Annotation of gforth/fflib.fs, revision 1.20
1.2 pazsan 1: \ lib.fs shared library support package 16aug03py
1.1 pazsan 2:
1.17 anton 3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2005,2006,2007 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
21: require libcc.fs
22:
1.20 ! anton 23: clear-libs
! 24: s" avcall" add-lib
! 25: s" callback" add-lib
! 26:
1.19 anton 27: \c #include <avcall.h>
28: \c #include <callback.h>
29: \c static av_alist alist;
30: \c static va_alist gforth_clist;
31: \c static float frv;
32: \c static int irv;
33: \c static double drv;
34: \c static long long llrv;
35: \c static void * prv;
36: \c static Cell *gforth_RP;
37: \c static char *gforth_LP;
38: \c typedef void *Label;
39: \c typedef Label *Xt;
40: \c Label *gforth_engine(Xt *ip, Cell *sp, Cell *rp0, Float *fp, char *lp);
41: \c
42: \c void gforth_callback_ffcall(Xt* fcall, void * alist)
43: \c {
44: \c /* save global valiables */
45: \c Cell *rp = gforth_RP;
46: \c Cell *sp = gforth_SP;
47: \c Float *fp = gforth_FP;
48: \c char *lp = gforth_LP;
49: \c va_alist clist = gforth_clist;
50: \c
51: \c gforth_clist = (va_alist)alist;
52: \c
53: \c gforth_engine(fcall, sp, rp, fp, lp);
54: \c
55: \c /* restore global variables */
56: \c gforth_RP = rp;
57: \c gforth_SP = sp;
58: \c gforth_FP = fp;
59: \c gforth_LP = lp;
60: \c gforth_clist = clist;
61: \c }
62:
63: \c #define av_start_void1(c_addr) av_start_void(alist, c_addr)
64: c-function av-start-void av_start_void1 a -- void
65: \c #define av_start_int1(c_addr) av_start_int(alist, c_addr, &irv)
66: c-function av-start-int av_start_int1 a -- void
67: \c #define av_start_float1(c_addr) av_start_float(alist, c_addr, &frv)
68: c-function av-start-float av_start_float1 a -- void
69: \c #define av_start_double1(c_addr) av_start_double(alist, c_addr, &drv)
70: c-function av-start-double av_start_double1 a -- void
71: \c #define av_start_longlong1(c_addr) av_start_longlong(alist, c_addr, &llrv)
72: c-function av-start-longlong av_start_longlong1 a -- void
73: \c #define av_start_ptr1(c_addr) av_start_ptr(alist, c_addr, void *, &prv)
74: c-function av-start-ptr av_start_ptr1 a -- void
75: \c #define av_int1(w) av_int(alist,w)
76: c-function av-int av_int1 n -- void
77: \c #define av_float1(r) av_float(alist,r)
78: c-function av-float av_float1 r -- void
79: \c #define av_double1(r) av_double(alist,r)
80: c-function av-double av_double1 r -- void
81: \c #define av_longlong1(d) av_longlong(alist,d)
82: c-function av-longlong av_longlong1 d -- void
83: \c #define av_ptr1(a) av_ptr(alist, void *, a)
84: c-function av-ptr av_ptr1 a -- void
85: \c #define av_call_void() av_call(alist)
86: c-function av-call-void av_call_void -- void
87: \c #define av_call_int() (av_call(alist), irv)
88: c-function av-call-int av_call_int -- n
89: \c #define av_call_float() (av_call(alist), frv)
90: c-function av-call-float av_call_float -- r
91: \c #define av_call_double() (av_call(alist), drv)
92: c-function av-call-double av_call_double -- r
93: \c #define av_call_longlong() (av_call(alist), llrv)
94: c-function av-call-longlong av_call_longlong -- d
95: \c #define av_call_ptr() (av_call(alist), prv)
96: c-function av-call-ptr av_call_ptr -- a
97: \c #define alloc_callback1(a_ip) alloc_callback(gforth_callback_ffcall, (Xt *)a_ip)
98: c-function alloc-callback alloc_callback1 a -- a
99: \c #define va_start_void1() va_start_void(gforth_clist)
100: c-function va-start-void va_start_void1 -- void
101: \c #define va_start_int1() va_start_int(gforth_clist)
102: c-function va-start-int va_start_int1 -- void
103: \c #define va_start_longlong1() va_start_longlong(gforth_clist)
104: c-function va-start-longlong va_start_longlong1 -- void
105: \c #define va_start_ptr1() va_start_ptr(gforth_clist, (char *))
106: c-function va-start-ptr va_start_ptr1 -- void
107: \c #define va_start_float1() va_start_float(gforth_clist)
108: c-function va-start-float va_start_float1 -- void
109: \c #define va_start_double1() va_start_double(gforth_clist)
110: c-function va-start-double va_start_double1 -- void
111: \c #define va_arg_int1() va_arg_int(gforth_clist)
112: c-function va-arg-int va_arg_int1 -- n
113: \c #define va_arg_longlong1() va_arg_longlong(gforth_clist)
114: c-function va-arg-longlong va_arg_longlong1 -- d
115: \c #define va_arg_ptr1() va_arg_ptr(gforth_clist, char *)
116: c-function va-arg-ptr va_arg_ptr1 -- a
117: \c #define va_arg_float1() va_arg_float(gforth_clist)
118: c-function va-arg-float va_arg_float1 -- r
119: \c #define va_arg_double1() va_arg_double(gforth_clist)
120: c-function va-arg-double va_arg_double1 -- r
121: \c #define va_return_void1() va_return_void(gforth_clist)
122: c-function va-return-void1 va_return_void1 -- void
123: \c #define va_return_int1(w) va_return_int(gforth_clist,w)
124: c-function va-return-int1 va_return_int1 n -- void
125: \c #define va_return_ptr1(w) va_return_ptr(gforth_clist, void *, w)
126: c-function va-return-ptr1 va_return_ptr1 a -- void
127: \c #define va_return_longlong1(d) va_return_longlong(gforth_clist,d)
128: c-function va-return-longlong1 va_return_longlong1 d -- void
129: \c #define va_return_float1(r) va_return_float(gforth_clist,r)
130: c-function va-return-float1 va_return_float1 r -- void
131: \c #define va_return_double1(r) va_return_double(gforth_clist,r)
132: c-function va-return-double1 va_return_double1 r -- void
133:
134: : av-int-r 2r> >r av-int ;
135: : av-float-r f@local0 lp+ av-float ;
136: : av-double-r f@local0 lp+ av-double ;
137: : av-longlong-r r> 2r> rot >r av-longlong ;
138: : av-ptr-r 2r> >r av-ptr ;
139: : va-return-void va-return-void1 0 (bye) ;
140: : va-return-int va-return-int1 0 (bye) ;
141: : va-return-ptr va-return-ptr1 0 (bye) ;
142: : va-return-longlong va-return-longlong1 0 (bye) ;
143: : va-return-float va-return-float1 0 (bye) ;
144: : va-return-double va-return-double1 0 (bye) ;
145:
146: \ start of fflib proper
147:
1.1 pazsan 148: Variable libs 0 libs !
1.4 pazsan 149: \ links between libraries
1.1 pazsan 150: Variable thisproc
151: Variable thislib
1.4 pazsan 152:
1.2 pazsan 153: Variable revdec revdec off
154: \ turn revdec on to compile bigFORTH libraries
1.4 pazsan 155: Variable revarg revarg off
156: \ turn revarg on to compile declarations with reverse arguments
157: Variable legacy legacy off
158: \ turn legacy on to compile bigFORTH legacy libraries
1.2 pazsan 159:
160: Vocabulary c-decl
161: Vocabulary cb-decl
1.1 pazsan 162:
163: : @lib ( lib -- )
164: \G obtains library handle
165: cell+ dup 2 cells + count open-lib
166: dup 0= abort" Library not found" swap ! ;
167:
168: : @proc ( lib addr -- )
169: \G obtains symbol address
170: cell+ tuck cell+ @ count rot cell+ @
171: lib-sym dup 0= abort" Proc not found!" swap ! ;
172:
173: : proc, ( lib -- )
174: \G allocates and initializes proc stub
175: \G stub format:
176: \G linked list in library
177: \G address of proc
178: \G ptr to OS name of symbol as counted string
179: \G threaded code for invocation
180: here dup thisproc !
181: swap 2 cells + dup @ A, !
182: 0 , 0 A, ;
183:
1.4 pazsan 184: Defer legacy-proc ' noop IS legacy-proc
185:
1.1 pazsan 186: : proc: ( lib "name" -- )
1.4 pazsan 187: \G Creates a named proc stub
1.2 pazsan 188: Create proc, 0 also c-decl
1.4 pazsan 189: legacy @ IF legacy-proc THEN
1.1 pazsan 190: DOES> ( x1 .. xn -- r )
191: dup cell+ @ swap 3 cells + >r ;
192:
1.11 pazsan 193: Variable ind-call ind-call off
1.12 pazsan 194: : fptr ( "name" -- )
1.11 pazsan 195: Create here thisproc ! 0 , 0 , 0 , 0 also c-decl ind-call on
196: DOES> 3 cells + >r ;
197:
1.1 pazsan 198: : library ( "name" "file" -- )
1.4 pazsan 199: \G loads library "file" and creates a proc defining word "name"
200: \G library format:
201: \G linked list of libraries
202: \G library handle
203: \G linked list of library's procs
204: \G OS name of library as counted string
1.1 pazsan 205: Create here libs @ A, dup libs !
1.6 pazsan 206: 0 , 0 A, parse-name string, @lib
1.1 pazsan 207: DOES> ( -- ) dup thislib ! proc: ;
208:
209: : init-shared-libs ( -- )
1.16 anton 210: defers 'cold
211: 0 libs BEGIN
212: @ dup WHILE
213: dup REPEAT
214: drop BEGIN
215: dup WHILE
216: >r
217: r@ @lib
218: r@ 2 cells + BEGIN
219: @ dup WHILE
220: r@ over @proc REPEAT
221: drop rdrop
222: REPEAT
223: drop ;
1.1 pazsan 224:
225: ' init-shared-libs IS 'cold
226:
1.4 pazsan 227: : argtype ( revxt pushxt fwxt "name" -- )
228: Create , , , ;
229:
230: : arg@ ( arg -- argxt pushxt )
231: revarg @ IF 2 cells + @ ['] noop swap ELSE 2@ THEN ;
232:
233: : arg, ( xt -- )
234: dup ['] noop = IF drop EXIT THEN compile, ;
235:
236: : decl, ( 0 arg1 .. argn call start -- )
1.1 pazsan 237: 2@ compile, >r
1.2 pazsan 238: revdec @ IF 0 >r
1.4 pazsan 239: BEGIN dup WHILE >r REPEAT
240: BEGIN r> dup WHILE arg@ arg, REPEAT drop
241: BEGIN dup WHILE arg, REPEAT drop
242: ELSE 0 >r
243: BEGIN dup WHILE arg@ arg, >r REPEAT drop
244: BEGIN r> dup WHILE arg, REPEAT drop
1.1 pazsan 245: THEN
1.4 pazsan 246: r> compile, postpone EXIT ;
247:
248: : symbol, ( "c-symbol" -- )
1.6 pazsan 249: here thisproc @ 2 cells + ! parse-name s,
1.4 pazsan 250: thislib @ thisproc @ @proc ;
251:
252: : rettype ( endxt startxt "name" -- )
253: Create 2,
1.11 pazsan 254: DOES> decl, ind-call @ 0= IF symbol, THEN
255: previous revarg off ind-call off ;
1.2 pazsan 256:
257: also c-decl definitions
258:
1.4 pazsan 259: : <rev> revarg on ;
260:
261: ' av-int ' av-int-r ' >r argtype int
262: ' av-float ' av-float-r ' f>l argtype sf
263: ' av-double ' av-double-r ' f>l argtype df
1.14 pazsan 264: ' av-longlong ' av-longlong-r ' 2>r argtype dlong
1.4 pazsan 265: ' av-ptr ' av-ptr-r ' >r argtype ptr
266:
267: ' av-call-void ' av-start-void rettype (void)
268: ' av-call-int ' av-start-int rettype (int)
269: ' av-call-float ' av-start-float rettype (sf)
270: ' av-call-double ' av-start-double rettype (fp)
1.14 pazsan 271: ' av-call-longlong ' av-start-longlong rettype (dlong)
1.4 pazsan 272: ' av-call-ptr ' av-start-ptr rettype (ptr)
1.1 pazsan 273:
1.10 pazsan 274: : (addr) postpone EXIT drop symbol, previous revarg off ;
1.8 pazsan 275:
1.2 pazsan 276: previous definitions
1.1 pazsan 277:
1.4 pazsan 278: \ legacy support for old library interfaces
279: \ interface to old vararg stuff not implemented yet
1.1 pazsan 280:
1.2 pazsan 281: also c-decl
1.1 pazsan 282:
1.4 pazsan 283: :noname ( n 0 -- 0 int1 .. intn )
284: legacy @ 0< revarg !
285: swap 0 ?DO int LOOP (int)
286: ; IS legacy-proc
287:
1.1 pazsan 288: : (int) ( n -- )
1.4 pazsan 289: >r ' execute r> 0 ?DO int LOOP (int) ;
1.1 pazsan 290: : (void) ( n -- )
1.4 pazsan 291: >r ' execute r> 0 ?DO int LOOP (void) ;
1.1 pazsan 292: : (float) ( n -- )
1.4 pazsan 293: >r ' execute r> 0 ?DO df LOOP (fp) ;
1.2 pazsan 294:
295: previous
296:
297: \ callback stuff
298:
299: Variable callbacks
300: \G link between callbacks
301:
302: : callback ( -- )
303: Create 0 ] postpone >r also cb-decl
304: DOES>
305: Create here >r 0 , callbacks @ A, r@ callbacks !
1.3 pazsan 306: swap postpone Literal postpone call , postpone EXIT
1.2 pazsan 307: r> dup cell+ cell+ alloc-callback swap !
308: DOES> @ ;
309:
310: : callback; ( 0 xt1 .. xtn -- )
311: BEGIN over WHILE compile, REPEAT
312: postpone r> postpone execute compile, drop
313: postpone EXIT postpone [ previous ; immediate
314:
315: : va-ret ( xt xt -- )
316: Create A, A, immediate
317: DOES> 2@ compile, ;
318:
319: : init-callbacks ( -- )
320: defers 'cold callbacks 1 cells -
321: BEGIN cell+ @ dup WHILE dup cell+ cell+ alloc-callback over !
322: REPEAT drop ;
323:
324: ' init-callbacks IS 'cold
325:
326: also cb-decl definitions
327:
328: \ arguments
1.1 pazsan 329:
1.2 pazsan 330: ' va-arg-int Alias int
331: ' va-arg-float Alias sf
332: ' va-arg-double Alias df
1.14 pazsan 333: ' va-arg-longlong Alias dlong
1.2 pazsan 334: ' va-arg-ptr Alias ptr
335:
336: ' va-return-void ' va-start-void va-ret (void)
337: ' va-return-int ' va-start-int va-ret (int)
338: ' va-return-float ' va-start-float va-ret (sf)
339: ' va-return-double ' va-start-double va-ret (fp)
1.14 pazsan 340: ' va-return-longlong ' va-start-longlong va-ret (dlong)
1.2 pazsan 341: ' va-return-ptr ' va-start-ptr va-ret (ptr)
342:
343: previous definitions
1.20 ! anton 344: clear-libs
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