Annotation of gforth/libcc.fs, revision 1.43

1.1       anton       1: \ libcc.fs     foreign function interface implemented using a C compiler
                      2: 
1.27      anton       3: \ Copyright (C) 2006,2007 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: 
                    139:     \ counted-string
                    140:     
1.10      anton     141: \ c-function-ft word body:
1.12      anton     142: struct
                    143:     cell% field cff-cfr \ xt of c-function-rt word
                    144:     cell% field cff-deferred \ xt of c-function deferred word
                    145:     cell% field cff-lha \ address of the lib-handle for the lib that
                    146:                         \ contains the wrapper function of the word
                    147:     char% field cff-rtype  \ return type
                    148:     char% field cff-np     \ number of parameters
                    149:     1 0   field cff-ptypes \ #npar parameter types
                    150:     \  counted string: c-name
                    151: end-struct cff%
                    152: 
1.14      anton     153: variable c-source-file-id \ contains the source file id of the current batch
                    154: 0 c-source-file-id !
                    155: variable lib-handle-addr \ points to the library handle of the current batch.
                    156:                          \ the library handle is 0 if the current
                    157:                          \ batch is not yet compiled.
1.39      anton     158:   here 0 , lib-handle-addr ! \ just make sure LIB-HANDLE always works
1.23      anton     159: 2variable lib-filename   \ filename without extension
                    160: 2variable lib-modulename \ basename of the file without extension
1.2       anton     161: 
1.35      anton     162: : delete-file 2drop 0 ;
                    163: 
1.3       anton     164: : .nb ( n -- )
1.2       anton     165:     0 .r ;
                    166: 
                    167: : const+ ( n1 "name" -- n2 )
                    168:     dup constant 1+ ;
                    169: 
1.10      anton     170: : front-string { c-addr1 u1 c-addr2 u2 -- c-addr3 u3 }
                    171:     \ insert string c-addr2 u2 in buffer c-addr1 u1; c-addr3 u3 is the
                    172:     \ remainder of the buffer.
                    173:     assert( u1 u2 u>= )
                    174:     c-addr2 c-addr1 u2 move
                    175:     c-addr1 u1 u2 /string ;
                    176: 
                    177: : front-char { c-addr1 u1 c -- c-addr3 u2 }
                    178:     \ insert c in buffer c-addr1 u1; c-addr3 u3 is the remainder of
                    179:     \ the buffer.
                    180:     assert( u1 0 u> )
                    181:     c c-addr1 c!
                    182:     c-addr1 u1 1 /string ;
                    183: 
1.15      anton     184: : s+ { addr1 u1 addr2 u2 -- addr u }
                    185:     u1 u2 + allocate throw { addr }
                    186:     addr1 addr u1 move
                    187:     addr2 addr u1 + u2 move
                    188:     addr u1 u2 +
                    189: ;
                    190: 
                    191: : append { addr1 u1 addr2 u2 -- addr u }
                    192:     addr1 u1 u2 + dup { u } resize throw { addr }
                    193:     addr2 addr u1 + u2 move
                    194:     addr u ;
                    195: 
1.6       anton     196: \ linked list stuff (should go elsewhere)
                    197: 
                    198: struct
                    199:     cell% field list-next
                    200:     1 0   field list-payload
                    201: end-struct list%
                    202: 
                    203: : list-insert { node list -- }
                    204:     list list-next @ node list-next !
                    205:     node list list-next ! ;
                    206: 
                    207: : list-append { node endlistp -- }
                    208:     \ insert node at place pointed to by endlistp
                    209:     node endlistp @ list-insert
                    210:     node list-next endlistp ! ;
                    211: 
                    212: : list-map ( ... list xt -- ... )
                    213:     \ xt ( ... node -- ... )
                    214:     { xt } begin { node }
                    215:        node while
                    216:            node xt execute
                    217:            node list-next @
                    218:     repeat ;
                    219: 
1.33      anton     220: \ linked libraries
                    221: 
                    222: list%
                    223:     cell% 2* field c-lib-string
                    224: end-struct c-lib%
                    225: 
                    226: variable c-libs \ linked list of library names (without "lib")
                    227: 
                    228: : add-lib ( c-addr u -- )
                    229: \G Add library lib@i{string} to the list of libraries, where
                    230: \G @i{string} is represented by @i{c-addr u}.
                    231:     c-lib% %size allocate throw dup >r
                    232:     c-lib-string 2!
                    233:     r> c-libs list-insert ;
                    234: 
                    235: : append-l ( c-addr1 u1 node -- c-addr2 u2 )
                    236:     \ append " -l<nodelib>" to string1
                    237:     >r s"  -l" append r> c-lib-string 2@ append ;
                    238: 
1.6       anton     239: \ C prefix lines
                    240: 
                    241: \ linked list of longcstrings: [ link | count-cell | characters ]
                    242: 
                    243: list%
                    244:     cell% field c-prefix-count
                    245:     1 0   field c-prefix-chars
                    246: end-struct c-prefix%
                    247: 
                    248: variable c-prefix-lines 0 c-prefix-lines !
                    249: variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end !
                    250: 
1.14      anton     251: : print-c-prefix-line ( node -- )
                    252:     dup c-prefix-chars swap c-prefix-count @ type cr ;
                    253: 
                    254: : print-c-prefix-lines ( -- )
                    255:     c-prefix-lines @ ['] print-c-prefix-line list-map ;
                    256: 
1.6       anton     257: : save-c-prefix-line ( c-addr u -- )
1.14      anton     258:     c-source-file-id @ ?dup-if
                    259:        >r 2dup r> write-line throw
                    260:     then
1.6       anton     261:     align here 0 , c-prefix-lines-end list-append ( c-addr u )
                    262:     longstring, ;
                    263: 
1.18      anton     264: : \c ( "rest-of-line" -- ) \ gforth backslash-c
1.17      anton     265:     \G One line of C declarations for the C interface
1.6       anton     266:     -1 parse save-c-prefix-line ;
                    267: 
1.19      anton     268: s" #include <gforth/" version-string s+ s" /libcc.h>" append ( c-addr u )
                    269:   2dup save-c-prefix-line drop free throw
1.5       anton     270: 
1.6       anton     271: \ Types (for parsing)
1.5       anton     272: 
1.2       anton     273: wordlist constant libcc-types
                    274: 
                    275: get-current libcc-types set-current
                    276: 
                    277: \ index values
                    278: -1
                    279: const+ -- \ end of arguments
                    280: const+ n \ integer cell
1.5       anton     281: const+ a \ address cell
1.2       anton     282: const+ d \ double
                    283: const+ r \ float
                    284: const+ func \ C function pointer
                    285: const+ void
                    286: drop
                    287: 
                    288: set-current
                    289: 
                    290: : parse-libcc-type ( "libcc-type" -- u )
                    291:     parse-name libcc-types search-wordlist 0= -13 and throw execute ;
                    292: 
                    293: : parse-function-types ( "{libcc-type}" "--" "libcc-type" -- )
                    294:     here 2 chars allot here begin
                    295:        parse-libcc-type dup 0>= while
                    296:            c,
                    297:     repeat
1.3       anton     298:     drop here swap - over char+ c!
                    299:     parse-libcc-type dup 0< -32 and throw swap c! ;
1.2       anton     300: 
                    301: : type-letter ( n -- c )
1.5       anton     302:     chars s" nadrfv" drop + c@ ;
1.2       anton     303: 
                    304: \ count-stacks
                    305: 
                    306: : count-stacks-n ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    307:     1+ ;
                    308: 
1.5       anton     309: : count-stacks-a ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
1.2       anton     310:     1+ ;
                    311: 
                    312: : count-stacks-d ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    313:     2 + ;
                    314: 
                    315: : count-stacks-r ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    316:     swap 1+ swap ;
                    317: 
                    318: : count-stacks-func ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    319:     1+ ;
                    320: 
                    321: : count-stacks-void ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
                    322: ;
                    323: 
                    324: create count-stacks-types
                    325: ' count-stacks-n ,
1.5       anton     326: ' count-stacks-a ,
1.2       anton     327: ' count-stacks-d ,
                    328: ' count-stacks-r ,
                    329: ' count-stacks-func ,
                    330: ' count-stacks-void ,
                    331: 
                    332: : count-stacks ( pars -- fp-change sp-change )
                    333:     \ pars is an addr u pair
                    334:     0 0 2swap over + swap u+do
1.3       anton     335:        i c@ cells count-stacks-types + @ execute
1.2       anton     336:     loop ;
                    337: 
                    338: \ gen-pars
                    339: 
                    340: : gen-par-n ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.5       anton     341:     ." sp[" 1- dup .nb ." ]" ;
1.2       anton     342: 
1.5       anton     343: : gen-par-a ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.2       anton     344:     ." (void *)(" gen-par-n ." )" ;
                    345: 
                    346: : gen-par-d ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.4       anton     347:     ." gforth_d2ll(" gen-par-n ." ," gen-par-n ." )" ;
1.2       anton     348: 
                    349: : gen-par-r ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.3       anton     350:     swap 1- tuck ." fp[" .nb ." ]" ;
1.2       anton     351: 
                    352: : gen-par-func ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
1.5       anton     353:     gen-par-a ;
1.2       anton     354: 
                    355: : gen-par-void ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
                    356:     -32 throw ;
                    357: 
                    358: create gen-par-types
                    359: ' gen-par-n ,
1.5       anton     360: ' gen-par-a ,
1.2       anton     361: ' gen-par-d ,
                    362: ' gen-par-r ,
                    363: ' gen-par-func ,
                    364: ' gen-par-void ,
                    365: 
                    366: : gen-par ( fp-depth1 sp-depth1 partype -- fp-depth2 sp-depth2 )
1.3       anton     367:     cells gen-par-types + @ execute ;
1.2       anton     368: 
                    369: \ the call itself
                    370: 
                    371: : gen-wrapped-call { d: pars d: c-name fp-change1 sp-change1 -- }
                    372:     c-name type ." ("
1.3       anton     373:     fp-change1 sp-change1 pars over + swap u+do 
1.2       anton     374:        i c@ gen-par
                    375:        i 1+ i' < if
                    376:            ." ,"
                    377:        endif
                    378:     loop
                    379:     2drop ." )" ;
                    380: 
                    381: \ calls for various kinds of return values
                    382: 
                    383: : gen-wrapped-void ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
                    384:     2dup 2>r gen-wrapped-call 2r> ;
                    385: 
1.3       anton     386: : gen-wrapped-n ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
1.5       anton     387:     2dup gen-par-n 2>r ." =" gen-wrapped-call 2r> ;
1.3       anton     388: 
1.5       anton     389: : gen-wrapped-a ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
                    390:     2dup gen-par-n 2>r ." =(Cell)" gen-wrapped-call 2r> ;
1.3       anton     391: 
                    392: : gen-wrapped-d ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
                    393:     ." gforth_ll2d(" gen-wrapped-void
1.5       anton     394:     ." ," gen-par-n ." ," gen-par-n ." )" ;
1.3       anton     395: 
                    396: : gen-wrapped-r ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
1.30      anton     397:     2dup gen-par-r 2>r ." =" gen-wrapped-call 2r> ;
1.3       anton     398: 
                    399: : gen-wrapped-func ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
1.5       anton     400:     gen-wrapped-a ;
1.3       anton     401: 
1.2       anton     402: create gen-wrapped-types
                    403: ' gen-wrapped-n ,
1.5       anton     404: ' gen-wrapped-a ,
1.2       anton     405: ' gen-wrapped-d ,
                    406: ' gen-wrapped-r ,
                    407: ' gen-wrapped-func ,
                    408: ' gen-wrapped-void ,
                    409: 
                    410: : gen-wrapped-stmt ( pars c-name fp-change1 sp-change1 ret -- fp-change sp-change )
1.3       anton     411:     cells gen-wrapped-types + @ execute ;
1.2       anton     412: 
1.10      anton     413: : wrapper-function-name ( addr -- c-addr u )
                    414:     \ addr points to the return type index of a c-function descriptor
                    415:     count { r-type } count { d: pars }
                    416:     pars + count { d: c-name }
                    417:     s" gforth_c_" { d: prefix }
                    418:     prefix nip c-name nip + pars nip + 3 + { u }
                    419:     u allocate throw { c-addr }
                    420:     c-addr u
                    421:     prefix front-string c-name front-string '_ front-char
                    422:     pars bounds u+do
                    423:        i c@ type-letter front-char
                    424:     loop
                    425:     '_ front-char r-type type-letter front-char assert( dup 0= )
                    426:     2drop c-addr u ;
                    427: 
1.2       anton     428: : gen-wrapper-function ( addr -- )
                    429:     \ addr points to the return type index of a c-function descriptor
1.10      anton     430:     dup { descriptor }
1.13      anton     431:     count { ret } count 2dup { d: pars } chars + count { d: c-name }
1.23      anton     432:     ." void " lib-modulename 2@ type ." _LTX_" descriptor wrapper-function-name 2dup type drop free throw
1.10      anton     433:     .\" (void)\n"
1.4       anton     434:     .\" {\n  Cell MAYBE_UNUSED *sp = gforth_SP;\n  Float MAYBE_UNUSED *fp = gforth_FP;\n  "
1.2       anton     435:     pars c-name 2over count-stacks ret gen-wrapped-stmt .\" ;\n"
                    436:     ?dup-if
1.3       anton     437:        ."   gforth_SP = sp+" .nb .\" ;\n"
1.2       anton     438:     endif
                    439:     ?dup-if
1.3       anton     440:        ."   gforth_FP = fp+" .nb .\" ;\n"
1.2       anton     441:     endif
1.3       anton     442:     .\" }\n" ;
1.2       anton     443: 
1.40      anton     444: : scan-back { c-addr u1 c -- c-addr u2 }
                    445:     \ the last occurence of c in c-addr u1 is at u2-1; if it does not
                    446:     \ occur, u2=0.
                    447:     c-addr 1- c-addr u1 + 1- u-do
                    448:        i c@ c = if
                    449:            c-addr i over - 1+ unloop exit endif
                    450:     1 -loop
                    451:     c-addr 0 ;
                    452: 
                    453: : dirname ( c-addr1 u1 -- c-addr2 u2 )
                    454:     \ directory name of the file name c-addr1 u1, including the final "/".
                    455:     '/ scan-back ;
                    456: 
                    457: : basename ( c-addr1 u1 -- c-addr2 u2 )
                    458:     \ file name without directory component
                    459:     2dup dirname nip /string ;
1.16      anton     460: 
1.15      anton     461: : gen-filename ( x -- c-addr u )
1.35      anton     462:     \ generates a file basename for lib-handle-addr X
1.16      anton     463:     0 <<# ['] #s $10 base-execute #> 
1.35      anton     464:     s" gforth_c_" 2swap s+ #>> ;
                    465: 
1.43    ! anton     466: 2variable libcc-named-dir-v
        !           467: 
1.40      anton     468: : libcc-named-dir ( -- c-addr u )
1.43    ! anton     469:     libcc-named-dir-v 2@ ;
1.40      anton     470: 
                    471: : libcc-tmp-dir ( -- c-addr u )
1.41      anton     472:     s" ~/.gforth/libcc-tmp/" ;
1.40      anton     473: 
                    474: : prepend-dirname ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 )
1.41      anton     475:     2over s+ 2swap drop free throw ;
1.35      anton     476: 
1.42      anton     477: 0 value libcc-path
                    478: 
                    479: : open-wrappers ( -- addr|0 )
                    480:     lib-filename 2@ s" .la" s+
                    481:     2dup libcc-named-dir string-prefix? if ( c-addr u )
                    482:        \ see if we can open it in the path
                    483:        libcc-named-dir nip /string
                    484:        libcc-path open-path-file if
                    485:            0 exit endif
                    486:        ( wfile-id c-addr2 u2 ) rot close-file throw save-mem ( c-addr2 u2 )
                    487:     endif
                    488:     \ 2dup cr type
                    489:     2dup open-lib >r
                    490:     drop free throw r> ;
                    491: 
1.39      anton     492: : c-library-name-setup ( c-addr u -- )
1.35      anton     493:     assert( c-source-file-id @ 0= )
1.40      anton     494:     { d: filename }
1.37      anton     495:     here 0 , lib-handle-addr ! filename lib-filename 2!
1.40      anton     496:     filename basename lib-modulename 2! ;
1.39      anton     497:    
                    498: : c-library-name-create ( -- )
                    499:     lib-filename 2@ s" .c" s+ 2dup w/o create-file throw
                    500:     dup c-source-file-id !
                    501:     ['] print-c-prefix-lines swap outfile-execute
                    502:     drop free throw ;
                    503: 
1.40      anton     504: : c-named-library-name ( c-addr u -- )
1.39      anton     505:     \ set up filenames for a (possibly new) library; c-addr u is the
                    506:     \ basename of the library
1.40      anton     507:     libcc-named-dir prepend-dirname c-library-name-setup
1.37      anton     508:     open-wrappers dup if
                    509:        lib-handle-addr @ !
                    510:     else
1.39      anton     511:        drop c-library-name-create
1.37      anton     512:     endif ;
                    513: 
1.40      anton     514: : c-tmp-library-name ( c-addr u -- )
1.39      anton     515:     \ set up filenames for a new library; c-addr u is the basename of
                    516:     \ the library
1.40      anton     517:     libcc-tmp-dir prepend-dirname c-library-name-setup c-library-name-create ;
1.39      anton     518: 
1.37      anton     519: : lib-handle ( -- addr )
                    520:     lib-handle-addr @ @ ;
1.15      anton     521: 
1.12      anton     522: : init-c-source-file ( -- )
1.37      anton     523:     lib-handle 0= if
                    524:        c-source-file-id @ 0= if
1.40      anton     525:            here gen-filename c-tmp-library-name
1.37      anton     526:        endif
1.12      anton     527:     endif ;
1.11      anton     528: 
                    529: : c-source-file ( -- file-id )
1.12      anton     530:     c-source-file-id @ assert( dup ) ;
1.11      anton     531: 
1.37      anton     532: : notype-execute ( ... xt -- ... )
                    533:     what's type { oldtype } try
                    534:        ['] 2drop is type execute 0
                    535:     restore
                    536:        oldtype is type
                    537:     endtry
                    538:     throw ;
                    539: 
                    540: : c-source-file-execute ( ... xt -- ... )
                    541:     \ direct the output of xt to c-source-file, or nothing
                    542:     lib-handle if
                    543:        notype-execute
                    544:     else
                    545:        c-source-file outfile-execute
                    546:     endif ;
                    547: 
1.24      anton     548: : .lib-error ( -- )
                    549:     [ifdef] lib-error
                    550:         ['] cr stderr outfile-execute
1.31      anton     551:         lib-error ['] type stderr outfile-execute
1.24      anton     552:     [then] ;
1.23      anton     553: 
1.33      anton     554: DEFER compile-wrapper-function ( -- )
1.35      anton     555: : compile-wrapper-function1 ( -- )
1.37      anton     556:     lib-handle 0= if
                    557:        c-source-file close-file throw
                    558:        0 c-source-file-id !
                    559:        [ libtool-command s"  --silent --mode=compile gcc -I " s+
                    560:        s" includedir" getenv append ] sliteral
                    561:        s"  -O -c " s+ lib-filename 2@ append s" .c -o " append
                    562:        lib-filename 2@ append s" .lo" append ( c-addr u )
                    563:        \    cr 2dup type
                    564:        2dup system drop free throw $? abort" libtool compile failed"
                    565:        [ libtool-command s"  --silent --mode=link gcc -module -rpath " s+ ] sliteral
1.40      anton     566:        lib-filename 2@ dirname s+ s"  " append
1.37      anton     567:        lib-filename 2@ append s" .lo -o " append
                    568:        lib-filename 2@ append s" .la" append ( c-addr u )
                    569:        c-libs @ ['] append-l list-map
                    570:        \    2dup type cr
                    571:        2dup system drop free throw $? abort" libtool link failed"
                    572:        open-wrappers dup 0= if
                    573:            .lib-error true abort" open-lib failed"
                    574:        endif
                    575:        ( lib-handle ) lib-handle-addr @ !
1.23      anton     576:     endif
1.35      anton     577:     lib-filename 2@ drop free throw 0 0 lib-filename 2! ;
                    578: ' compile-wrapper-function1 IS compile-wrapper-function
1.5       anton     579: \    s" ar rcs xxx.a xxx.o" system
                    580: \    $? abort" ar generated error" ;
                    581: 
1.12      anton     582: : link-wrapper-function { cff -- sym }
                    583:     cff cff-rtype wrapper-function-name { d: wrapper-name }
1.23      anton     584:     wrapper-name cff cff-lha @ @ assert( dup ) lib-sym dup 0= if
1.24      anton     585:         .lib-error -&32 throw
1.23      anton     586:     endif
1.10      anton     587:     wrapper-name drop free throw ;
1.8       anton     588: 
1.12      anton     589: : c-function-ft ( xt-defr xt-cfr "c-name" "{libcc-type}" "--" "libcc-type" -- )
1.8       anton     590:     \ build time/first time action for c-function
1.12      anton     591:     init-c-source-file
                    592:     noname create 2, lib-handle-addr @ ,
1.2       anton     593:     parse-name { d: c-name }
1.8       anton     594:     here parse-function-types c-name string,
1.37      anton     595:     ['] gen-wrapper-function c-source-file-execute
1.8       anton     596:   does> ( ... -- ... )
1.10      anton     597:     dup 2@ { xt-defer xt-cfr }
1.12      anton     598:     dup cff-lha @ @ 0= if
                    599:        compile-wrapper-function
                    600:     endif
                    601:     link-wrapper-function xt-cfr >body !
1.8       anton     602:     xt-cfr xt-defer defer!
                    603:     xt-cfr execute ;
                    604: 
                    605: : c-function-rt ( -- )
                    606:     \ run-time definition for c function; addr is the address where
                    607:     \ the sym should be stored
                    608:     noname create 0 ,
1.2       anton     609:   does> ( ... -- ... )
                    610:     @ call-c ;
                    611: 
1.18      anton     612: : c-function ( "forth-name" "c-name" "@{type@}" "--" "type" -- ) \ gforth
1.17      anton     613:     \G Define a Forth word @i{forth-name}.  @i{Forth-name} has the
                    614:     \G specified stack effect and calls the C function @code{c-name}.
1.8       anton     615:     defer lastxt dup c-function-rt lastxt c-function-ft
                    616:     lastxt swap defer! ;
1.33      anton     617: 
                    618: : clear-libs ( -- )
                    619: \G Clear the list of libs
                    620:     c-source-file-id @ if
                    621:        compile-wrapper-function
                    622:     endif
                    623:     0 c-libs ! ;
                    624: clear-libs
1.35      anton     625: 
                    626: : c-library-incomplete ( -- )
                    627:     true abort" Called function of unfinished named C library" ;
                    628: 
                    629: : c-library-name ( c-addr u -- ) \ gforth
1.38      anton     630: \G Start a C library interface with name @i{c-addr u}.
1.35      anton     631:     clear-libs
                    632:     ['] c-library-incomplete is compile-wrapper-function
1.40      anton     633:     c-named-library-name ;
1.35      anton     634: 
                    635: : c-library ( "name" -- ) \ gforth
                    636: \G Parsing version of @code{c-library-name}
1.39      anton     637:     parse-name save-mem c-library-name ;
1.35      anton     638: 
1.38      anton     639: : end-c-library ( -- ) \ gforth
                    640: \G Finish and (if necessary) build the latest C library interface.
1.35      anton     641:     ['] compile-wrapper-function1 is compile-wrapper-function
                    642:     compile-wrapper-function1 ;
1.43    ! anton     643: 
        !           644: : init-libcc ( -- )
        !           645:     s" ~/.gforth/libcc-named/" libcc-named-dir-v 2!
        !           646:     make-path to libcc-path
        !           647:     libcc-named-dir libcc-path also-path
        !           648:     [ s" libccdir" getenv ] sliteral libcc-path also-path
        !           649: ;
        !           650: 
        !           651: init-libcc
        !           652: 
        !           653: :noname ( -- )
        !           654:     defers 'cold
        !           655:     init-libcc ;
        !           656: is 'cold

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