Annotation of gforth/fflib.fs, revision 1.3
1.2 pazsan 1: \ lib.fs shared library support package 16aug03py
1.1 pazsan 2:
1.2 pazsan 3: \ Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc.
1.1 pazsan 4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20:
21: Variable libs 0 libs !
22: Variable thisproc
23: Variable thislib
24: \G links between libraries
1.2 pazsan 25: Variable revdec revdec off
26: \ turn revdec on to compile bigFORTH libraries
27:
28: Vocabulary c-decl
29: Vocabulary cb-decl
1.1 pazsan 30:
31: : @lib ( lib -- )
32: \G obtains library handle
33: cell+ dup 2 cells + count open-lib
34: dup 0= abort" Library not found" swap ! ;
35:
36: : @proc ( lib addr -- )
37: \G obtains symbol address
38: cell+ tuck cell+ @ count rot cell+ @
39: lib-sym dup 0= abort" Proc not found!" swap ! ;
40:
41: : proc, ( lib -- )
42: \G allocates and initializes proc stub
43: \G stub format:
44: \G linked list in library
45: \G address of proc
46: \G ptr to OS name of symbol as counted string
47: \G threaded code for invocation
48: here dup thisproc !
49: swap 2 cells + dup @ A, !
50: 0 , 0 A, ;
51:
52: : proc: ( lib "name" -- )
53: \G Creates a named proc stub
1.2 pazsan 54: Create proc, 0 also c-decl
1.1 pazsan 55: DOES> ( x1 .. xn -- r )
56: dup cell+ @ swap 3 cells + >r ;
57:
58: : library ( "name" "file" -- )
59: \G loads library "file" and creates a proc defining word "name"
60: \G library format:
61: \G linked list of libraries
62: \G library handle
63: \G linked list of library's procs
64: \G OS name of library as counted string
65: Create here libs @ A, dup libs !
66: 0 , 0 A, bl sword string, @lib
67: DOES> ( -- ) dup thislib ! proc: ;
68:
69: : init-shared-libs ( -- )
70: defers 'cold libs
71: 0 libs BEGIN @ dup WHILE dup REPEAT drop
72: BEGIN dup WHILE >r
73: r@ @lib
74: r@ 2 cells + BEGIN @ dup WHILE r@ over @proc REPEAT
75: drop rdrop
76: REPEAT drop ;
77:
78: ' init-shared-libs IS 'cold
79:
80: : rettype ( endxt startxt "name" -- )
81: create immediate 2,
82: DOES>
83: 2@ compile, >r
1.2 pazsan 84: revdec @ IF 0 >r
85: BEGIN dup WHILE >r REPEAT drop
1.1 pazsan 86: BEGIN r> dup WHILE compile, REPEAT drop
87: ELSE
1.2 pazsan 88: BEGIN dup WHILE compile, REPEAT drop
1.1 pazsan 89: THEN
90: r> compile, postpone EXIT
91: here thisproc @ 2 cells + ! bl sword s,
1.2 pazsan 92: thislib @ thisproc @ @proc previous ;
93:
94: also c-decl definitions
95:
96: ' av-int AConstant int
97: ' av-float AConstant sf
98: ' av-double AConstant df
99: ' av-longlong AConstant llong
100: ' av-ptr AConstant ptr
1.1 pazsan 101:
102: ' av-call-void ' av-start-void rettype (void)
103: ' av-call-int ' av-start-int rettype (int)
104: ' av-call-float ' av-start-float rettype (sf)
105: ' av-call-double ' av-start-double rettype (fp)
106: ' av-call-longlong ' av-start-longlong rettype (llong)
107: ' av-call-ptr ' av-start-ptr rettype (ptr)
108:
1.2 pazsan 109: previous definitions
1.1 pazsan 110:
1.2 pazsan 111: \ legacy interface for old library interface
1.1 pazsan 112:
1.2 pazsan 113: also c-decl
1.1 pazsan 114:
1.2 pazsan 115: : (int...) ( n -- )
116: >r ' execute r> 0 ?DO int LOOP
117: 0 postpone Literal postpone ?DO postpone int postpone LOOP
118: postpone (int) ;
119: : (void...) ( n -- )
120: >r ' execute r> 0 ?DO int LOOP
121: 0 postpone Literal postpone ?DO postpone int postpone LOOP
122: postpone (void) ;
123: : (float...) ( n -- )
124: >r ' execute r> 0 ?DO df LOOP
125: 0 postpone Literal postpone ?DO postpone df postpone LOOP
126: postpone (fp) ;
1.1 pazsan 127: : (int) ( n -- )
1.2 pazsan 128: >r ' execute r> 0 ?DO int LOOP postpone (int) ;
1.1 pazsan 129: : (void) ( n -- )
1.2 pazsan 130: >r ' execute r> 0 ?DO int LOOP postpone (void) ;
1.1 pazsan 131: : (float) ( n -- )
1.2 pazsan 132: >r ' execute r> 0 ?DO df LOOP postpone (fp) ;
133:
134: previous
135:
136: \ callback stuff
137:
138: Variable callbacks
139: \G link between callbacks
140:
141: : callback ( -- )
142: Create 0 ] postpone >r also cb-decl
143: DOES>
144: Create here >r 0 , callbacks @ A, r@ callbacks !
1.3 ! pazsan 145: swap postpone Literal postpone call , postpone EXIT
1.2 pazsan 146: r> dup cell+ cell+ alloc-callback swap !
147: DOES> @ ;
148:
149: : callback; ( 0 xt1 .. xtn -- )
150: BEGIN over WHILE compile, REPEAT
151: postpone r> postpone execute compile, drop
152: postpone EXIT postpone [ previous ; immediate
153:
154: : va-ret ( xt xt -- )
155: Create A, A, immediate
156: DOES> 2@ compile, ;
157:
158: : init-callbacks ( -- )
159: defers 'cold callbacks 1 cells -
160: BEGIN cell+ @ dup WHILE dup cell+ cell+ alloc-callback over !
161: REPEAT drop ;
162:
163: ' init-callbacks IS 'cold
164:
165: also cb-decl definitions
166:
167: \ arguments
1.1 pazsan 168:
1.2 pazsan 169: ' va-arg-int Alias int
170: ' va-arg-float Alias sf
171: ' va-arg-double Alias df
172: ' va-arg-longlong Alias llong
173: ' va-arg-ptr Alias ptr
174:
175: ' va-return-void ' va-start-void va-ret (void)
176: ' va-return-int ' va-start-int va-ret (int)
177: ' va-return-float ' va-start-float va-ret (sf)
178: ' va-return-double ' va-start-double va-ret (fp)
179: ' va-return-longlong ' va-start-longlong va-ret (llong)
180: ' va-return-ptr ' va-start-ptr va-ret (ptr)
181:
182: previous definitions
183:
184: \ testing stuff
1.1 pazsan 185:
186: [ifdef] testing
187:
188: library libc /lib/libc.so.6
189:
190: libc sleep int (int) sleep
191: libc open int int ptr (int) open
192: libc lseek int llong int (llong) lseek
193: libc read int ptr int (int) read
194: libc close int (int) close
195:
196: library libm /lib/libm.so.6
197:
198: libm fmodf sf sf (sf) fmodf
199: libm fmod df df (fp) fmod
200:
1.3 ! pazsan 201: \ example for a windows callback
! 202:
1.2 pazsan 203: callback wincall (int) int int int int callback;
204:
205: :noname ( a b c d -- e ) 2drop 2drop 0 ; wincall do_timer
1.3 ! pazsan 206:
! 207: \ test a callback
! 208:
! 209: callback 2:1 (int) int int callback;
! 210:
! 211: : cb-test ( a b -- c )
! 212: cr ." Testing callback"
! 213: cr ." arguments: " .s
! 214: cr ." result " + .s cr ;
! 215: ' cb-test 2:1 c_plus
! 216:
! 217: : test c_plus av-start-int av-int av-int av-call-int ;
! 218:
! 219: \ 3 4 test
! 220:
1.1 pazsan 221: [then]
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