version 1.18, 2007/06/01 18:40:20
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version 1.20, 2007/06/09 15:55:44
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Line 73
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Line 73
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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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Line 191 variable c-prefix-lines-end c-prefix-lin
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Line 233 variable c-prefix-lines-end c-prefix-lin
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\G One line of C declarations for the C interface |
\G One line of C declarations for the C interface |
-1 parse save-c-prefix-line ; |
-1 parse save-c-prefix-line ; |
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\c #include "engine/libcc.h" |
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) |
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Line 390 create gen-wrapped-types
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Line 433 create gen-wrapped-types
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: compile-wrapper-function ( -- ) |
: compile-wrapper-function ( -- ) |
c-source-file close-file throw |
c-source-file close-file throw |
0 c-source-file-id ! |
0 c-source-file-id ! |
s" gcc -I. -fPIC -shared -Wl,-soname," lib-filename 2@ s+ |
s" gcc -fPIC -shared -Wl,-soname," lib-filename 2@ s+ |
s" .so.1 -Wl,-export_dynamic -o " append lib-filename 2@ append |
s" .so.1 -Wl,-export_dynamic -o " append lib-filename 2@ append |
s" .so.1 -O " append lib-filename 2@ append s" .c" append ( c-addr u ) |
[ 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 ) |
2dup system drop free throw |
2dup system drop free throw |
$? abort" compiler generated error" \ !! call dlerror |
$? abort" compiler generated error" \ !! call dlerror |
lib-filename 2@ s" .so.1" s+ |
lib-filename 2@ s" .so.1" s+ |