Annotation of gforth/fflib.fs, revision 1.2

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 !
        !           145:     swap postpone Literal compile, postpone EXIT
        !           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: 
1.2     ! pazsan    201: callback wincall (int) int int int int callback;
        !           202: 
        !           203: :noname ( a b c d -- e )  2drop 2drop 0 ; wincall do_timer
        !           204:     
1.1       pazsan    205: [then]    

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