\ lib.fs shared library support package 16aug03py
\ Copyright (C) 1995,1996,1997,1998,2000,2003,2005,2006,2007 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation, either version 3
\ of the License, or (at your option) any later version.
\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\ GNU General Public License for more details.
\ You should have received a copy of the GNU General Public License
\ along with this program. If not, see http://www.gnu.org/licenses/.
\ replacements for former primitives
c-library fflib
s" avcall" add-lib
s" callback" add-lib
\c #include <avcall.h>
\c #include <callback.h>
\c static av_alist alist;
\c static va_alist gforth_clist;
\c static float frv;
\c static int irv;
\c static double drv;
\c static long long llrv;
\c static void * prv;
\c static Cell *gforth_RP;
\c static char *gforth_LP;
\c typedef void *Label;
\c typedef Label *Xt;
\c Label *gforth_engine(Xt *ip, Cell *sp, Cell *rp0, Float *fp, char *lp);
\c
\c void gforth_callback_ffcall(Xt* fcall, void * alist)
\c {
\c /* save global valiables */
\c Cell *rp = gforth_RP;
\c Cell *sp = gforth_SP;
\c Float *fp = gforth_FP;
\c char *lp = gforth_LP;
\c va_alist clist = gforth_clist;
\c
\c gforth_clist = (va_alist)alist;
\c
\c gforth_engine(fcall, sp, rp, fp, lp);
\c
\c /* restore global variables */
\c gforth_RP = rp;
\c gforth_SP = sp;
\c gforth_FP = fp;
\c gforth_LP = lp;
\c gforth_clist = clist;
\c }
\c #define av_start_void1(c_addr) av_start_void(alist, c_addr)
c-function av-start-void av_start_void1 a -- void
\c #define av_start_int1(c_addr) av_start_int(alist, c_addr, &irv)
c-function av-start-int av_start_int1 a -- void
\c #define av_start_float1(c_addr) av_start_float(alist, c_addr, &frv)
c-function av-start-float av_start_float1 a -- void
\c #define av_start_double1(c_addr) av_start_double(alist, c_addr, &drv)
c-function av-start-double av_start_double1 a -- void
\c #define av_start_longlong1(c_addr) av_start_longlong(alist, c_addr, &llrv)
c-function av-start-longlong av_start_longlong1 a -- void
\c #define av_start_ptr1(c_addr) av_start_ptr(alist, c_addr, void *, &prv)
c-function av-start-ptr av_start_ptr1 a -- void
\c #define av_int1(w) av_int(alist,w)
c-function av-int av_int1 n -- void
\c #define av_float1(r) av_float(alist,r)
c-function av-float av_float1 r -- void
\c #define av_double1(r) av_double(alist,r)
c-function av-double av_double1 r -- void
\c #define av_longlong1(d) av_longlong(alist,d)
c-function av-longlong av_longlong1 d -- void
\c #define av_ptr1(a) av_ptr(alist, void *, a)
c-function av-ptr av_ptr1 a -- void
\c #define av_call_void() av_call(alist)
c-function av-call-void av_call_void -- void
\c #define av_call_int() (av_call(alist), irv)
c-function av-call-int av_call_int -- n
\c #define av_call_float() (av_call(alist), frv)
c-function av-call-float av_call_float -- r
\c #define av_call_double() (av_call(alist), drv)
c-function av-call-double av_call_double -- r
\c #define av_call_longlong() (av_call(alist), llrv)
c-function av-call-longlong av_call_longlong -- d
\c #define av_call_ptr() (av_call(alist), prv)
c-function av-call-ptr av_call_ptr -- a
\c #define alloc_callback1(a_ip) alloc_callback(gforth_callback_ffcall, (Xt *)a_ip)
c-function alloc-callback alloc_callback1 a -- a
\c #define va_start_void1() va_start_void(gforth_clist)
c-function va-start-void va_start_void1 -- void
\c #define va_start_int1() va_start_int(gforth_clist)
c-function va-start-int va_start_int1 -- void
\c #define va_start_longlong1() va_start_longlong(gforth_clist)
c-function va-start-longlong va_start_longlong1 -- void
\c #define va_start_ptr1() va_start_ptr(gforth_clist, (char *))
c-function va-start-ptr va_start_ptr1 -- void
\c #define va_start_float1() va_start_float(gforth_clist)
c-function va-start-float va_start_float1 -- void
\c #define va_start_double1() va_start_double(gforth_clist)
c-function va-start-double va_start_double1 -- void
\c #define va_arg_int1() va_arg_int(gforth_clist)
c-function va-arg-int va_arg_int1 -- n
\c #define va_arg_longlong1() va_arg_longlong(gforth_clist)
c-function va-arg-longlong va_arg_longlong1 -- d
\c #define va_arg_ptr1() va_arg_ptr(gforth_clist, char *)
c-function va-arg-ptr va_arg_ptr1 -- a
\c #define va_arg_float1() va_arg_float(gforth_clist)
c-function va-arg-float va_arg_float1 -- r
\c #define va_arg_double1() va_arg_double(gforth_clist)
c-function va-arg-double va_arg_double1 -- r
\c #define va_return_void1() va_return_void(gforth_clist)
c-function va-return-void1 va_return_void1 -- void
\c #define va_return_int1(w) va_return_int(gforth_clist,w)
c-function va-return-int1 va_return_int1 n -- void
\c #define va_return_ptr1(w) va_return_ptr(gforth_clist, void *, w)
c-function va-return-ptr1 va_return_ptr1 a -- void
\c #define va_return_longlong1(d) va_return_longlong(gforth_clist,d)
c-function va-return-longlong1 va_return_longlong1 d -- void
\c #define va_return_float1(r) va_return_float(gforth_clist,r)
c-function va-return-float1 va_return_float1 r -- void
\c #define va_return_double1(r) va_return_double(gforth_clist,r)
c-function va-return-double1 va_return_double1 r -- void
end-c-library
: av-int-r 2r> >r av-int ;
: av-float-r f@local0 lp+ av-float ;
: av-double-r f@local0 lp+ av-double ;
: av-longlong-r r> 2r> rot >r av-longlong ;
: av-ptr-r 2r> >r av-ptr ;
: va-return-void va-return-void1 0 (bye) ;
: va-return-int va-return-int1 0 (bye) ;
: va-return-ptr va-return-ptr1 0 (bye) ;
: va-return-longlong va-return-longlong1 0 (bye) ;
: va-return-float va-return-float1 0 (bye) ;
: va-return-double va-return-double1 0 (bye) ;
\ start of fflib proper
Variable libs 0 libs !
\ links between libraries
Variable thisproc
Variable thislib
Variable revdec revdec off
\ turn revdec on to compile bigFORTH libraries
Variable revarg revarg off
\ turn revarg on to compile declarations with reverse arguments
Variable legacy legacy off
\ turn legacy on to compile bigFORTH legacy libraries
Vocabulary c-decl
Vocabulary cb-decl
: @lib ( lib -- )
\G obtains library handle
cell+ dup 2 cells + count open-lib
dup 0= abort" Library not found" swap ! ;
: @proc ( lib addr -- )
\G obtains symbol address
cell+ tuck cell+ @ count rot cell+ @
lib-sym dup 0= abort" Proc not found!" swap ! ;
: proc, ( lib -- )
\G allocates and initializes proc stub
\G stub format:
\G linked list in library
\G address of proc
\G ptr to OS name of symbol as counted string
\G threaded code for invocation
here dup thisproc !
swap 2 cells + dup @ A, !
0 , 0 A, ;
Defer legacy-proc ' noop IS legacy-proc
: proc: ( lib "name" -- )
\G Creates a named proc stub
Create proc, 0 also c-decl
legacy @ IF legacy-proc THEN
DOES> ( x1 .. xn -- r )
dup cell+ @ swap 3 cells + >r ;
Variable ind-call ind-call off
: fptr ( "name" -- )
Create here thisproc ! 0 , 0 , 0 , 0 also c-decl ind-call on
DOES> 3 cells + >r ;
: library ( "name" "file" -- )
\G loads library "file" and creates a proc defining word "name"
\G library format:
\G linked list of libraries
\G library handle
\G linked list of library's procs
\G OS name of library as counted string
Create here libs @ A, dup libs !
0 , 0 A, parse-name string, @lib
DOES> ( -- ) dup thislib ! proc: ;
: init-shared-libs ( -- )
defers 'cold
0 libs BEGIN
@ dup WHILE
dup REPEAT
drop BEGIN
dup WHILE
>r
r@ @lib
r@ 2 cells + BEGIN
@ dup WHILE
r@ over @proc REPEAT
drop rdrop
REPEAT
drop ;
' init-shared-libs IS 'cold
: argtype ( revxt pushxt fwxt "name" -- )
Create , , , ;
: arg@ ( arg -- argxt pushxt )
revarg @ IF 2 cells + @ ['] noop swap ELSE 2@ THEN ;
: arg, ( xt -- )
dup ['] noop = IF drop EXIT THEN compile, ;
: decl, ( 0 arg1 .. argn call start -- )
2@ compile, >r
revdec @ IF 0 >r
BEGIN dup WHILE >r REPEAT
BEGIN r> dup WHILE arg@ arg, REPEAT drop
BEGIN dup WHILE arg, REPEAT drop
ELSE 0 >r
BEGIN dup WHILE arg@ arg, >r REPEAT drop
BEGIN r> dup WHILE arg, REPEAT drop
THEN
r> compile, postpone EXIT ;
: symbol, ( "c-symbol" -- )
here thisproc @ 2 cells + ! parse-name s,
thislib @ thisproc @ @proc ;
: rettype ( endxt startxt "name" -- )
Create 2,
DOES> decl, ind-call @ 0= IF symbol, THEN
previous revarg off ind-call off ;
also c-decl definitions
: <rev> revarg on ;
' av-int ' av-int-r ' >r argtype int
' av-float ' av-float-r ' f>l argtype sf
' av-double ' av-double-r ' f>l argtype df
' av-longlong ' av-longlong-r ' 2>r argtype dlong
' av-ptr ' av-ptr-r ' >r argtype ptr
' av-call-void ' av-start-void rettype (void)
' av-call-int ' av-start-int rettype (int)
' av-call-float ' av-start-float rettype (sf)
' av-call-double ' av-start-double rettype (fp)
' av-call-longlong ' av-start-longlong rettype (dlong)
' av-call-ptr ' av-start-ptr rettype (ptr)
: (addr) postpone EXIT drop symbol, previous revarg off ;
previous definitions
\ legacy support for old library interfaces
\ interface to old vararg stuff not implemented yet
also c-decl
:noname ( n 0 -- 0 int1 .. intn )
legacy @ 0< revarg !
swap 0 ?DO int LOOP (int)
; IS legacy-proc
: (int) ( n -- )
>r ' execute r> 0 ?DO int LOOP (int) ;
: (void) ( n -- )
>r ' execute r> 0 ?DO int LOOP (void) ;
: (float) ( n -- )
>r ' execute r> 0 ?DO df LOOP (fp) ;
previous
\ callback stuff
Variable callbacks
\G link between callbacks
: callback ( -- )
Create 0 ] postpone >r also cb-decl
DOES>
Create here >r 0 , callbacks @ A, r@ callbacks !
swap postpone Literal postpone call , postpone EXIT
r> dup cell+ cell+ alloc-callback swap !
DOES> @ ;
: callback; ( 0 xt1 .. xtn -- )
BEGIN over WHILE compile, REPEAT
postpone r> postpone execute compile, drop
postpone EXIT postpone [ previous ; immediate
: va-ret ( xt xt -- )
Create A, A, immediate
DOES> 2@ compile, ;
: init-callbacks ( -- )
defers 'cold callbacks 1 cells -
BEGIN cell+ @ dup WHILE dup cell+ cell+ alloc-callback over !
REPEAT drop ;
' init-callbacks IS 'cold
also cb-decl definitions
\ arguments
' va-arg-int Alias int
' va-arg-float Alias sf
' va-arg-double Alias df
' va-arg-longlong Alias dlong
' va-arg-ptr Alias ptr
' va-return-void ' va-start-void va-ret (void)
' va-return-int ' va-start-int va-ret (int)
' va-return-float ' va-start-float va-ret (sf)
' va-return-double ' va-start-double va-ret (fp)
' va-return-longlong ' va-start-longlong va-ret (dlong)
' va-return-ptr ' va-start-ptr va-ret (ptr)
previous definitions
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>