr) av_start_int(alist, c_addr, &irv)
69: c-function av-start-int av_start_int1 a -- void
70: \c #define av_start_float1(c_addr) av_start_float(alist, c_addr, &frv)
71: c-function av-start-float av_start_float1 a -- void
72: \c #define av_start_double1(c_addr) av_start_double(alist, c_addr, &drv)
73: c-function av-start-double av_start_double1 a -- void
74: \c #define av_start_longlong1(c_addr) av_start_longlong(alist, c_addr, &llrv)
75: c-function av-start-longlong av_start_longlong1 a -- void
76: \c #define av_start_ptr1(c_addr) av_start_ptr(alist, c_addr, void *, &prv)
77: c-function av-start-ptr av_start_ptr1 a -- void
78: \c #define av_int1(w) av_int(alist,w)
79: c-function av-int av_int1 n -- void
80: \c #define av_float1(r) av_float(alist,r)
81: c-function av-float av_float1 r -- void
82: \c #define av_double1(r) av_double(alist,r)
83: c-function av-double av_double1 r -- void
84: \c #define av_longlong1(d) av_longlong(alist,d)
85: c-function av-longlong av_longlong1 d -- void
86: \c #define av_ptr1(a) av_ptr(alist, void *, a)
87: c-function av-ptr av_ptr1 a -- void
88: \c #define av_call_void() av_call(alist)
89: c-function av-call-void av_call_void -- void
90: \c #define av_call_int() (av_call(alist), irv)
91: c-function av-call-int av_call_int -- n
92: \c #define av_call_float() (av_call(alist), frv)
93: c-function av-call-float av_call_float -- r
94: \c #define av_call_double() (av_call(alist), drv)
95: c-function av-call-double av_call_double -- r
96: \c #define av_call_longlong() (av_call(alist), llrv)
97: c-function av-call-longlong av_call_longlong -- d
98: \c #define av_call_ptr() (av_call(alist), prv)
99: c-function av-call-ptr av_call_ptr -- a
100: \c #define alloc_callback1(a_ip) alloc_callback(gforth_callback_ffcall, (Xt *)a_ip)
101: c-function alloc-callback alloc_callback1 a -- a
102: \c #define va_start_void1() va_start_void(gforth_clist)
103: c-function va-start-void va_start_void1 -- void
104: \c #define va_start_int1() va_start_int(gforth_clist)
105: c-function va-start-int va_start_int1 -- void
106: \c #define va_start_longlong1() va_start_longlong(gforth_clist)
107: c-function va-start-longlong va_start_longlong1 -- void
108: \c #define va_start_ptr1() va_start_ptr(gforth_clist, (char *))
109: c-function va-start-ptr va_start_ptr1 -- void
110: \c #define va_start_float1() va_start_float(gforth_clist)
111: c-function va-start-float va_start_float1 -- void
112: \c #define va_start_double1() va_start_double(gforth_clist)
113: c-function va-start-double va_start_double1 -- void
114: \c #define va_arg_int1() va_arg_int(gforth_clist)
115: c-function va-arg-int va_arg_int1 -- n
116: \c #define va_arg_longlong1() va_arg_longlong(gforth_clist)
117: c-function va-arg-longlong va_arg_longlong1 -- d
118: \c #define va_arg_ptr1() va_arg_ptr(gforth_clist, char *)
119: c-function va-arg-ptr va_arg_ptr1 -- a
120: \c #define va_arg_float1() va_arg_float(gforth_clist)
121: c-function va-arg-float va_arg_float1 -- r
122: \c #define va_arg_double1() va_arg_double(gforth_clist)
123: c-function va-arg-double va_arg_double1 -- r
124: \c #define va_return_void1() va_return_void(gforth_clist)
125: c-function va-return-void1 va_return_void1 -- void
126: \c #define va_return_int1(w) va_return_int(gforth_clist,w)
127: c-function va-return-int1 va_return_int1 n -- void
128: \c #define va_return_ptr1(w) va_return_ptr(gforth_clist, void *, w)
129: c-function va-return-ptr1 va_return_ptr1 a -- void
130: \c #define va_return_longlong1(d) va_return_longlong(gforth_clist,d)
131: c-function va-return-longlong1 va_return_longlong1 d -- void
132: \c #define va_return_float1(r) va_return_float(gforth_clist,r)
133: c-function va-return-float1 va_return_float1 r -- void
134: \c #define va_return_double1(r) va_return_double(gforth_clist,r)
135: c-function va-return-double1 va_return_double1 r -- void
1.21 anton 136: end-c-library
1.19 anton 137:
138: : av-int-r 2r> >r av-int ;
139: : av-float-r f@local0 lp+ av-float ;
140: : av-double-r f@local0 lp+ av-double ;
141: : av-longlong-r r> 2r> rot >r av-longlong ;
142: : av-ptr-r 2r> >r av-ptr ;
143: : va-return-void va-return-void1 0 (bye) ;
144: : va-return-int va-return-int1 0 (bye) ;
145: : va-return-ptr va-return-ptr1 0 (bye) ;
146: : va-return-longlong va-return-longlong1 0 (bye) ;
147: : va-return-float va-return-float1 0 (bye) ;
148: : va-return-double va-return-double1 0 (bye) ;
149:
150: \ start of fflib proper
151:
1.1 pazsan 152: Variable libs 0 libs !
1.4 pazsan 153: \ links between libraries
1.1 pazsan 154: Variable thisproc
155: Variable thislib
1.4 pazsan 156:
1.2 pazsan 157: Variable revdec revdec off
158: \ turn revdec on to compile bigFORTH libraries
1.4 pazsan 159: Variable revarg revarg off
160: \ turn revarg on to compile declarations with reverse arguments
161: Variable legacy legacy off
162: \ turn legacy on to compile bigFORTH legacy libraries
1.2 pazsan 163:
164: Vocabulary c-decl
165: Vocabulary cb-decl
1.1 pazsan 166:
167: : @lib ( lib -- )
168: \G obtains library handle
169: cell+ dup 2 cells + count open-lib
170: dup 0= abort" Library not found" swap ! ;
171:
172: : @proc ( lib addr -- )
173: \G obtains symbol address
174: cell+ tuck cell+ @ count rot cell+ @
175: lib-sym dup 0= abort" Proc not found!" swap ! ;
176:
177: : proc, ( lib -- )
178: \G allocates and initializes proc stub
179: \G stub format:
180: \G linked list in library
181: \G address of proc
182: \G ptr to OS name of symbol as counted string
183: \G threaded code for invocation
184: here dup thisproc !
185: swap 2 cells + dup @ A, !
186: 0 , 0 A, ;
187:
1.4 pazsan 188: Defer legacy-proc ' noop IS legacy-proc
189:
1.1 pazsan 190: : proc: ( lib "name" -- )
1.4 pazsan 191: \G Creates a named proc stub
1.2 pazsan 192: Create proc, 0 also c-decl
1.4 pazsan 193: legacy @ IF legacy-proc THEN
1.1 pazsan 194: DOES> ( x1 .. xn -- r )
195: dup cell+ @ swap 3 cells + >r ;
196:
1.11 pazsan 197: Variable ind-call ind-call off
1.12 pazsan 198: : fptr ( "name" -- )
1.11 pazsan 199: Create here thisproc ! 0 , 0 , 0 , 0 also c-decl ind-call on
200: DOES> 3 cells + >r ;
201:
1.1 pazsan 202: : library ( "name" "file" -- )
1.4 pazsan 203: \G loads library "file" and creates a proc defining word "name"
204: \G library format:
205: \G linked list of libraries
206: \G library handle
207: \G linked list of library's procs
208: \G OS name of library as counted string
1.1 pazsan 209: Create here libs @ A, dup libs !
1.6 pazsan 210: 0 , 0 A, parse-name string, @lib
1.1 pazsan 211: DOES> ( -- ) dup thislib ! proc: ;
212:
213: : init-shared-libs ( -- )
1.16 anton 214: defers 'cold
215: 0 libs BEGIN
216: @ dup WHILE
217: dup REPEAT
218: drop BEGIN
219: dup WHILE
220: >r
221: r@ @lib
222: r@ 2 cells + BEGIN
223: @ dup WHILE
224: r@ over @proc REPEAT
225: drop rdrop
226: REPEAT
227: drop ;
1.1 pazsan 228:
229: ' init-shared-libs IS 'cold
230:
1.4 pazsan 231: : argtype ( revxt pushxt fwxt "name" -- )
232: Create , , , ;
233:
234: : arg@ ( arg -- argxt pushxt )
235: revarg @ IF 2 cells + @ ['] noop swap ELSE 2@ THEN ;
236:
237: : arg, ( xt -- )
238: dup ['] noop = IF drop EXIT THEN compile, ;
239:
240: : decl, ( 0 arg1 .. argn call start -- )
1.1 pazsan 241: 2@ compile, >r
1.2 pazsan 242: revdec @ IF 0 >r
1.4 pazsan 243: BEGIN dup WHILE >r REPEAT
244: BEGIN r> dup WHILE arg@ arg, REPEAT drop
245: BEGIN dup WHILE arg, REPEAT drop
246: ELSE 0 >r
247: BEGIN dup WHILE arg@ arg, >r REPEAT drop
248: BEGIN r> dup WHILE arg, REPEAT drop
1.1 pazsan 249: THEN
1.4 pazsan 250: r> compile, postpone EXIT ;
251:
252: : symbol, ( "c-symbol" -- )
1.6 pazsan 253: here thisproc @ 2 cells + ! parse-name s,
1.4 pazsan 254: thislib @ thisproc @ @proc ;
255:
256: : rettype ( endxt startxt "name" -- )
257: Create 2,
1.11 pazsan 258: DOES> decl, ind-call @ 0= IF symbol, THEN
259: previous revarg off ind-call off ;
1.2 pazsan 260:
1.27 pazsan 261: : func@ >body cell+ @ ;
262: : func' ' func@ ;
263: : [func'] postpone ['] postpone func@ ; immediate restrict
264:
1.2 pazsan 265: also c-decl definitions
266:
1.4 pazsan 267: : <rev> revarg on ;
268:
269: ' av-int ' av-int-r ' >r argtype int
270: ' av-float ' av-float-r ' f>l argtype sf
271: ' av-double ' av-double-r ' f>l argtype df
1.14 pazsan 272: ' av-longlong ' av-longlong-r ' 2>r argtype dlong
1.4 pazsan 273: ' av-ptr ' av-ptr-r ' >r argtype ptr
274:
275: ' av-call-void ' av-start-void rettype (void)
276: ' av-call-int ' av-start-int rettype (int)
277: ' av-call-float ' av-start-float rettype (sf)
278: ' av-call-double ' av-start-double rettype (fp)
1.14 pazsan 279: ' av-call-longlong ' av-start-longlong rettype (dlong)
1.4 pazsan 280: ' av-call-ptr ' av-start-ptr rettype (ptr)
1.1 pazsan 281:
1.10 pazsan 282: : (addr) postpone EXIT drop symbol, previous revarg off ;
1.8 pazsan 283:
1.2 pazsan 284: previous definitions
1.1 pazsan 285:
1.4 pazsan 286: \ legacy support for old library interfaces
287: \ interface to old vararg stuff not implemented yet
1.1 pazsan 288:
1.2 pazsan 289: also c-decl
1.1 pazsan 290:
1.4 pazsan 291: :noname ( n 0 -- 0 int1 .. intn )
292: legacy @ 0< revarg !
293: swap 0 ?DO int LOOP (int)
294: ; IS legacy-proc
295:
1.1 pazsan 296: : (int) ( n -- )
1.4 pazsan 297: >r ' execute r> 0 ?DO int LOOP (int) ;
1.1 pazsan 298: : (void) ( n -- )
1.4 pazsan 299: >r ' execute r> 0 ?DO int LOOP (void) ;
1.1 pazsan 300: : (float) ( n -- )
1.4 pazsan 301: >r ' execute r> 0 ?DO df LOOP (fp) ;
1.2 pazsan 302:
303: previous
304:
305: \ callback stuff
306:
307: Variable callbacks
308: \G link between callbacks
309:
310: : callback ( -- )
311: Create 0 ] postpone >r also cb-decl
312: DOES>
313: Create here >r 0 , callbacks @ A, r@ callbacks !
1.3 pazsan 314: swap postpone Literal postpone call , postpone EXIT
1.2 pazsan 315: r> dup cell+ cell+ alloc-callback swap !
316: DOES> @ ;
317:
318: : callback; ( 0 xt1 .. xtn -- )
319: BEGIN over WHILE compile, REPEAT
320: postpone r> postpone execute compile, drop
321: postpone EXIT postpone [ previous ; immediate
322:
323: : va-ret ( xt xt -- )
324: Create A, A, immediate
325: DOES> 2@ compile, ;
326:
327: : init-callbacks ( -- )
328: defers 'cold callbacks 1 cells -
329: BEGIN cell+ @ dup WHILE dup cell+ cell+ alloc-callback over !
330: REPEAT drop ;
331:
332: ' init-callbacks IS 'cold
333:
334: also cb-decl definitions
335:
336: \ arguments
1.1 pazsan 337:
1.2 pazsan 338: ' va-arg-int Alias int
339: ' va-arg-float Alias sf
340: ' va-arg-double Alias df
1.14 pazsan 341: ' va-arg-longlong Alias dlong
1.2 pazsan 342: ' va-arg-ptr Alias ptr
343:
344: ' va-return-void ' va-start-void va-ret (void)
345: ' va-return-int ' va-start-int va-ret (int)
346: ' va-return-float ' va-start-float va-ret (sf)
347: ' va-return-double ' va-start-double va-ret (fp)
1.14 pazsan 348: ' va-return-longlong ' va-start-longlong va-ret (dlong)
1.2 pazsan 349: ' va-return-ptr ' va-start-ptr va-ret (ptr)
350:
351: previous definitions
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