| \ libcc.fs foreign function interface implemented using a C compiler |
\ libcc.fs foreign function interface implemented using a C compiler |
| |
|
| \ Copyright (C) 2006 Free Software Foundation, Inc. |
\ Copyright (C) 2006,2007 Free Software Foundation, Inc. |
| |
|
| \ This file is part of Gforth. |
\ This file is part of Gforth. |
| |
|
| \ Gforth is free software; you can redistribute it and/or |
\ Gforth is free software; you can redistribute it and/or |
| \ modify it under the terms of the GNU General Public License |
\ modify it under the terms of the GNU General Public License |
| \ as published by the Free Software Foundation; either version 2 |
\ as published by the Free Software Foundation, either version 3 |
| \ of the License, or (at your option) any later version. |
\ of the License, or (at your option) any later version. |
| |
|
| \ This program is distributed in the hope that it will be useful, |
\ This program is distributed in the hope that it will be useful, |
| \ GNU General Public License for more details. |
\ GNU General Public License for more details. |
| |
|
| \ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
| \ along with this program; if not, write to the Free Software |
\ along with this program. If not, see http://www.gnu.org/licenses/. |
| \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
|
| |
|
| |
|
| \ What this implementation does is this: if it sees a declaration like |
\ What this implementation does is this: if it sees a declaration like |
| \ c-variable forth-name c-name |
\ c-variable forth-name c-name |
| \ c-constant forth-name c-name |
\ c-constant forth-name c-name |
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|
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\ Todo: conversion between function pointers and xts (both directions) |
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|
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\ taking an xt and turning it into a function pointer: |
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|
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\ e.g., assume we have the xt of + and want to create a C function int |
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\ gforth_callback_plus(int, int), and then pass the pointer to that |
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\ function: |
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|
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\ There should be Forth code like this: |
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\ ] + 0 (bye) |
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\ Assume that the start of this code is START |
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|
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\ Now, there should be a C function: |
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|
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\ int gforth_callback_plus(int p1, int p2) |
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\ { |
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\ Cell *sp = gforth_SP; |
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\ Float *fp = gforth_FP; |
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\ Float *fp = gforth_FP; |
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\ Address lp = gforth_LP; |
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\ sp -= 2; |
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\ sp[0] = p1; |
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\ sp[1] = p2; |
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\ gforth_engine(START, sp, rp, fp, lp); |
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\ sp += 1; |
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\ gforth_RP = rp; |
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\ gforth_SP = sp; |
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\ gforth_FP = fp; |
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\ gforth_LP = lp; |
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\ return sp[0]; |
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\ } |
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|
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\ and the pointer to that function is the C function pointer for the XT of +. |
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|
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\ Future problems: |
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\ how to combine the Forth code generation with inlining |
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\ START is not a constant across executions (when caching the C files) |
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\ Solution: make START a variable, and store into it on startup with dlsym |
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|
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\ Syntax: |
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\ callback <rettype> <params> <paramtypes> -- <rettype> |
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|
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|
| \ 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. |
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|
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[ifundef] parse-name |
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' parse-word alias parse-name |
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[then] |
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[ifundef] defer! |
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: defer! ( xt xt-deferred -- ) \ gforth defer-store |
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\G Changes the @code{defer}red word @var{xt-deferred} to execute @var{xt}. |
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>body [ has? rom [IF] ] @ [ [THEN] ] ! ; |
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[then] |
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|
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\ : delete-file 2drop 0 ; |
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|
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require struct.fs |
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|
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\ counted-string |
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|
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\ c-function-ft word body: |
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struct |
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cell% field cff-cfr \ xt of c-function-rt word |
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cell% field cff-deferred \ xt of c-function deferred word |
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cell% field cff-lha \ address of the lib-handle for the lib that |
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\ contains the wrapper function of the word |
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char% field cff-rtype \ return type |
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char% field cff-np \ number of parameters |
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1 0 field cff-ptypes \ #npar parameter types |
| \ counted string: c-name |
\ counted string: c-name |
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end-struct cff% |
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|
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variable c-source-file-id \ contains the source file id of the current batch |
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0 c-source-file-id ! |
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variable lib-handle-addr \ points to the library handle of the current batch. |
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\ the library handle is 0 if the current |
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\ batch is not yet compiled. |
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here 0 , lib-handle-addr ! \ just make sure LIB-HANDLE always works |
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2variable lib-filename \ filename without extension |
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2variable lib-modulename \ basename of the file without extension |
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2variable libcc-named-dir-v \ directory for named libcc wrapper libraries |
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0 value libcc-path \ pointer to path of library directories |
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|
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: delete-file 2drop 0 ; |
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|
| : .nb ( n -- ) |
: .nb ( n -- ) |
| 0 .r ; |
0 .r ; |
| : 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 } |
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\ insert string c-addr2 u2 in buffer c-addr1 u1; c-addr3 u3 is the |
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\ remainder of the buffer. |
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assert( u1 u2 u>= ) |
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c-addr2 c-addr1 u2 move |
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c-addr1 u1 u2 /string ; |
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|
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: front-char { c-addr1 u1 c -- c-addr3 u2 } |
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\ insert c in buffer c-addr1 u1; c-addr3 u3 is the remainder of |
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\ the buffer. |
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assert( u1 0 u> ) |
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c c-addr1 c! |
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c-addr1 u1 1 /string ; |
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|
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: s+ { addr1 u1 addr2 u2 -- addr u } |
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u1 u2 + allocate throw { addr } |
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addr1 addr u1 move |
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addr2 addr u1 + u2 move |
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addr u1 u2 + |
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; |
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|
| hex |
: append { addr1 u1 addr2 u2 -- addr u } |
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addr1 u1 u2 + dup { u } resize throw { addr } |
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addr2 addr u1 + u2 move |
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addr u ; |
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|
| require struct.fs |
\ linked list stuff (should go elsewhere) |
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|
| struct |
struct |
| cell% field list-next |
cell% field list-next |
| node list-next @ |
node list-next @ |
| repeat ; |
repeat ; |
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|
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\ linked libraries |
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|
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list% |
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cell% 2* field c-lib-string |
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end-struct c-lib% |
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|
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variable c-libs \ linked list of library names (without "lib") |
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|
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: add-lib ( c-addr u -- ) |
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\G Add library lib@i{string} to the list of libraries, where |
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\G @i{string} is represented by @i{c-addr u}. |
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c-lib% %size allocate throw dup >r |
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c-lib-string 2! |
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r> c-libs list-insert ; |
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|
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: append-l ( c-addr1 u1 node -- c-addr2 u2 ) |
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\ append " -l<nodelib>" to string1 |
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>r s" -l" append r> c-lib-string 2@ append ; |
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|
| \ C prefix lines |
\ C prefix lines |
| |
|
| \ linked list of longcstrings: [ link | count-cell | characters ] |
\ linked list of longcstrings: [ link | count-cell | characters ] |
| 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 ! |
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|
| : save-c-prefix-line ( c-addr u -- ) |
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| align here 0 , c-prefix-lines-end list-append ( c-addr u ) |
|
| longstring, ; |
|
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| : \c ( "rest-of-line" -- ) |
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| -1 parse save-c-prefix-line ; |
|
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| : 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 ; |
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|
| \c #include "engine/libcc.h" |
: save-c-prefix-line ( c-addr u -- ) |
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c-source-file-id @ ?dup-if |
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>r 2dup r> write-line throw |
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then |
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align here 0 , c-prefix-lines-end list-append ( c-addr u ) |
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longstring, ; |
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|
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: \c ( "rest-of-line" -- ) \ gforth backslash-c |
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\G One line of C declarations for the C interface |
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-1 parse save-c-prefix-line ; |
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| print-c-prefix-lines |
s" #include <gforth/" version-string s+ s" /libcc.h>" append ( c-addr u ) |
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2dup save-c-prefix-line drop free throw |
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|
| \ Types (for parsing) |
\ Types (for parsing) |
| |
|
| ." ," gen-par-n ." ," gen-par-n ." )" ; |
." ," gen-par-n ." ," gen-par-n ." )" ; |
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|
| : 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 ) |
| 2dup gen-par-r 2>r ." =" gen-wrapped-void 2r> ; |
2dup gen-par-r 2>r ." =" gen-wrapped-call 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-a ; |
gen-wrapped-a ; |
| : 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 } |
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prefix nip c-name nip + pars nip + 3 + { u } |
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u allocate throw { c-addr } |
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c-addr u |
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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= ) |
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2drop c-addr u ; |
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|
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: gen-wrapper-function ( addr -- ) |
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\ addr points to the return type index of a c-function descriptor |
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dup { descriptor } |
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count { ret } count 2dup { d: pars } chars + count { d: c-name } |
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." void " lib-modulename 2@ type ." _LTX_" descriptor wrapper-function-name 2dup type drop free throw |
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.\" (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 |
| endif |
endif |
| .\" }\n" ; |
.\" }\n" ; |
| |
|
| : compile-wrapper-function ( -- ) |
: scan-back { c-addr u1 c -- c-addr u2 } |
| s" gcc -fPIC -shared -Wl,-soname,xxx.so.1 -Wl,-export_dynamic -o xxx.so.1 -O xxx.c" system |
\ the last occurence of c in c-addr u1 is at u2-1; if it does not |
| $? abort" compiler generated error" ; |
\ occur, u2=0. |
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c-addr 1- c-addr u1 + 1- u-do |
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i c@ c = if |
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c-addr i over - 1+ unloop exit endif |
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1 -loop |
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c-addr 0 ; |
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|
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: dirname ( c-addr1 u1 -- c-addr2 u2 ) |
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\ directory name of the file name c-addr1 u1, including the final "/". |
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'/ scan-back ; |
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|
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: basename ( c-addr1 u1 -- c-addr2 u2 ) |
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\ file name without directory component |
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2dup dirname nip /string ; |
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|
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: gen-filename ( x -- c-addr u ) |
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\ generates a file basename for lib-handle-addr X |
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0 <<# ['] #s $10 base-execute #> |
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s" gforth_c_" 2swap s+ #>> ; |
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|
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: libcc-named-dir ( -- c-addr u ) |
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libcc-named-dir-v 2@ ; |
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|
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: libcc-tmp-dir ( -- c-addr u ) |
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s" ~/.gforth/libcc-tmp/" ; |
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|
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: prepend-dirname ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 ) |
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2over s+ 2swap drop free throw ; |
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|
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: open-wrappers ( -- addr|0 ) |
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lib-filename 2@ s" .la" s+ |
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2dup libcc-named-dir string-prefix? if ( c-addr u ) |
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\ see if we can open it in the path |
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libcc-named-dir nip /string |
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libcc-path open-path-file if |
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0 exit endif |
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( wfile-id c-addr2 u2 ) rot close-file throw save-mem ( c-addr2 u2 ) |
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endif |
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\ 2dup cr type |
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2dup open-lib >r |
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drop free throw r> ; |
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|
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: c-library-name-setup ( c-addr u -- ) |
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assert( c-source-file-id @ 0= ) |
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{ d: filename } |
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here 0 , lib-handle-addr ! filename lib-filename 2! |
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filename basename lib-modulename 2! ; |
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|
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: c-library-name-create ( -- ) |
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lib-filename 2@ s" .c" s+ 2dup w/o create-file throw |
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dup c-source-file-id ! |
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['] print-c-prefix-lines swap outfile-execute |
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drop free throw ; |
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|
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: c-named-library-name ( c-addr u -- ) |
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\ set up filenames for a (possibly new) library; c-addr u is the |
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\ basename of the library |
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libcc-named-dir prepend-dirname c-library-name-setup |
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open-wrappers dup if |
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lib-handle-addr @ ! |
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else |
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drop c-library-name-create |
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endif ; |
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|
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: c-tmp-library-name ( c-addr u -- ) |
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\ set up filenames for a new library; c-addr u is the basename of |
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\ the library |
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libcc-tmp-dir prepend-dirname c-library-name-setup c-library-name-create ; |
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|
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: lib-handle ( -- addr ) |
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lib-handle-addr @ @ ; |
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|
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: init-c-source-file ( -- ) |
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lib-handle 0= if |
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c-source-file-id @ 0= if |
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here gen-filename c-tmp-library-name |
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endif |
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endif ; |
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|
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: c-source-file ( -- file-id ) |
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c-source-file-id @ assert( dup ) ; |
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|
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: notype-execute ( ... xt -- ... ) |
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what's type { oldtype } try |
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['] 2drop is type execute 0 |
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restore |
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oldtype is type |
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endtry |
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throw ; |
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|
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: c-source-file-execute ( ... xt -- ... ) |
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\ direct the output of xt to c-source-file, or nothing |
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lib-handle if |
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notype-execute |
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else |
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c-source-file outfile-execute |
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endif ; |
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|
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: .lib-error ( -- ) |
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[ifdef] lib-error |
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['] cr stderr outfile-execute |
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lib-error ['] type stderr outfile-execute |
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[then] ; |
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|
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DEFER compile-wrapper-function ( -- ) |
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: compile-wrapper-function1 ( -- ) |
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lib-handle 0= if |
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c-source-file close-file throw |
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0 c-source-file-id ! |
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[ libtool-command s" --silent --mode=compile --tag=CC " s+ |
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libtool-cc append s" -I " append |
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s" includedir" getenv append ] sliteral |
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s" -O -c " s+ lib-filename 2@ append s" .c -o " append |
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lib-filename 2@ append s" .lo" append ( c-addr u ) |
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\ cr 2dup type |
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2dup system drop free throw $? abort" libtool compile failed" |
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[ libtool-command s" --silent --mode=link --tag=CC " s+ |
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libtool-cc append s" -module -rpath " s+ ] sliteral |
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lib-filename 2@ dirname s+ s" " append |
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lib-filename 2@ append s" .lo -o " append |
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lib-filename 2@ append s" .la" append ( c-addr u ) |
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c-libs @ ['] append-l list-map |
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\ 2dup type cr |
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2dup system drop free throw $? abort" libtool link failed" |
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open-wrappers dup 0= if |
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.lib-error true abort" open-lib failed" |
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endif |
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( lib-handle ) lib-handle-addr @ ! |
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endif |
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lib-filename 2@ drop free throw 0 0 lib-filename 2! ; |
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' compile-wrapper-function1 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 |
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.lib-error -&32 throw |
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endif |
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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-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 ! |
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xt-cfr xt-defer defer! |
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xt-cfr execute ; |
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|
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: c-function-rt ( -- ) |
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\ run-time definition for c function; addr is the address where |
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\ the sym should be stored |
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noname create 0 , |
| does> ( ... -- ... ) |
does> ( ... -- ... ) |
| @ call-c ; |
@ call-c ; |
| |
|
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: c-function ( "forth-name" "c-name" "@{type@}" "--" "type" -- ) \ gforth |
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\G Define a Forth word @i{forth-name}. @i{Forth-name} has the |
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\G specified stack effect and calls the C function @code{c-name}. |
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defer lastxt dup c-function-rt lastxt c-function-ft |
| |
lastxt swap defer! ; |
| |
|
| |
: clear-libs ( -- ) |
| |
\G Clear the list of libs |
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c-source-file-id @ if |
| |
compile-wrapper-function |
| |
endif |
| |
0 c-libs ! ; |
| |
clear-libs |
| |
|
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: c-library-incomplete ( -- ) |
| |
true abort" Called function of unfinished named C library" ; |
| |
|
| |
: c-library-name ( c-addr u -- ) \ gforth |
| |
\G Start a C library interface with name @i{c-addr u}. |
| |
clear-libs |
| |
['] c-library-incomplete is compile-wrapper-function |
| |
c-named-library-name ; |
| |
|
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: c-library ( "name" -- ) \ gforth |
| |
\G Parsing version of @code{c-library-name} |
| |
parse-name save-mem c-library-name ; |
| |
|
| |
: end-c-library ( -- ) \ gforth |
| |
\G Finish and (if necessary) build the latest C library interface. |
| |
['] compile-wrapper-function1 is compile-wrapper-function |
| |
compile-wrapper-function1 ; |
| |
|
| |
: init-libcc ( -- ) |
| |
s" ~/.gforth/libcc-named/" libcc-named-dir-v 2! |
| |
[IFDEF] make-path |
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make-path to libcc-path |
| |
libcc-named-dir libcc-path also-path |
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[ s" libccdir" getenv ] sliteral libcc-path also-path |
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[THEN] |
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; |
| |
|
| |
init-libcc |
| |
|
| s" Library not found" exception constant err-nolib |
:noname ( -- ) |
| |
defers 'cold |
| : library ( "name" "file" -- ) \ gforth |
init-libcc ; |
| \G Dynamically links the library specified by @i{file}. Defines a |
is 'cold |
| \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 |
|
