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