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| 1 : | pazsan | 1.1 | \ libffi.fs shared library support package 14aug05py |
| 2 : | |||
| 3 : | \ Copyright (C) 1995,1996,1997,1998,2000,2003,2005 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 2 | ||
| 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, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | ||
| 20 : | |||
| 21 : | \ common stuff, same as fflib.fs | ||
| 22 : | |||
| 23 : | Variable libs 0 libs ! | ||
| 24 : | \ links between libraries | ||
| 25 : | Variable thisproc | ||
| 26 : | Variable thislib | ||
| 27 : | |||
| 28 : | Variable revdec revdec off | ||
| 29 : | \ turn revdec on to compile bigFORTH libraries | ||
| 30 : | Variable revarg revarg off | ||
| 31 : | \ turn revarg on to compile declarations with reverse arguments | ||
| 32 : | Variable legacy legacy off | ||
| 33 : | \ turn legacy on to compile bigFORTH legacy libraries | ||
| 34 : | |||
| 35 : | Vocabulary c-decl | ||
| 36 : | Vocabulary cb-decl | ||
| 37 : | |||
| 38 : | : @lib ( lib -- ) | ||
| 39 : | \G obtains library handle | ||
| 40 : | cell+ dup 2 cells + count open-lib | ||
| 41 : | dup 0= abort" Library not found" swap ! ; | ||
| 42 : | |||
| 43 : | : @proc ( lib addr -- ) | ||
| 44 : | \G obtains symbol address | ||
| 45 : | cell+ tuck cell+ @ count rot cell+ @ | ||
| 46 : | lib-sym dup 0= abort" Proc not found!" swap ! ; | ||
| 47 : | |||
| 48 : | : proc, ( lib -- ) | ||
| 49 : | \G allocates and initializes proc stub | ||
| 50 : | \G stub format: | ||
| 51 : | \G linked list in library | ||
| 52 : | \G address of proc | ||
| 53 : | \G ptr to OS name of symbol as counted string | ||
| 54 : | \G threaded code for invocation | ||
| 55 : | here dup thisproc ! | ||
| 56 : | swap 2 cells + dup @ A, ! | ||
| 57 : | 0 , 0 A, ; | ||
| 58 : | |||
| 59 : | Defer legacy-proc ' noop IS legacy-proc | ||
| 60 : | |||
| 61 : | : proc: ( lib "name" -- ) | ||
| 62 : | \G Creates a named proc stub | ||
| 63 : | Create proc, 0 also c-decl | ||
| 64 : | legacy @ IF legacy-proc THEN | ||
| 65 : | DOES> ( x1 .. xn -- r ) | ||
| 66 : | 3 cells + >r ; | ||
| 67 : | |||
| 68 : | : library ( "name" "file" -- ) | ||
| 69 : | \G loads library "file" and creates a proc defining word "name" | ||
| 70 : | \G library format: | ||
| 71 : | \G linked list of libraries | ||
| 72 : | \G library handle | ||
| 73 : | \G linked list of library's procs | ||
| 74 : | \G OS name of library as counted string | ||
| 75 : | Create here libs @ A, dup libs ! | ||
| 76 : | 0 , 0 A, parse-name string, @lib | ||
| 77 : | DOES> ( -- ) dup thislib ! proc: ; | ||
| 78 : | |||
| 79 : | : init-shared-libs ( -- ) | ||
| 80 : | defers 'cold libs | ||
| 81 : | 0 libs BEGIN @ dup WHILE dup REPEAT drop | ||
| 82 : | BEGIN dup WHILE >r | ||
| 83 : | r@ @lib | ||
| 84 : | r@ 2 cells + BEGIN @ dup WHILE r@ over @proc REPEAT | ||
| 85 : | drop rdrop | ||
| 86 : | REPEAT drop ; | ||
| 87 : | |||
| 88 : | ' init-shared-libs IS 'cold | ||
| 89 : | |||
| 90 : | : symbol, ( "c-symbol" -- ) | ||
| 91 : | here thisproc @ 2 cells + ! parse-name s, | ||
| 92 : | thislib @ thisproc @ @proc ; | ||
| 93 : | |||
| 94 : | \ stuff for libffi | ||
| 95 : | |||
| 96 : | \ libffi uses a parameter array for the input | ||
| 97 : | |||
| 98 : | $20 Value maxargs | ||
| 99 : | |||
| 100 : | Create retbuf 2 cells allot | ||
| 101 : | Create argbuf maxargs 2* cells allot | ||
| 102 : | Create argptr maxargs 0 [DO] argbuf [I] 2* cells + A, [LOOP] | ||
| 103 : | |||
| 104 : | \ "forward" when revarg is on | ||
| 105 : | |||
| 106 : | \ : >c+ ( char buf -- buf' ) tuck c! cell+ cell+ ; | ||
| 107 : | : >i+ ( n buf -- buf' ) tuck ! cell+ cell+ ; | ||
| 108 : | : >p+ ( addr buf -- buf' ) tuck ! cell+ cell+ ; | ||
| 109 : | : >d+ ( d buf -- buf' ) dup >r ffi-2! r> cell+ cell+ ; | ||
| 110 : | : >sf+ ( r buf -- buf' ) dup sf! cell+ cell+ ; | ||
| 111 : | : >df+ ( r buf -- buf' ) dup df! cell+ cell+ ; | ||
| 112 : | |||
| 113 : | \ "backward" when revarg is off | ||
| 114 : | |||
| 115 : | pazsan | 1.7 | : >i- ( n buf -- buf' ) 2 cells - tuck l! ; |
| 116 : | pazsan | 1.1 | : >p- ( addr buf -- buf' ) 2 cells - tuck ! ; |
| 117 : | : >d- ( d buf -- buf' ) 2 cells - dup >r ffi-2! r> ; | ||
| 118 : | : >sf- ( r buf -- buf' ) 2 cells - dup sf! ; | ||
| 119 : | : >df- ( r buf -- buf' ) 2 cells - dup df! ; | ||
| 120 : | |||
| 121 : | \ return value | ||
| 122 : | |||
| 123 : | pazsan | 1.7 | : i>x ( -- n ) retbuf l@ ; |
| 124 : | : is>x ( -- n ) retbuf sl@ ; | ||
| 125 : | pazsan | 1.1 | : p>x ( -- addr ) retbuf @ ; |
| 126 : | : d>x ( -- d ) retbuf ffi-2@ ; | ||
| 127 : | : sf>x ( -- r ) retbuf sf@ ; | ||
| 128 : | : df>x ( -- r ) retbuf df@ ; | ||
| 129 : | |||
| 130 : | wordlist constant cifs | ||
| 131 : | |||
| 132 : | Variable cifbuf $40 allot \ maximum: 64 parameters | ||
| 133 : | pazsan | 1.2 | : cifreset cifbuf cell+ cifbuf ! ; |
| 134 : | cifreset | ||
| 135 : | pazsan | 1.1 | Variable args args off |
| 136 : | |||
| 137 : | : argtype ( bkxt fwxt type "name" -- ) | ||
| 138 : | Create , , , DOES> 1 args +! ; | ||
| 139 : | |||
| 140 : | : arg@ ( arg -- type pushxt ) | ||
| 141 : | dup @ swap cell+ | ||
| 142 : | revarg @ IF cell+ THEN @ ; | ||
| 143 : | |||
| 144 : | : arg, ( xt -- ) | ||
| 145 : | dup ['] noop = IF drop EXIT THEN compile, ; | ||
| 146 : | |||
| 147 : | : start, ( n -- ) cifbuf cell+ cifbuf ! | ||
| 148 : | revarg @ IF drop 0 ELSE 2* cells THEN argbuf + | ||
| 149 : | postpone Literal ; | ||
| 150 : | |||
| 151 : | : ffi-call, ( -- lit-cif ) | ||
| 152 : | postpone drop postpone argptr postpone retbuf | ||
| 153 : | thisproc @ cell+ postpone literal postpone @ | ||
| 154 : | 0 postpone literal here cell - | ||
| 155 : | postpone ffi-call ; | ||
| 156 : | |||
| 157 : | : cif, ( n -- ) | ||
| 158 : | cifbuf @ c! 1 cifbuf +! ; | ||
| 159 : | |||
| 160 : | : cif@ ( -- addr u ) | ||
| 161 : | cifbuf cell+ cifbuf @ over - ; | ||
| 162 : | |||
| 163 : | pazsan | 1.6 | : create-cif ( rtype -- addr ) cif, |
| 164 : | pazsan | 1.1 | cif@ cifs search-wordlist |
| 165 : | IF execute EXIT THEN | ||
| 166 : | get-current >r cifs set-current | ||
| 167 : | cif@ nextname Create here >r | ||
| 168 : | pazsan | 1.6 | cif@ 1- bounds ?DO I c@ ffi-type , LOOP r> |
| 169 : | r> set-current ; | ||
| 170 : | |||
| 171 : | : make-cif ( rtype -- addr ) create-cif | ||
| 172 : | cif@ 1- tuck + c@ ffi-type here 0 ffi-size allot | ||
| 173 : | dup >r ffi-prep-cif throw r> ; | ||
| 174 : | pazsan | 1.1 | |
| 175 : | : decl, ( 0 arg1 .. argn call rtype start -- ) | ||
| 176 : | pazsan | 1.2 | start, { retxt rtype } cifreset |
| 177 : | pazsan | 1.1 | revdec @ IF 0 >r |
| 178 : | BEGIN dup WHILE >r REPEAT | ||
| 179 : | BEGIN r> dup WHILE arg@ arg, REPEAT | ||
| 180 : | ffi-call, retxt compile, postpone EXIT | ||
| 181 : | BEGIN dup WHILE cif, REPEAT drop | ||
| 182 : | ELSE 0 >r | ||
| 183 : | BEGIN dup WHILE arg@ arg, >r REPEAT drop | ||
| 184 : | ffi-call, retxt compile, postpone EXIT | ||
| 185 : | BEGIN r> dup WHILE cif, REPEAT drop | ||
| 186 : | THEN rtype make-cif swap ! here thisproc @ 2 cells + ! ; | ||
| 187 : | |||
| 188 : | : rettype ( endxt n "name" -- ) | ||
| 189 : | Create 2, | ||
| 190 : | DOES> 2@ args @ decl, symbol, previous revarg off args off ; | ||
| 191 : | |||
| 192 : | also c-decl definitions | ||
| 193 : | |||
| 194 : | : <rev> revarg on ; | ||
| 195 : | |||
| 196 : | ' >i+ ' >i- 6 argtype int | ||
| 197 : | ' >p+ ' >p- &12 argtype ptr | ||
| 198 : | ' >d+ ' >d- 8 argtype llong | ||
| 199 : | ' >sf+ ' >sf- 9 argtype sf | ||
| 200 : | ' >df+ ' >df- &10 argtype df | ||
| 201 : | |||
| 202 : | ' noop 0 rettype (void) | ||
| 203 : | pazsan | 1.6 | ' is>x 6 rettype (int) |
| 204 : | ' i>x 6 rettype (uint) | ||
| 205 : | pazsan | 1.1 | ' p>x &12 rettype (ptr) |
| 206 : | ' d>x 8 rettype (llong) | ||
| 207 : | ' sf>x 9 rettype (sf) | ||
| 208 : | ' df>x &10 rettype (fp) | ||
| 209 : | |||
| 210 : | pazsan | 1.3 | : (addr) thisproc @ cell+ postpone Literal postpone @ postpone EXIT |
| 211 : | pazsan | 1.4 | drop symbol, previous revarg off args off ; |
| 212 : | pazsan | 1.3 | |
| 213 : | pazsan | 1.1 | previous definitions |
| 214 : | |||
| 215 : | \ legacy support for old library interfaces | ||
| 216 : | \ interface to old vararg stuff not implemented yet | ||
| 217 : | |||
| 218 : | also c-decl | ||
| 219 : | |||
| 220 : | :noname ( n 0 -- 0 int1 .. intn ) | ||
| 221 : | legacy @ 0< revarg ! | ||
| 222 : | swap 0 ?DO int LOOP (int) | ||
| 223 : | ; IS legacy-proc | ||
| 224 : | |||
| 225 : | : (int) ( n -- ) | ||
| 226 : | >r ' execute r> 0 ?DO int LOOP (int) ; | ||
| 227 : | : (void) ( n -- ) | ||
| 228 : | >r ' execute r> 0 ?DO int LOOP (void) ; | ||
| 229 : | : (float) ( n -- ) | ||
| 230 : | >r ' execute r> 0 ?DO df LOOP (fp) ; | ||
| 231 : | |||
| 232 : | previous | ||
| 233 : | |||
| 234 : | \ callback stuff | ||
| 235 : | |||
| 236 : | Variable callbacks | ||
| 237 : | \G link between callbacks | ||
| 238 : | |||
| 239 : | pazsan | 1.2 | Variable rtype |
| 240 : | |||
| 241 : | : alloc-callback ( -- addr ) | ||
| 242 : | pazsan | 1.6 | rtype @ create-cif |
| 243 : | cif@ 1- tuck + c@ ffi-type here dup >r 1 ffi-size allot | ||
| 244 : | pazsan | 1.2 | ffi-prep-closure throw r> ; |
| 245 : | |||
| 246 : | pazsan | 1.1 | : callback ( -- ) |
| 247 : | pazsan | 1.2 | Create 0 ] postpone >r also cb-decl cifreset |
| 248 : | pazsan | 1.1 | DOES> |
| 249 : | Create here >r 0 , callbacks @ A, r@ callbacks ! | ||
| 250 : | swap postpone Literal postpone call , postpone EXIT | ||
| 251 : | r> dup cell+ cell+ alloc-callback swap ! | ||
| 252 : | DOES> @ ; | ||
| 253 : | |||
| 254 : | pazsan | 1.2 | : callback; ( 0 arg1 .. argn -- ) |
| 255 : | pazsan | 1.1 | BEGIN over WHILE compile, REPEAT |
| 256 : | postpone r> postpone execute compile, drop | ||
| 257 : | postpone EXIT postpone [ previous ; immediate | ||
| 258 : | |||
| 259 : | pazsan | 1.2 | : rettype' ( xt n -- ) |
| 260 : | Create , A, immediate | ||
| 261 : | DOES> 2@ rtype ! ; | ||
| 262 : | : argtype' ( xt n -- ) | ||
| 263 : | Create , A, immediate | ||
| 264 : | DOES> 2@ cif, ; | ||
| 265 : | pazsan | 1.1 | |
| 266 : | : init-callbacks ( -- ) | ||
| 267 : | defers 'cold callbacks cell - | ||
| 268 : | BEGIN cell+ @ dup WHILE dup cell+ cell+ alloc-callback over ! | ||
| 269 : | REPEAT drop ; | ||
| 270 : | |||
| 271 : | ' init-callbacks IS 'cold | ||
| 272 : | |||
| 273 : | also cb-decl definitions | ||
| 274 : | |||
| 275 : | \ arguments | ||
| 276 : | |||
| 277 : | pazsan | 1.2 | ' ffi-arg-int 6 argtype' int |
| 278 : | ' ffi-arg-float 9 argtype' sf | ||
| 279 : | ' ffi-arg-double &10 argtype' df | ||
| 280 : | ' ffi-arg-longlong 8 argtype' llong | ||
| 281 : | ' ffi-arg-ptr &12 argtype' ptr | ||
| 282 : | |||
| 283 : | ' ffi-ret-void 0 rettype' (void) | ||
| 284 : | ' ffi-ret-int 6 rettype' (int) | ||
| 285 : | ' ffi-ret-float 9 rettype' (sf) | ||
| 286 : | ' ffi-ret-double &10 rettype' (fp) | ||
| 287 : | ' ffi-ret-longlong 8 rettype' (llong) | ||
| 288 : | ' ffi-ret-ptr &12 rettype' (ptr) | ||
| 289 : | pazsan | 1.1 | |
| 290 : | previous definitions | ||
| 291 : |
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