Annotation of gforth/libcc.fs, revision 1.53

1.1       anton       1: \ libcc.fs     foreign function interface implemented using a C compiler
                      2: 
1.50      anton       3: \ Copyright (C) 2006,2007,2008 Free Software Foundation, Inc.
1.1       anton       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
1.28      anton       9: \ as published by the Free Software Foundation, either version 3
1.1       anton      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
1.28      anton      18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1       anton      19: 
                     20: 
                     21: \ What this implementation does is this: if it sees a declaration like
                     22: 
1.2       anton      23: \ \ something that tells it that the current library is libc
1.6       anton      24: \ \c #include <unistd.h>
1.2       anton      25: \ c-function dlseek lseek n d n -- d
1.1       anton      26: 
                     27: \ it genererates C code similar to the following:
                     28: 
                     29: \ #include <gforth.h>
1.2       anton      30: \ #include <unistd.h>
1.1       anton      31: \ 
1.2       anton      32: \ void gforth_c_lseek_ndn_d(void)
1.1       anton      33: \ {
                     34: \   Cell *sp = gforth_SP;
                     35: \   Float *fp = gforth_FP;
1.2       anton      36: \   long long result;  /* longest type in C */
                     37: \   gforth_ll2d(lseek(sp[3],gforth_d2ll(sp[2],sp[1]),sp[0]),sp[3],sp[2]);
                     38: \   gforth_SP = sp+2;
1.1       anton      39: \ }
                     40: 
                     41: \ Then it compiles this code and dynamically links it into the Gforth
                     42: \ system (batching and caching are future work).  It also dynamically
                     43: \ links lseek.  Performing DLSEEK then puts the function pointer of
1.2       anton      44: \ the function pointer of gforth_c_lseek_ndn_d on the stack and
                     45: \ calls CALL-C.
                     46: 
1.7       anton      47: \ ToDo:
                     48: 
                     49: \ Batching, caching and lazy evaluation:
                     50: 
                     51: \ Batching:
                     52: 
                     53: \ New words are deferred, and the corresponding C functions are
                     54: \ collected in one file, until the first word is EXECUTEd; then the
                     55: \ file is compiled and linked into the system, and the word is
                     56: \ resolved.
                     57: 
                     58: \ Caching:
                     59: 
                     60: \ Instead of compiling all this stuff anew for every execution, we
                     61: \ keep the files around and have an index file containing the function
                     62: \ names and their corresponding .so files.  If the needed wrapper name
                     63: \ is already present, it is just linked instead of generating the
                     64: \ wrapper again.  This is all done by loading the index file(s?),
                     65: \ which define words for the wrappers in a separate wordlist.
                     66: 
                     67: \ The files are built in .../lib/gforth/$VERSION/libcc/ or
                     68: \ ~/.gforth/libcc/$HOST/.
                     69: 
1.2       anton      70: \ other things to do:
                     71: 
                     72: \ c-variable forth-name c-name
                     73: \ c-constant forth-name c-name
                     74: 
1.20      anton      75: \ Todo: conversion between function pointers and xts (both directions)
                     76: 
                     77: \ taking an xt and turning it into a function pointer:
                     78: 
                     79: \ e.g., assume we have the xt of + and want to create a C function int
                     80: \ gforth_callback_plus(int, int), and then pass the pointer to that
                     81: \ function:
                     82: 
                     83: \ There should be Forth code like this:
                     84: \   ] + 0 (bye)
                     85: \ Assume that the start of this code is START
                     86:         
                     87: \ Now, there should be a C function:
                     88: 
                     89: \ int gforth_callback_plus(int p1, int p2)
                     90: \ {
                     91: \   Cell   *sp = gforth_SP;
                     92: \   Float  *fp = gforth_FP;
                     93: \   Float  *fp = gforth_FP;
                     94: \   Address lp = gforth_LP;
                     95: \   sp -= 2;
                     96: \   sp[0] = p1;
                     97: \   sp[1] = p2;
                     98: \   gforth_engine(START, sp, rp, fp, lp);
                     99: \   sp += 1;
                    100: \   gforth_RP = rp;
                    101: \   gforth_SP = sp;
                    102: \   gforth_FP = fp;
                    103: \   gforth_LP = lp;
                    104: \   return sp[0];
                    105: \ }
                    106: 
                    107: \ and the pointer to that function is the C function pointer for the XT of +.
                    108: 
                    109: \ Future problems:
                    110: \   how to combine the Forth code generation with inlining
                    111: \   START is not a constant across executions (when caching the C files)
                    112: \      Solution: make START a variable, and store into it on startup with dlsym
                    113: 
                    114: \ Syntax:
                    115: \  callback <rettype> <params> <paramtypes> -- <rettype>
                    116: 
1.2       anton     117: 
                    118: \ data structures
                    119: 
1.10      anton     120: \ For every c-function, we have three words: two anonymous words
                    121: \ created by c-function-ft (first time) and c-function-rt (run-time),
                    122: \ and a named deferred word.  The deferred word first points to the
                    123: \ first-time word, then to the run-time word; the run-time word calls
                    124: \ the c function.
                    125: 
1.29      anton     126: [ifundef] parse-name
                    127:     ' parse-word alias parse-name
                    128: [then]
                    129: [ifundef] defer!
                    130: : defer! ( xt xt-deferred -- ) \ gforth  defer-store
                    131: \G Changes the @code{defer}red word @var{xt-deferred} to execute @var{xt}.
                    132:     >body [ has? rom [IF] ] @ [ [THEN] ] ! ;
                    133: [then]
                    134: 
                    135: \ : delete-file 2drop 0 ;
1.12      anton     136: 
                    137: require struct.fs
                    138: 
1.10      anton     139: \ c-function-ft word body:
1.12      anton     140: struct
                    141:     cell% field cff-cfr \ xt of c-function-rt word
                    142:     cell% field cff-deferred \ xt of c-function deferred word
                    143:     cell% field cff-lha \ address of the lib-handle for the lib that
                    144:                         \ contains the wrapper function of the word
                    145:     char% field cff-rtype  \ return type
                    146:     char% field cff-np     \ number of parameters
                    147:     1 0   field cff-ptypes \ #npar parameter types
                    148:     \  counted string: c-name
                    149: end-struct cff%
                    150: 
1.14      anton     151: variable c-source-file-id \ contains the source file id of the current batch
                    152: 0 c-source-file-id !
                    153: variable lib-handle-addr \ points to the library handle of the current batch.
                    154:                          \ the library handle is 0 if the current
                    155:                          \ batch is not yet compiled.
1.39      anton     156:   here 0 , lib-handle-addr ! \ just make sure LIB-HANDLE always works
1.23      anton     157: 2variable lib-filename   \ filename without extension
                    158: 2variable lib-modulename \ basename of the file without extension
1.44      anton     159: 2variable libcc-named-dir-v \ directory for named libcc wrapper libraries
                    160: 0 value libcc-path       \ pointer to path of library directories
1.2       anton     161: 
1.49      anton     162: defer replace-rpath ( c-addr1 u1 -- c-addr2 u2 )
                    163: ' noop is replace-rpath
1.35      anton     164: 
1.3       anton     165: : .nb ( n -- )
1.2       anton     166:     0 .r ;
                    167: 
                    168: : const+ ( n1 "name" -- n2 )
                    169:     dup constant 1+ ;
                    170: 
1.10      anton     171: : front-string { c-addr1 u1 c-addr2 u2 -- c-addr3 u3 }
                    172:     \ insert string c-addr2 u2 in buffer c-addr1 u1; c-addr3 u3 is the
                    173:     \ remainder of the buffer.
                    174:     assert( u1 u2 u>= )
                    175:     c-addr2 c-addr1 u2 move
                    176:     c-addr1 u1 u2 /string ;
                    177: 
                    178: : front-char { c-addr1 u1 c -- c-addr3 u2 }
                    179:     \ insert c in buffer c-addr1 u1; c-addr3 u3 is the remainder of
                    180:     \ the buffer.
                    181:     assert( u1 0 u> )
                    182:     c c-addr1 c!
                    183:     c-addr1 u1 1 /string ;
                    184: 
1.15      anton     185: : s+ { addr1 u1 addr2 u2 -- addr u }
                    186:     u1 u2 + allocate throw { addr }
                    187:     addr1 addr u1 move
                    188:     addr2 addr u1 + u2 move
                    189:     addr u1 u2 +
                    190: ;
                    191: 
                    192: : append { addr1 u1 addr2 u2 -- addr u }
                    193:     addr1 u1 u2 + dup { u } resize throw { addr }
                    194:     addr2 addr u1 + u2 move
                    195:     addr u ;
                    196: 
1.6       anton     197: \ linked list stuff (should go elsewhere)
                    198: 
                    199: struct
                    200:     cell% field list-next
                    201:     1 0   field list-payload
                    202: end-struct list%
                    203: 
                    204: : list-insert { node list -- }
                    205:     list list-next @ node list-next !
                    206:     node list list-next ! ;
                    207: 
                    208: : list-append { node endlistp -- }
                    209:     \ insert node at place pointed to by endlistp
                    210:     node endlistp @ list-insert
                    211:     node list-next endlistp ! ;
                    212: 
                    213: : list-map ( ... list xt -- ... )
                    214:     \ xt ( ... node -- ... )
                    215:     { xt } begin { node }
                    216:        node while
                    217:            node xt execute
                    218:            node list-next @
                    219:     repeat ;
                    220: 
1.33      anton     221: \ linked libraries
                    222: 
                    223: list%
                    224:     cell% 2* field c-lib-string
                    225: end-struct c-lib%
                    226: 
                    227: variable c-libs \ linked list of library names (without "lib")
                    228: 
1.53    ! anton     229: : add-lib ( c-addr u -- ) \ gforth
1.33      anton     230: \G Add library lib@i{string} to the list of libraries, where
                    231: \G @i{string} is represented by @i{c-addr u}.
                    232:     c-lib% %size allocate throw dup >r
                    233:     c-lib-string 2!
                    234:     r> c-libs list-insert ;
                    235: 
                    236: : append-l ( c-addr1 u1 node -- c-addr2 u2 )
                    237:     \ append " -l<nodelib>" to string1
                    238:     >r s"  -l" append r> c-lib-string 2@ append ;
                    239: 
1.6       anton     240: \ C prefix lines
                    241: 
                    242: \ linked list of longcstrings: [ link | count-cell | characters ]
                    243: 
                    244: list%
                    245:     cell% field c-prefix-count
                    246:     1 0   field c-prefix-chars
                    247: end-struct c-prefix%
                    248: 
                    249: variable c-prefix-lines 0 c-prefix-lines !
                    250: variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end !
                    251: 
1.14      anton     252: : print-c-prefix-line ( node -- )
                    253:     dup c-prefix-chars swap c-prefix-count @ type cr ;
                    254: 
                    255: : print-c-prefix-lines ( -- )
                    256:     c-prefix-lines @ ['] print-c-prefix-line list-map ;
                    257: 
1.6       anton     258: : save-c-prefix-line ( c-addr u -- )
1.14      anton     259:     c-source-file-id @ ?dup-if
                    260:        >r 2dup r> write-line throw
                    261:     then
1.6       anton     262:     align here 0 , c-prefix-lines-end list-append ( c-addr u )
                    263:     longstring, ;
                    264: 
1.18      anton     265: : \c ( "rest-of-line" -- ) \ gforth backslash-c
1.17      anton     266:     \G One line of C declarations for the C interface
1.6       anton     267:     -1 parse save-c-prefix-line ;
                    268: 
1.19      anton     269: s" #include <gforth/" version-string s+ s" /libcc.h>" append ( c-addr u )
                    270:   2dup save-c-prefix-line drop free throw
1.5       anton     271: 
1.6       anton     272: \ Types (for parsing)
1.5       anton     273: 
1.2       anton     274: wordlist constant libcc-types
                    275: 
                    276: get-current libcc-types set-current
                    277: 
                    278: \ index values
                    279: -1
                    280: const+ -- \ end of arguments
                    281: const+ n \ integer cell
1.5       anton     282: const+ a \ address cell
1.2       anton     283: const+ d \ double
                    284: const+ r \ float
                    285: const+ func \ C function pointer
                    286: const+ void
                    287: drop
                    288: 
                    289: set-current
                    290: 
                    291: : parse-libcc-type ( "libcc-type" -- u )
                    292:     parse-name libcc-types search-wordlist 0= -13 and throw execute ;
                    293: 
                    294: : parse-function-types ( "{libcc-type}" "--" "libcc-type" -- )
                    295:     here 2 chars allot here begin
                    296:        parse-libcc-type dup 0>= while
                    297:            c,
                    298:     repeat
1.3       anton     299:     drop here swap - over char+ c!
                    300:     parse-libcc-type dup 0< -32 and throw swap c! ;
1.2       anton     301: 
                    302: : type-letter ( n -- c )
1.52      pazsan    303:     chars s" nadrfv" drop + c@ ;
1.2       anton     304: 
                    305: \ count-stacks
                    306: 
                    307: : count-stacks-n ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    308:     1+ ;
                    309: 
1.5       anton     310: : count-stacks-a ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
1.2       anton     311:     1+ ;
                    312: 
                    313: : count-stacks-d ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    314:     2 + ;
                    315: 
                    316: : count-stacks-r ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    317:     swap 1+ swap ;
                    318: 
                    319: : count-stacks-func ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    320:     1+ ;
                    321: 
                    322: : count-stacks-void ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    323: ;
                    324: 
                    325: create count-stacks-types
                    326: ' count-stacks-n ,
1.5       anton     327: ' count-stacks-a ,
1.2       anton     328: ' count-stacks-d ,
                    329: ' count-stacks-r ,
                    330: ' count-stacks-func ,
                    331: ' count-stacks-void ,
                    332: 
                    333: : count-stacks ( pars -- fp-change sp-change )
                    334:     \ pars is an addr u pair
                    335:     0 0 2swap over + swap u+do
1.3       anton     336:        i c@ cells count-stacks-types + @ execute
1.2       anton     337:     loop ;
                    338: 
                    339: \ gen-pars
                    340: 
                    341: : gen-par-n ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.5       anton     342:     ." sp[" 1- dup .nb ." ]" ;
1.2       anton     343: 
1.5       anton     344: : gen-par-a ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.2       anton     345:     ." (void *)(" gen-par-n ." )" ;
                    346: 
                    347: : gen-par-d ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.4       anton     348:     ." gforth_d2ll(" gen-par-n ." ," gen-par-n ." )" ;
1.2       anton     349: 
                    350: : gen-par-r ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.3       anton     351:     swap 1- tuck ." fp[" .nb ." ]" ;
1.2       anton     352: 
                    353: : gen-par-func ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.5       anton     354:     gen-par-a ;
1.2       anton     355: 
                    356: : gen-par-void ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
                    357:     -32 throw ;
                    358: 
                    359: create gen-par-types
                    360: ' gen-par-n ,
1.5       anton     361: ' gen-par-a ,
1.2       anton     362: ' gen-par-d ,
                    363: ' gen-par-r ,
                    364: ' gen-par-func ,
                    365: ' gen-par-void ,
                    366: 
                    367: : gen-par ( fp-depth1 sp-depth1 partype -- fp-depth2 sp-depth2 )
1.3       anton     368:     cells gen-par-types + @ execute ;
1.2       anton     369: 
                    370: \ the call itself
                    371: 
                    372: : gen-wrapped-call { d: pars d: c-name fp-change1 sp-change1 -- }
                    373:     c-name type ." ("
1.3       anton     374:     fp-change1 sp-change1 pars over + swap u+do 
1.2       anton     375:        i c@ gen-par
                    376:        i 1+ i' < if
                    377:            ." ,"
                    378:        endif
                    379:     loop
                    380:     2drop ." )" ;
                    381: 
                    382: \ calls for various kinds of return values
                    383: 
                    384: : gen-wrapped-void ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
                    385:     2dup 2>r gen-wrapped-call 2r> ;
                    386: 
1.3       anton     387: : gen-wrapped-n ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
1.5       anton     388:     2dup gen-par-n 2>r ." =" gen-wrapped-call 2r> ;
1.3       anton     389: 
1.5       anton     390: : gen-wrapped-a ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
                    391:     2dup gen-par-n 2>r ." =(Cell)" gen-wrapped-call 2r> ;
1.3       anton     392: 
                    393: : gen-wrapped-d ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
                    394:     ." gforth_ll2d(" gen-wrapped-void
1.5       anton     395:     ." ," gen-par-n ." ," gen-par-n ." )" ;
1.3       anton     396: 
                    397: : gen-wrapped-r ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
1.30      anton     398:     2dup gen-par-r 2>r ." =" gen-wrapped-call 2r> ;
1.3       anton     399: 
                    400: : gen-wrapped-func ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
1.5       anton     401:     gen-wrapped-a ;
1.3       anton     402: 
1.2       anton     403: create gen-wrapped-types
                    404: ' gen-wrapped-n ,
1.5       anton     405: ' gen-wrapped-a ,
1.2       anton     406: ' gen-wrapped-d ,
                    407: ' gen-wrapped-r ,
                    408: ' gen-wrapped-func ,
                    409: ' gen-wrapped-void ,
                    410: 
                    411: : gen-wrapped-stmt ( pars c-name fp-change1 sp-change1 ret -- fp-change sp-change )
1.3       anton     412:     cells gen-wrapped-types + @ execute ;
1.2       anton     413: 
1.10      anton     414: : wrapper-function-name ( addr -- c-addr u )
                    415:     \ addr points to the return type index of a c-function descriptor
                    416:     count { r-type } count { d: pars }
                    417:     pars + count { d: c-name }
                    418:     s" gforth_c_" { d: prefix }
                    419:     prefix nip c-name nip + pars nip + 3 + { u }
                    420:     u allocate throw { c-addr }
                    421:     c-addr u
                    422:     prefix front-string c-name front-string '_ front-char
                    423:     pars bounds u+do
                    424:        i c@ type-letter front-char
                    425:     loop
                    426:     '_ front-char r-type type-letter front-char assert( dup 0= )
                    427:     2drop c-addr u ;
                    428: 
1.2       anton     429: : gen-wrapper-function ( addr -- )
                    430:     \ addr points to the return type index of a c-function descriptor
1.10      anton     431:     dup { descriptor }
1.13      anton     432:     count { ret } count 2dup { d: pars } chars + count { d: c-name }
1.23      anton     433:     ." void " lib-modulename 2@ type ." _LTX_" descriptor wrapper-function-name 2dup type drop free throw
1.10      anton     434:     .\" (void)\n"
1.4       anton     435:     .\" {\n  Cell MAYBE_UNUSED *sp = gforth_SP;\n  Float MAYBE_UNUSED *fp = gforth_FP;\n  "
1.2       anton     436:     pars c-name 2over count-stacks ret gen-wrapped-stmt .\" ;\n"
                    437:     ?dup-if
1.3       anton     438:        ."   gforth_SP = sp+" .nb .\" ;\n"
1.2       anton     439:     endif
                    440:     ?dup-if
1.3       anton     441:        ."   gforth_FP = fp+" .nb .\" ;\n"
1.2       anton     442:     endif
1.3       anton     443:     .\" }\n" ;
1.2       anton     444: 
1.40      anton     445: : scan-back { c-addr u1 c -- c-addr u2 }
                    446:     \ the last occurence of c in c-addr u1 is at u2-1; if it does not
                    447:     \ occur, u2=0.
                    448:     c-addr 1- c-addr u1 + 1- u-do
                    449:        i c@ c = if
                    450:            c-addr i over - 1+ unloop exit endif
                    451:     1 -loop
                    452:     c-addr 0 ;
                    453: 
                    454: : dirname ( c-addr1 u1 -- c-addr2 u2 )
                    455:     \ directory name of the file name c-addr1 u1, including the final "/".
                    456:     '/ scan-back ;
                    457: 
                    458: : basename ( c-addr1 u1 -- c-addr2 u2 )
                    459:     \ file name without directory component
                    460:     2dup dirname nip /string ;
1.16      anton     461: 
1.15      anton     462: : gen-filename ( x -- c-addr u )
1.35      anton     463:     \ generates a file basename for lib-handle-addr X
1.16      anton     464:     0 <<# ['] #s $10 base-execute #> 
1.35      anton     465:     s" gforth_c_" 2swap s+ #>> ;
                    466: 
1.40      anton     467: : libcc-named-dir ( -- c-addr u )
1.43      anton     468:     libcc-named-dir-v 2@ ;
1.40      anton     469: 
                    470: : libcc-tmp-dir ( -- c-addr u )
1.41      anton     471:     s" ~/.gforth/libcc-tmp/" ;
1.40      anton     472: 
                    473: : prepend-dirname ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 )
1.41      anton     474:     2over s+ 2swap drop free throw ;
1.35      anton     475: 
1.42      anton     476: : open-wrappers ( -- addr|0 )
                    477:     lib-filename 2@ s" .la" s+
                    478:     2dup libcc-named-dir string-prefix? if ( c-addr u )
                    479:        \ see if we can open it in the path
                    480:        libcc-named-dir nip /string
                    481:        libcc-path open-path-file if
                    482:            0 exit endif
                    483:        ( wfile-id c-addr2 u2 ) rot close-file throw save-mem ( c-addr2 u2 )
                    484:     endif
                    485:     \ 2dup cr type
                    486:     2dup open-lib >r
                    487:     drop free throw r> ;
                    488: 
1.39      anton     489: : c-library-name-setup ( c-addr u -- )
1.35      anton     490:     assert( c-source-file-id @ 0= )
1.40      anton     491:     { d: filename }
1.37      anton     492:     here 0 , lib-handle-addr ! filename lib-filename 2!
1.40      anton     493:     filename basename lib-modulename 2! ;
1.39      anton     494:    
                    495: : c-library-name-create ( -- )
                    496:     lib-filename 2@ s" .c" s+ 2dup w/o create-file throw
                    497:     dup c-source-file-id !
                    498:     ['] print-c-prefix-lines swap outfile-execute
                    499:     drop free throw ;
                    500: 
1.40      anton     501: : c-named-library-name ( c-addr u -- )
1.39      anton     502:     \ set up filenames for a (possibly new) library; c-addr u is the
                    503:     \ basename of the library
1.40      anton     504:     libcc-named-dir prepend-dirname c-library-name-setup
1.37      anton     505:     open-wrappers dup if
                    506:        lib-handle-addr @ !
                    507:     else
1.39      anton     508:        drop c-library-name-create
1.37      anton     509:     endif ;
                    510: 
1.40      anton     511: : c-tmp-library-name ( c-addr u -- )
1.39      anton     512:     \ set up filenames for a new library; c-addr u is the basename of
                    513:     \ the library
1.40      anton     514:     libcc-tmp-dir prepend-dirname c-library-name-setup c-library-name-create ;
1.39      anton     515: 
1.37      anton     516: : lib-handle ( -- addr )
                    517:     lib-handle-addr @ @ ;
1.15      anton     518: 
1.12      anton     519: : init-c-source-file ( -- )
1.37      anton     520:     lib-handle 0= if
                    521:        c-source-file-id @ 0= if
1.40      anton     522:            here gen-filename c-tmp-library-name
1.37      anton     523:        endif
1.12      anton     524:     endif ;
1.11      anton     525: 
                    526: : c-source-file ( -- file-id )
1.12      anton     527:     c-source-file-id @ assert( dup ) ;
1.11      anton     528: 
1.37      anton     529: : notype-execute ( ... xt -- ... )
                    530:     what's type { oldtype } try
                    531:        ['] 2drop is type execute 0
                    532:     restore
                    533:        oldtype is type
                    534:     endtry
                    535:     throw ;
                    536: 
                    537: : c-source-file-execute ( ... xt -- ... )
                    538:     \ direct the output of xt to c-source-file, or nothing
                    539:     lib-handle if
                    540:        notype-execute
                    541:     else
                    542:        c-source-file outfile-execute
                    543:     endif ;
                    544: 
1.24      anton     545: : .lib-error ( -- )
                    546:     [ifdef] lib-error
                    547:         ['] cr stderr outfile-execute
1.31      anton     548:         lib-error ['] type stderr outfile-execute
1.24      anton     549:     [then] ;
1.23      anton     550: 
1.33      anton     551: DEFER compile-wrapper-function ( -- )
1.35      anton     552: : compile-wrapper-function1 ( -- )
1.37      anton     553:     lib-handle 0= if
                    554:        c-source-file close-file throw
                    555:        0 c-source-file-id !
1.48      anton     556:        [ libtool-command s"  --silent --mode=compile --tag=CC " s+
                    557:          libtool-cc append s"  -I " append
                    558:          s" includedir" getenv append ] sliteral
1.37      anton     559:        s"  -O -c " s+ lib-filename 2@ append s" .c -o " append
                    560:        lib-filename 2@ append s" .lo" append ( c-addr u )
1.47      pazsan    561:        \    cr 2dup type
1.37      anton     562:        2dup system drop free throw $? abort" libtool compile failed"
1.48      anton     563:        [ libtool-command s"  --silent --mode=link --tag=CC " s+
                    564:          libtool-cc append s"  -module -rpath " s+ ] sliteral
1.49      anton     565:        lib-filename 2@ dirname replace-rpath s+ s"  " append
1.37      anton     566:        lib-filename 2@ append s" .lo -o " append
                    567:        lib-filename 2@ append s" .la" append ( c-addr u )
                    568:        c-libs @ ['] append-l list-map
1.47      pazsan    569:        \    2dup type cr
1.37      anton     570:        2dup system drop free throw $? abort" libtool link failed"
                    571:        open-wrappers dup 0= if
                    572:            .lib-error true abort" open-lib failed"
                    573:        endif
                    574:        ( lib-handle ) lib-handle-addr @ !
1.23      anton     575:     endif
1.35      anton     576:     lib-filename 2@ drop free throw 0 0 lib-filename 2! ;
                    577: ' compile-wrapper-function1 IS compile-wrapper-function
1.5       anton     578: \    s" ar rcs xxx.a xxx.o" system
                    579: \    $? abort" ar generated error" ;
                    580: 
1.12      anton     581: : link-wrapper-function { cff -- sym }
                    582:     cff cff-rtype wrapper-function-name { d: wrapper-name }
1.23      anton     583:     wrapper-name cff cff-lha @ @ assert( dup ) lib-sym dup 0= if
1.24      anton     584:         .lib-error -&32 throw
1.23      anton     585:     endif
1.10      anton     586:     wrapper-name drop free throw ;
1.8       anton     587: 
1.12      anton     588: : c-function-ft ( xt-defr xt-cfr "c-name" "{libcc-type}" "--" "libcc-type" -- )
1.8       anton     589:     \ build time/first time action for c-function
1.12      anton     590:     init-c-source-file
                    591:     noname create 2, lib-handle-addr @ ,
1.2       anton     592:     parse-name { d: c-name }
1.8       anton     593:     here parse-function-types c-name string,
1.37      anton     594:     ['] gen-wrapper-function c-source-file-execute
1.8       anton     595:   does> ( ... -- ... )
1.10      anton     596:     dup 2@ { xt-defer xt-cfr }
1.12      anton     597:     dup cff-lha @ @ 0= if
                    598:        compile-wrapper-function
                    599:     endif
                    600:     link-wrapper-function xt-cfr >body !
1.8       anton     601:     xt-cfr xt-defer defer!
                    602:     xt-cfr execute ;
                    603: 
                    604: : c-function-rt ( -- )
                    605:     \ run-time definition for c function; addr is the address where
                    606:     \ the sym should be stored
                    607:     noname create 0 ,
1.2       anton     608:   does> ( ... -- ... )
                    609:     @ call-c ;
                    610: 
1.18      anton     611: : c-function ( "forth-name" "c-name" "@{type@}" "--" "type" -- ) \ gforth
1.17      anton     612:     \G Define a Forth word @i{forth-name}.  @i{Forth-name} has the
                    613:     \G specified stack effect and calls the C function @code{c-name}.
1.8       anton     614:     defer lastxt dup c-function-rt lastxt c-function-ft
                    615:     lastxt swap defer! ;
1.33      anton     616: 
1.53    ! anton     617: : clear-libs ( -- ) \ gforth
1.33      anton     618: \G Clear the list of libs
                    619:     c-source-file-id @ if
                    620:        compile-wrapper-function
                    621:     endif
                    622:     0 c-libs ! ;
                    623: clear-libs
1.35      anton     624: 
                    625: : c-library-incomplete ( -- )
                    626:     true abort" Called function of unfinished named C library" ;
                    627: 
                    628: : c-library-name ( c-addr u -- ) \ gforth
1.38      anton     629: \G Start a C library interface with name @i{c-addr u}.
1.35      anton     630:     clear-libs
                    631:     ['] c-library-incomplete is compile-wrapper-function
1.40      anton     632:     c-named-library-name ;
1.35      anton     633: 
                    634: : c-library ( "name" -- ) \ gforth
                    635: \G Parsing version of @code{c-library-name}
1.39      anton     636:     parse-name save-mem c-library-name ;
1.35      anton     637: 
1.38      anton     638: : end-c-library ( -- ) \ gforth
                    639: \G Finish and (if necessary) build the latest C library interface.
1.35      anton     640:     ['] compile-wrapper-function1 is compile-wrapper-function
                    641:     compile-wrapper-function1 ;
1.43      anton     642: 
                    643: : init-libcc ( -- )
                    644:     s" ~/.gforth/libcc-named/" libcc-named-dir-v 2!
1.45      pazsan    645: [IFDEF] make-path
1.43      anton     646:     make-path to libcc-path
                    647:     libcc-named-dir libcc-path also-path
                    648:     [ s" libccdir" getenv ] sliteral libcc-path also-path
1.45      pazsan    649: [THEN]
1.43      anton     650: ;
                    651: 
                    652: init-libcc
                    653: 
                    654: :noname ( -- )
                    655:     defers 'cold
                    656:     init-libcc ;
                    657: is 'cold

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