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1edae076 MV |
1 | /* dynl-vms.c - dynamic linking for VMS, not yet ported |
2 | * | |
3 | * Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2, or (at your option) | |
8 | * any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
17 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
18 | * Boston, MA 02111-1307 USA | |
1edae076 MV |
19 | * |
20 | * As a special exception, the Free Software Foundation gives permission | |
21 | * for additional uses of the text contained in its release of GUILE. | |
22 | * | |
23 | * The exception is that, if you link the GUILE library with other files | |
24 | * to produce an executable, this does not by itself cause the | |
25 | * resulting executable to be covered by the GNU General Public License. | |
26 | * Your use of that executable is in no way restricted on account of | |
27 | * linking the GUILE library code into it. | |
28 | * | |
29 | * This exception does not however invalidate any other reasons why | |
30 | * the executable file might be covered by the GNU General Public License. | |
31 | * | |
32 | * This exception applies only to the code released by the | |
33 | * Free Software Foundation under the name GUILE. If you copy | |
34 | * code from other Free Software Foundation releases into a copy of | |
35 | * GUILE, as the General Public License permits, the exception does | |
36 | * not apply to the code that you add in this way. To avoid misleading | |
37 | * anyone as to the status of such modified files, you must delete | |
38 | * this exception notice from them. | |
39 | * | |
40 | * If you write modifications of your own for GUILE, it is your choice | |
41 | * whether to permit this exception to apply to your modifications. | |
82892bed | 42 | * If you do not wish that, delete this exception notice. */ |
1edae076 MV |
43 | |
44 | /* "dynl.c" dynamically link&load object files. | |
45 | Author: Aubrey Jaffer | |
46 | (Not yet) modified for libguile by Marius Vollmer */ | |
47 | ||
6e8d25a6 GB |
48 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, |
49 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
50 | ||
1edae076 MV |
51 | /* We should try to implement dynamic-link/dynamic-call for VMS, |
52 | too. */ | |
53 | ||
54 | #include "_scm.h" | |
55 | ||
56 | /* This permits dynamic linking. For example, the procedure of 0 arguments | |
57 | from a file could be the initialization procedure. | |
58 | (vms:dynamic-link-call "MYDISK:[MYDIR].EXE" "foo" "INIT_FOO") | |
59 | The first argument specifies the directory where the file specified | |
60 | by the second argument resides. The current directory would be | |
61 | "SYS$DISK:[].EXE". | |
62 | The second argument cannot contain any punctuation. | |
63 | The third argument probably needs to be uppercased to mimic the VMS linker. | |
64 | */ | |
65 | ||
66 | # include <descrip.h> | |
67 | # include <ssdef.h> | |
68 | # include <rmsdef.h> | |
69 | ||
70 | struct dsc$descriptor *descriptorize(x, buff) | |
71 | struct dsc$descriptor *x; | |
72 | SCM buff; | |
73 | {(*x).dsc$w_length = LENGTH(buff); | |
74 | (*x).dsc$a_pointer = CHARS(buff); | |
75 | (*x).dsc$b_class = DSC$K_CLASS_S; | |
76 | (*x).dsc$b_dtype = DSC$K_DTYPE_T; | |
77 | return(x);} | |
78 | ||
79 | static char s_dynl[] = "vms:dynamic-link-call"; | |
6e8d25a6 | 80 | SCM dynl(SCM dir, SCM symbol, SCM fname) |
1edae076 MV |
81 | { |
82 | struct dsc$descriptor fnamed, symbold, dird; | |
83 | void (*fcn)(); | |
84 | long retval; | |
85 | ASSERT(IMP(dir) || STRINGP(dir), dir, ARG1, s_dynl); | |
86 | ASSERT(NIMP(fname) && STRINGP(fname), fname, ARG2, s_dynl); | |
87 | ASSERT(NIMP(symbol) && STRINGP(symbol), symbol, ARG3, s_dynl); | |
88 | descriptorize(&fnamed, fname); | |
89 | descriptorize(&symbold, symbol); | |
90 | DEFER_INTS; | |
91 | retval = lib$find_image_symbol(&fnamed, &symbold, &fcn, | |
92 | IMP(dir) ? 0 : descriptorize(&dird, dir)); | |
93 | if (SS$_NORMAL != retval) { | |
94 | /* wta(MAKINUM(retval), "vms error", s_dynl); */ | |
95 | ALLOW_INTS; | |
96 | return BOOL_F; | |
97 | } | |
98 | ALLOW_INTS; | |
99 | /* *loc_loadpath = dir; */ | |
100 | (*fcn)(); | |
101 | /* *loc_loadpath = oloadpath; */ | |
102 | return BOOL_T; | |
103 | } | |
104 | ||
105 | void init_dynl() | |
106 | { | |
107 | make_subr(s_dynl, tc7_subr_3, dynl); | |
108 | } |