version 1.5, 2006/12/28 20:53:04
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version 1.22, 2007/10/29 15:56:31
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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 |
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\ \ something that tells it to include <unistd.h> |
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\ \ something that tells it that the current library is libc |
\ \ something that tells it that the current library is libc |
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\ \c #include <unistd.h> |
\ c-function dlseek lseek n d n -- d |
\ c-function dlseek lseek n d n -- d |
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\ it genererates C code similar to the following: |
\ it genererates C code similar to the following: |
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Line 45
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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. |
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\ ToDo: |
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\ Batching, caching and lazy evaluation: |
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\ Batching: |
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\ New words are deferred, and the corresponding C functions are |
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\ collected in one file, until the first word is EXECUTEd; then the |
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\ file is compiled and linked into the system, and the word is |
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\ resolved. |
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\ Caching: |
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\ Instead of compiling all this stuff anew for every execution, we |
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\ keep the files around and have an index file containing the function |
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\ names and their corresponding .so files. If the needed wrapper name |
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\ is already present, it is just linked instead of generating the |
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\ wrapper again. This is all done by loading the index file(s?), |
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\ which define words for the wrappers in a separate wordlist. |
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\ The files are built in .../lib/gforth/$VERSION/libcc/ or |
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\ ~/.gforth/libcc/$HOST/. |
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\ other things to do: |
\ other things to do: |
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\ 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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\ Todo: conversion between function pointers and xts (both directions) |
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\ taking an xt and turning it into a function pointer: |
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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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\ 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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\ Now, there should be a C function: |
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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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\ and the pointer to that function is the C function pointer for the XT of +. |
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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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\ Syntax: |
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\ callback <rettype> <params> <paramtypes> -- <rettype> |
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\ data structures |
\ data structures |
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\ 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 |
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: delete-file 2drop 0 ; |
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require struct.fs |
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\ counted-string |
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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 |
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\ counted string: c-name |
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end-struct cff% |
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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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2variable lib-filename \ filename without extension |
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: .nb ( n -- ) |
: .nb ( n -- ) |
0 .r ; |
0 .r ; |
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Line 155
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: const+ ( n1 "name" -- n2 ) |
: const+ ( n1 "name" -- n2 ) |
dup constant 1+ ; |
dup constant 1+ ; |
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\ dlerror |
: 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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: 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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: 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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: 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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\ linked list stuff (should go elsewhere) |
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struct |
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cell% field list-next |
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1 0 field list-payload |
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end-struct list% |
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: list-insert { node list -- } |
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list list-next @ node list-next ! |
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node list list-next ! ; |
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: list-append { node endlistp -- } |
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\ insert node at place pointed to by endlistp |
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node endlistp @ list-insert |
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node list-next endlistp ! ; |
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: list-map ( ... list xt -- ... ) |
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\ xt ( ... node -- ... ) |
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{ xt } begin { node } |
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node while |
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node xt execute |
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node list-next @ |
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repeat ; |
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\ C prefix lines |
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\ linked list of longcstrings: [ link | count-cell | characters ] |
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list% |
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cell% field c-prefix-count |
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1 0 field c-prefix-chars |
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end-struct c-prefix% |
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variable c-prefix-lines 0 c-prefix-lines ! |
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variable c-prefix-lines-end c-prefix-lines c-prefix-lines-end ! |
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: print-c-prefix-line ( node -- ) |
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dup c-prefix-chars swap c-prefix-count @ type cr ; |
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: print-c-prefix-lines ( -- ) |
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c-prefix-lines @ ['] print-c-prefix-line list-map ; |
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: 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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: \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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\ require lib.fs |
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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\ library libc libc.so.6 |
\ Types (for parsing) |
\ libc sleep int (int) sleep |
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\ libc dlerror (ptr) dlerror |
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wordlist constant libcc-types |
wordlist constant libcc-types |
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Line 215 create gen-wrapped-types
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Line 379 create gen-wrapped-types
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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 ; |
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: 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 } |
.\" #include \"engine/libcc.h\"\n" |
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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: 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 " 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 |
Line 234 create gen-wrapped-types
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Line 410 create gen-wrapped-types
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endif |
endif |
.\" }\n" ; |
.\" }\n" ; |
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: 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" |
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then ; |
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: gen-filename ( x -- c-addr u ) |
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\ generates a filename without extension for lib-handle-addr X |
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0 <<# ['] #s $10 base-execute #> |
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tempdir s" /gforth-c-" s+ 2swap append #>> ; |
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: init-c-source-file ( -- ) |
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c-source-file-id @ 0= if |
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here 0 , dup lib-handle-addr ! gen-filename 2dup lib-filename 2! |
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s" .c" s+ 2dup w/o create-file throw 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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endif ; |
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: c-source-file ( -- file-id ) |
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c-source-file-id @ assert( dup ) ; |
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DEFER compile-wrapper-function |
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:NONAME ( -- ) |
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c-source-file close-file throw |
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0 c-source-file-id ! |
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[ s" libtool --silent --mode=link gcc -module -I " |
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s" includedir" getenv append s" -rpath " append ] sliteral |
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tempdir s+ s" -O -c " append lib-filename 2@ append s" .c -o " append |
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lib-filename 2@ append s" .la" append ( c-addr u ) |
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\ s" gcc -fPIC -shared -Wl,-soname," lib-filename 2@ s+ |
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\ s" .so.1 -Wl,-export_dynamic -o " append lib-filename 2@ append |
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\ [ s" .so.1 -O -I " s" includedir" getenv append s" " append ] sliteral |
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\ append lib-filename 2@ append s" .c" append ( c-addr u ) |
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~~ 2dup type 2dup system drop free throw |
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$? abort" compiler generated error" \ !! call dlerror |
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tempdir s" /.libs/" s+ lib-filename 2@ append s" .so.0" append |
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2dup type |
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2dup open-lib dup 0= abort" open-lib failed" \ !! call dlerror |
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( lib-handle ) lib-handle-addr @ ! |
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2dup delete-file throw drop free throw |
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lib-filename 2@ s" .c" s+ 2dup delete-file throw drop free throw |
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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" ; |
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: 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= -&32 and throw |
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wrapper-name drop free throw ; |
: c-function ( "forth-name" "c-name" "{libcc-type}" "--" "libcc-type" -- ) |
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create here >r 0 , \ place for the wrapper function pointer |
: c-function-ft ( xt-defr xt-cfr "c-name" "{libcc-type}" "--" "libcc-type" -- ) |
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\ build time/first time action for c-function |
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init-c-source-file |
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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 ! |
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xt-cfr xt-defer defer! |
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xt-cfr execute ; |
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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 |
s" Library not found" exception constant err-nolib |
lastxt swap defer! ; |
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: library ( "name" "file" -- ) \ gforth |
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\G Dynamically links the library specified by @i{file}. Defines a |
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\G word @i{name} ( -- lib ) that starts the declaration of a |
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\G function from that library. |
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create parse-name open-lib dup 0= err-nolib and throw , |
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does> ( -- lib ) |
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@ ; |
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\ test |
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\ test all parameter and return types |
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\ cr .( #include "engine/libcc.h") |
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\ cr .( #include <unistd.h>) |
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\ cr ." typedef void (* func)(int); |
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\ cr ." int test1(int,char*,long,double,void (*)(int));" |
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\ cr ." Cell *test2(void);" |
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\ cr ." int test3(void);" |
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\ cr ." float test4(void);" |
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\ cr ." func test5(void);" |
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\ cr ." void test6(void);" |
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\ cr |
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\ c-function dlseek lseek n d n -- d |
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\ c-function n test1 n a d r func -- n |
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\ c-function a test2 -- a |
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\ c-function d test3 -- d |
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\ c-function r test4 -- r |
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\ c-function func test5 -- func |
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\ c-function void test6 -- void |
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c-function strlen strlen a -- n |
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cr s\" fooo\0" 2dup dump drop .s strlen cr .s cr |
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