[gforth] / gforth / libcc.fs  

gforth: gforth/libcc.fs

Diff for /gforth/libcc.fs between version 1.3 and 1.23

version 1.3, Wed Dec 27 13:01:20 2006 UTC version 1.23, Tue Dec 4 14:55:03 2007 UTC
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 \ What this implementation does is this: if it sees a declaration like  \ What this implementation does is this: if it sees a declaration like
   
 \ \ something that tells it to include <unistd.h>  
 \ \ something that tells it that the current library is libc  \ \ something that tells it that the current library is libc
   \ \c #include <unistd.h>
 \ c-function dlseek lseek n d n -- d  \ c-function dlseek lseek n d n -- d
   
 \ it genererates C code similar to the following:  \ it genererates C code similar to the following:
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 \ the function pointer of gforth_c_lseek_ndn_d on the stack and  \ the function pointer of gforth_c_lseek_ndn_d on the stack and
 \ calls CALL-C.  \ calls CALL-C.
   
   \ ToDo:
   
   \ Batching, caching and lazy evaluation:
   
   \ Batching:
   
   \ New words are deferred, and the corresponding C functions are
   \ collected in one file, until the first word is EXECUTEd; then the
   \ file is compiled and linked into the system, and the word is
   \ resolved.
   
   \ Caching:
   
   \ Instead of compiling all this stuff anew for every execution, we
   \ keep the files around and have an index file containing the function
   \ names and their corresponding .so files.  If the needed wrapper name
   \ is already present, it is just linked instead of generating the
   \ wrapper again.  This is all done by loading the index file(s?),
   \ which define words for the wrappers in a separate wordlist.
   
   \ The files are built in .../lib/gforth/$VERSION/libcc/ or
   \ ~/.gforth/libcc/$HOST/.
   
 \ other things to do:  \ other things to do:
   
 \ c-variable forth-name c-name  \ c-variable forth-name c-name
 \ c-constant forth-name c-name  \ c-constant forth-name c-name
   
   \ Todo: conversion between function pointers and xts (both directions)
   
   \ taking an xt and turning it into a function pointer:
   
   \ e.g., assume we have the xt of + and want to create a C function int
   \ gforth_callback_plus(int, int), and then pass the pointer to that
   \ function:
   
   \ There should be Forth code like this:
   \   ] + 0 (bye)
   \ Assume that the start of this code is START
   
   \ Now, there should be a C function:
   
   \ int gforth_callback_plus(int p1, int p2)
   \ {
   \   Cell   *sp = gforth_SP;
   \   Float  *fp = gforth_FP;
   \   Float  *fp = gforth_FP;
   \   Address lp = gforth_LP;
   \   sp -= 2;
   \   sp[0] = p1;
   \   sp[1] = p2;
   \   gforth_engine(START, sp, rp, fp, lp);
   \   sp += 1;
   \   gforth_RP = rp;
   \   gforth_SP = sp;
   \   gforth_FP = fp;
   \   gforth_LP = lp;
   \   return sp[0];
   \ }
   
   \ and the pointer to that function is the C function pointer for the XT of +.
   
   \ Future problems:
   \   how to combine the Forth code generation with inlining
   \   START is not a constant across executions (when caching the C files)
   \      Solution: make START a variable, and store into it on startup with dlsym
   
   \ Syntax:
   \  callback <rettype> <params> <paramtypes> -- <rettype>
   
   
 \ data structures  \ data structures
   
 \ c-function word body:  \ For every c-function, we have three words: two anonymous words
 \  cell function pointer  \ created by c-function-ft (first time) and c-function-rt (run-time),
 \  char return type index  \ and a named deferred word.  The deferred word first points to the
 \  char parameter count n  \ first-time word, then to the run-time word; the run-time word calls
 \  char*n parameters (type indices)  \ the c function.
   
   : delete-file 2drop 0 ;
   
   require struct.fs
   
       \ counted-string
   
   \ c-function-ft word body:
   struct
       cell% field cff-cfr \ xt of c-function-rt word
       cell% field cff-deferred \ xt of c-function deferred word
       cell% field cff-lha \ address of the lib-handle for the lib that
                           \ contains the wrapper function of the word
       char% field cff-rtype  \ return type
       char% field cff-np     \ number of parameters
       1 0   field cff-ptypes \ #npar parameter types
 \  counted string: c-name  \  counted string: c-name
   end-struct cff%
   
   variable c-source-file-id \ contains the source file id of the current batch
   0 c-source-file-id !
   variable lib-handle-addr \ points to the library handle of the current batch.
                            \ the library handle is 0 if the current
                            \ batch is not yet compiled.
   2variable lib-filename   \ filename without extension
   2variable lib-modulename \ basename of the file without extension
   
 : .nb ( n -- )  : .nb ( n -- )
     0 .r ;      0 .r ;
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 : const+ ( n1 "name" -- n2 )  : const+ ( n1 "name" -- n2 )
     dup constant 1+ ;      dup constant 1+ ;
   
   : front-string { c-addr1 u1 c-addr2 u2 -- c-addr3 u3 }
       \ insert string c-addr2 u2 in buffer c-addr1 u1; c-addr3 u3 is the
       \ remainder of the buffer.
       assert( u1 u2 u>= )
       c-addr2 c-addr1 u2 move
       c-addr1 u1 u2 /string ;
   
   : front-char { c-addr1 u1 c -- c-addr3 u2 }
       \ insert c in buffer c-addr1 u1; c-addr3 u3 is the remainder of
       \ the buffer.
       assert( u1 0 u> )
       c c-addr1 c!
       c-addr1 u1 1 /string ;
   
   : s+ { addr1 u1 addr2 u2 -- addr u }
       u1 u2 + allocate throw { addr }
       addr1 addr u1 move
       addr2 addr u1 + u2 move
       addr u1 u2 +
   ;
   
   : append { addr1 u1 addr2 u2 -- addr u }
       addr1 u1 u2 + dup { u } resize throw { addr }
       addr2 addr u1 + u2 move
       addr u ;
   
   \ linked list stuff (should go elsewhere)
   
   struct
       cell% field list-next
       1 0   field list-payload
   end-struct list%
   
   : list-insert { node list -- }
       list list-next @ node list-next !
       node list list-next ! ;
   
   : list-append { node endlistp -- }
       \ insert node at place pointed to by endlistp
       node endlistp @ list-insert
       node list-next endlistp ! ;
   
   : list-map ( ... list xt -- ... )
       \ xt ( ... node -- ... )
       { xt } begin { node }
           node while
               node xt execute
               node list-next @
       repeat ;
   
   \ C prefix lines
   
   \ linked list of longcstrings: [ link | count-cell | characters ]
   
   list%
       cell% field c-prefix-count
       1 0   field c-prefix-chars
   end-struct c-prefix%
   
   variable c-prefix-lines 0 c-prefix-lines !
   variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end !
   
   : print-c-prefix-line ( node -- )
       dup c-prefix-chars swap c-prefix-count @ type cr ;
   
   : print-c-prefix-lines ( -- )
       c-prefix-lines @ ['] print-c-prefix-line list-map ;
   
   : save-c-prefix-line ( c-addr u -- )
       c-source-file-id @ ?dup-if
           >r 2dup r> write-line throw
       then
       align here 0 , c-prefix-lines-end list-append ( c-addr u )
       longstring, ;
   
   : \c ( "rest-of-line" -- ) \ gforth backslash-c
       \G One line of C declarations for the C interface
       -1 parse save-c-prefix-line ;
   
   s" #include <gforth/" version-string s+ s" /libcc.h>" append ( c-addr u )
     2dup save-c-prefix-line drop free throw
   
   \ Types (for parsing)
   
 wordlist constant libcc-types  wordlist constant libcc-types
   
 get-current libcc-types set-current  get-current libcc-types set-current
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 -1  -1
 const+ -- \ end of arguments  const+ -- \ end of arguments
 const+ n \ integer cell  const+ n \ integer cell
 const+ p \ pointer cell  const+ a \ address cell
 const+ d \ double  const+ d \ double
 const+ r \ float  const+ r \ float
 const+ func \ C function pointer  const+ func \ C function pointer
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     parse-libcc-type dup 0< -32 and throw swap c! ;      parse-libcc-type dup 0< -32 and throw swap c! ;
   
 : type-letter ( n -- c )  : type-letter ( n -- c )
     chars s" npdrfv" drop + c@ ;      chars s" nadrfv" drop + c@ ;
   
 \ count-stacks  \ count-stacks
   
 : count-stacks-n ( fp-change1 sp-change1 -- fp-change2 sp-change2 )  : count-stacks-n ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
     1+ ;      1+ ;
   
 : count-stacks-p ( fp-change1 sp-change1 -- fp-change2 sp-change2 )  : count-stacks-a ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
     1+ ;      1+ ;
   
 : count-stacks-d ( fp-change1 sp-change1 -- fp-change2 sp-change2 )  : count-stacks-d ( fp-change1 sp-change1 -- fp-change2 sp-change2 )
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 create count-stacks-types  create count-stacks-types
 ' count-stacks-n ,  ' count-stacks-n ,
 ' count-stacks-p ,  ' count-stacks-a ,
 ' count-stacks-d ,  ' count-stacks-d ,
 ' count-stacks-r ,  ' count-stacks-r ,
 ' count-stacks-func ,  ' count-stacks-func ,
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 \ gen-pars  \ gen-pars
   
 : gen-par-n ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )  : gen-par-n ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
     1- dup ." sp[" .nb ." ]" ;      ." sp[" 1- dup .nb ." ]" ;
   
 : gen-par-p ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )  : gen-par-a ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
     ." (void *)(" gen-par-n ." )" ;      ." (void *)(" gen-par-n ." )" ;
   
 : gen-par-d ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )  : gen-par-d ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
     ." gforthd2ll(" gen-par-n ." ," gen-par-n ." )" ;      ." gforth_d2ll(" gen-par-n ." ," gen-par-n ." )" ;
   
 : gen-par-r ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )  : gen-par-r ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
     swap 1- tuck ." fp[" .nb ." ]" ;      swap 1- tuck ." fp[" .nb ." ]" ;
   
 : gen-par-func ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )  : gen-par-func ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
     gen-par-p ;      gen-par-a ;
   
 : gen-par-void ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )  : gen-par-void ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 )
     -32 throw ;      -32 throw ;
   
 create gen-par-types  create gen-par-types
 ' gen-par-n ,  ' gen-par-n ,
 ' gen-par-p ,  ' gen-par-a ,
 ' gen-par-d ,  ' gen-par-d ,
 ' gen-par-r ,  ' gen-par-r ,
 ' gen-par-func ,  ' gen-par-func ,
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     2dup 2>r gen-wrapped-call 2r> ;      2dup 2>r gen-wrapped-call 2r> ;
   
 : gen-wrapped-n ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )  : gen-wrapped-n ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
     1- dup ." sp[" .nb ." ]=" gen-wrapped-void ;      2dup gen-par-n 2>r ." =" gen-wrapped-call 2r> ;
   
 : gen-wrapped-p ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )  : gen-wrapped-a ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
     1- dup ." sp[" .nb ." ]=(Cell)" gen-wrapped-void ;      2dup gen-par-n 2>r ." =(Cell)" gen-wrapped-call 2r> ;
   
 : gen-wrapped-d ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )  : gen-wrapped-d ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
     ." gforth_ll2d(" gen-wrapped-void      ." gforth_ll2d(" gen-wrapped-void
     ." ,sp[" 1- dup .nb ." ],sp[" 1- dup .nb ." ])" ;      ." ," gen-par-n ." ," gen-par-n ." )" ;
   
 : gen-wrapped-r ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )  : gen-wrapped-r ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
     swap 1- tuck ." fp[" .nb ." ]=" gen-wrapped-void ;      2dup gen-par-r 2>r ." =" gen-wrapped-void 2r> ;
   
 : gen-wrapped-func ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )  : gen-wrapped-func ( pars c-name fp-change1 sp-change1 -- fp-change sp-change )
     gen-wrapped-p ;      gen-wrapped-a ;
   
 create gen-wrapped-types  create gen-wrapped-types
 ' gen-wrapped-n ,  ' gen-wrapped-n ,
 ' gen-wrapped-p ,  ' gen-wrapped-a ,
 ' gen-wrapped-d ,  ' gen-wrapped-d ,
 ' gen-wrapped-r ,  ' gen-wrapped-r ,
 ' gen-wrapped-func ,  ' gen-wrapped-func ,
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 : gen-wrapped-stmt ( pars c-name fp-change1 sp-change1 ret -- fp-change sp-change )  : gen-wrapped-stmt ( pars c-name fp-change1 sp-change1 ret -- fp-change sp-change )
     cells gen-wrapped-types + @ execute ;      cells gen-wrapped-types + @ execute ;
   
 : gen-wrapper-function ( addr -- )  : wrapper-function-name ( addr -- c-addr u )
     \ addr points to the return type index of a c-function descriptor      \ addr points to the return type index of a c-function descriptor
     c@+ { ret } count 2dup { d: pars } chars + count { d: c-name }      count { r-type } count { d: pars }
     ." void gforth_c_" c-name type ." _"      pars + count { d: c-name }
     pars 0 +do      s" gforth_c_" { d: prefix }
         i chars over + c@ type-letter emit      prefix nip c-name nip + pars nip + 3 + { u }
       u allocate throw { c-addr }
       c-addr u
       prefix front-string c-name front-string '_ front-char
       pars bounds u+do
           i c@ type-letter front-char
     loop      loop
     ." _" ret type-letter emit .\" (void)\n"      '_ front-char r-type type-letter front-char assert( dup 0= )
     .\" {\n  Cell *sp = gforth_SP;\n  Float *fp = gforth_FP;\n  "      2drop c-addr u ;
   
   : gen-wrapper-function ( addr -- )
       \ addr points to the return type index of a c-function descriptor
       dup { descriptor }
       count { ret } count 2dup { d: pars } chars + count { d: c-name }
       ." void " lib-modulename 2@ type ." _LTX_" descriptor wrapper-function-name 2dup type drop free throw
       .\" (void)\n"
       .\" {\n  Cell MAYBE_UNUSED *sp = gforth_SP;\n  Float MAYBE_UNUSED *fp = gforth_FP;\n  "
     pars c-name 2over count-stacks ret gen-wrapped-stmt .\" ;\n"      pars c-name 2over count-stacks ret gen-wrapped-stmt .\" ;\n"
     ?dup-if      ?dup-if
         ."   gforth_SP = sp+" .nb .\" ;\n"          ."   gforth_SP = sp+" .nb .\" ;\n"
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     endif      endif
     .\" }\n" ;      .\" }\n" ;
   
 : c-function ( "forth-name" "c-name" "{libcc-type}" "--" "libcc-type" -- )  : tempdir ( -- c-addr u )
     create here >r 0 , \ place for the wrapper function pointer      s" TMPDIR" getenv dup 0= if
           2drop s" /tmp"
       then ;
   
   : gen-filename ( x -- c-addr u )
       \ generates a filename without extension for lib-handle-addr X
       0 <<# ['] #s $10 base-execute #>
       tempdir s" /gforth_c_" s+ 2swap append #>> ;
   
   : init-c-source-file ( -- )
       c-source-file-id @ 0= if
           here 0 , dup lib-handle-addr ! gen-filename 2dup lib-filename 2!
           2dup tempdir nip 1+ /string lib-modulename 2!
           s" .c" s+ 2dup w/o create-file throw dup c-source-file-id !
           ['] print-c-prefix-lines swap outfile-execute
           drop free throw
       endif ;
   
   : c-source-file ( -- file-id )
       c-source-file-id @ assert( dup ) ;
   
   \ libtool --mode=compile gcc -I /nfs/a5/anton/gforth-amd64/include -O -c /tmp/gforth_c_2AAAAB2E7C50.c -o /tmp/gforth_c_2AAAAB2E7C50.lo
   \ libtool --mode=link gcc -module -rpath /tmp /tmp/gforth_c_2AAAAB2E7C50.lo -o /tmp/gforth_c_2AAAAB2E7C50.la
   
   DEFER compile-wrapper-function
   :NONAME ( -- )
       c-source-file close-file throw
       0 c-source-file-id !
       [ s" libtool --silent --mode=compile gcc -I "
         s" includedir" getenv append ] sliteral
       s"  -O -c " s+ lib-filename 2@ append s" .c -o " append
       lib-filename 2@ append s" .lo" append ( c-addr u )
       2dup system drop free throw $? abort" libtool compile failed"
       s" libtool --silent --mode=link gcc -module -rpath " tempdir s+ s"  " append
       lib-filename 2@ append s" .lo -o " append
       lib-filename 2@ append s" .la" append ( c-addr u )
       2dup system drop free throw $? abort" libtool link failed"
       lib-filename 2@ s" .la" s+
       2dup open-lib dup 0= if
           cr lib-error type true abort" open-lib failed"
       endif
       ( lib-handle ) lib-handle-addr @ !
       2dup delete-file throw drop free throw
       lib-filename 2@ s" .c" s+ 2dup delete-file throw drop free throw
       lib-filename 2@ drop free throw 0 0 lib-filename 2! ; IS compile-wrapper-function
   \    s" ar rcs xxx.a xxx.o" system
   \    $? abort" ar generated error" ;
   
   : link-wrapper-function { cff -- sym }
       cff cff-rtype wrapper-function-name { d: wrapper-name }
       wrapper-name cff cff-lha @ @ assert( dup ) lib-sym dup 0= if
           cr lib-error type -&32 throw
       endif
       wrapper-name drop free throw ;
   
   : c-function-ft ( xt-defr xt-cfr "c-name" "{libcc-type}" "--" "libcc-type" -- )
       \ build time/first time action for c-function
       init-c-source-file
       noname create 2, lib-handle-addr @ ,
     parse-name { d: c-name }      parse-name { d: c-name }
     parse-function-types c-name string,      here parse-function-types c-name string,
     r> cell+ gen-wrapper-function      ['] gen-wrapper-function c-source-file outfile-execute
 \    compile-wrapper-function    does> ( ... -- ... )
 \    link-wrapper-function      dup 2@ { xt-defer xt-cfr }
 \    r> !      dup cff-lha @ @ 0= if
           compile-wrapper-function
       endif
       link-wrapper-function xt-cfr >body !
       xt-cfr xt-defer defer!
       xt-cfr execute ;
   
   : c-function-rt ( -- )
       \ run-time definition for c function; addr is the address where
       \ the sym should be stored
       noname create 0 ,
   does> ( ... -- ... )    does> ( ... -- ... )
     @ call-c ;      @ call-c ;
   
   : c-function ( "forth-name" "c-name" "@{type@}" "--" "type" -- ) \ gforth
       \G Define a Forth word @i{forth-name}.  @i{Forth-name} has the
       \G specified stack effect and calls the C function @code{c-name}.
       defer lastxt dup c-function-rt lastxt c-function-ft
 s" Library not found" exception constant err-nolib      lastxt swap defer! ;
   
 : library ( "name" "file" -- ) \ gforth  
 \G Dynamically links the library specified by @i{file}.  Defines a  
 \G word @i{name} ( -- lib ) that starts the declaration of a  
 \G function from that library.  
     create parse-name open-lib dup 0= err-nolib and throw ,  
   does> ( -- lib )  
     @ ;  
   
 \ test  
   
 cr .( #include "engine/forth.h")  
 cr .( #include <unistd.h>)  
 cr ." typedef void (* func)(int);  
 cr ." int test1(int,char*,long,double,void (*)(int));"  
 cr ." Cell *test2(void);"  
 cr ." int test3(void);"  
 cr ." float test4(void);"  
 cr ." func test5(void);"  
 cr ." void test6(void);"  
 cr  
   
 c-function dlseek lseek n d n -- d  
 c-function n test1 n p d r func -- n  
 c-function p test2 -- p  
 c-function d test3 -- d  
 c-function r test4 -- r  
 c-function func test5 -- func  
 c-function void test6 -- void  

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  Added in v.1.23
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