Diff for /gforth/libcc.fs between versions 1.7 and 1.23

version 1.7, 2007/02/10 15:30:15 version 1.23, 2007/12/04 14:55:03
Line 73 Line 73
 \ 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.
 \  counted string: c-name  
   : 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
   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 ;
Line 89 Line 156
 : const+ ( n1 "name" -- n2 )  : const+ ( n1 "name" -- n2 )
     dup constant 1+ ;      dup constant 1+ ;
   
 \ linked list stuff (should go elsewhere)  : 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 +
   ;
   
 hex  : append { addr1 u1 addr2 u2 -- addr u }
       addr1 u1 u2 + dup { u } resize throw { addr }
       addr2 addr u1 + u2 move
       addr u ;
   
 require struct.fs  \ linked list stuff (should go elsewhere)
   
 struct  struct
     cell% field list-next      cell% field list-next
Line 129  end-struct c-prefix% Line 218  end-struct c-prefix%
 variable c-prefix-lines 0 c-prefix-lines !  variable c-prefix-lines 0 c-prefix-lines !
 variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end !  variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end !
   
 : save-c-prefix-line ( c-addr u -- )  
     align here 0 , c-prefix-lines-end list-append ( c-addr u )  
     longstring, ;  
   
 : \c ( "rest-of-line" -- )  
     -1 parse save-c-prefix-line ;  
   
 : print-c-prefix-line ( node -- )  : print-c-prefix-line ( node -- )
     dup c-prefix-chars swap c-prefix-count @ type cr ;      dup c-prefix-chars swap c-prefix-count @ type cr ;
   
 : print-c-prefix-lines ( -- )  : print-c-prefix-lines ( -- )
     c-prefix-lines @ ['] print-c-prefix-line list-map ;      c-prefix-lines @ ['] print-c-prefix-line list-map ;
   
 \c #include "engine/libcc.h"  : 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 ;
   
 print-c-prefix-lines  s" #include <gforth/" version-string s+ s" /libcc.h>" append ( c-addr u )
     2dup save-c-prefix-line drop free throw
   
 \ Types (for parsing)  \ Types (for parsing)
   
Line 288  create gen-wrapped-types Line 380  create gen-wrapped-types
 : 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 }
     print-c-prefix-lines      pars + count { d: c-name }
     ." void gforth_c_" c-name type ." _"      s" gforth_c_" { d: prefix }
       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      pars bounds u+do
         i c@ type-letter emit          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= )
       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  "      .\" {\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
Line 307  create gen-wrapped-types Line 411  create gen-wrapped-types
     endif      endif
     .\" }\n" ;      .\" }\n" ;
   
 : compile-wrapper-function ( -- )  : tempdir ( -- c-addr u )
     s" gcc -fPIC -shared -Wl,-soname,xxx.so.1 -Wl,-export_dynamic -o xxx.so.1 -O xxx.c" system      s" TMPDIR" getenv dup 0= if
     $? abort" compiler generated error" ;          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  \    s" ar rcs xxx.a xxx.o" system
 \    $? abort" ar generated error" ;  \    $? abort" ar generated error" ;
   
 : link-wrapper-function ( -- )  : link-wrapper-function { cff -- sym }
     s" /home/anton/gforth/xxx.so.1" open-lib ( lib-handle )      cff cff-rtype wrapper-function-name { d: wrapper-name }
     s" gforth_c_strlen_a_n" rot lib-sym dup 0= -32 and throw ;      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 ( "forth-name" "c-name" "{libcc-type}" "--" "libcc-type" -- )  : c-function-ft ( xt-defr xt-cfr "c-name" "{libcc-type}" "--" "libcc-type" -- )
     create here >r 0 , \ place for the wrapper function pointer      \ 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 c-source-file outfile-execute
     s" xxx.c" w/o create-file throw ( file-id )    does> ( ... -- ... )
     dup >r >outfile gen-wrapper-function outfile<      dup 2@ { xt-defer xt-cfr }
     r> close-file throw      dup cff-lha @ @ 0= if
     compile-wrapper-function          compile-wrapper-function
     link-wrapper-function      endif
     r> !      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  
   
 \ test all parameter and return types  
   
 \ cr .( #include "engine/libcc.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 a d r func -- n  
 \ c-function a test2 -- a  
 \ c-function d test3 -- d  
 \ c-function r test4 -- r  
 \ c-function func test5 -- func  
 \ c-function void test6 -- void  
   
 \c #include <string.h>  
   
 c-function strlen strlen a -- n  
   
 cr s\" fooo\0" 2dup dump drop .s strlen cr .s cr  

Removed from v.1.7  
changed lines
  Added in v.1.23


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