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authorMarius Vollmer <mvo@zagadka.de>1996-12-08 16:52:38 +0000
committerMarius Vollmer <mvo@zagadka.de>1996-12-08 16:52:38 +0000
commit1edae07624597d3a545e95d2090b2137f0304e81 (patch)
treee7f8c1f5b75af9224e0bec401213c7c9393d87f6 /libguile/dynl-vms.c
parent708ac61f7788574a14ff5de253ab0087f8531d81 (diff)
downloadguile-1edae07624597d3a545e95d2090b2137f0304e81.tar.gz
Initial revision
Diffstat (limited to 'libguile/dynl-vms.c')
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diff --git a/libguile/dynl-vms.c b/libguile/dynl-vms.c
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+/* dynl-vms.c - dynamic linking for VMS, not yet ported
+ *
+ * Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ */
+
+/* "dynl.c" dynamically link&load object files.
+ Author: Aubrey Jaffer
+ (Not yet) modified for libguile by Marius Vollmer */
+
+/* We should try to implement dynamic-link/dynamic-call for VMS,
+ too. */
+
+#include "_scm.h"
+
+/* This permits dynamic linking. For example, the procedure of 0 arguments
+ from a file could be the initialization procedure.
+ (vms:dynamic-link-call "MYDISK:[MYDIR].EXE" "foo" "INIT_FOO")
+ The first argument specifies the directory where the file specified
+ by the second argument resides. The current directory would be
+ "SYS$DISK:[].EXE".
+ The second argument cannot contain any punctuation.
+ The third argument probably needs to be uppercased to mimic the VMS linker.
+ */
+
+# include <descrip.h>
+# include <ssdef.h>
+# include <rmsdef.h>
+
+struct dsc$descriptor *descriptorize(x, buff)
+ struct dsc$descriptor *x;
+ SCM buff;
+{(*x).dsc$w_length = LENGTH(buff);
+ (*x).dsc$a_pointer = CHARS(buff);
+ (*x).dsc$b_class = DSC$K_CLASS_S;
+ (*x).dsc$b_dtype = DSC$K_DTYPE_T;
+ return(x);}
+
+static char s_dynl[] = "vms:dynamic-link-call";
+SCM dynl(dir, symbol, fname)
+ SCM dir, symbol, fname;
+{
+ struct dsc$descriptor fnamed, symbold, dird;
+ void (*fcn)();
+ long retval;
+ ASSERT(IMP(dir) || STRINGP(dir), dir, ARG1, s_dynl);
+ ASSERT(NIMP(fname) && STRINGP(fname), fname, ARG2, s_dynl);
+ ASSERT(NIMP(symbol) && STRINGP(symbol), symbol, ARG3, s_dynl);
+ descriptorize(&fnamed, fname);
+ descriptorize(&symbold, symbol);
+ DEFER_INTS;
+ retval = lib$find_image_symbol(&fnamed, &symbold, &fcn,
+ IMP(dir) ? 0 : descriptorize(&dird, dir));
+ if (SS$_NORMAL != retval) {
+ /* wta(MAKINUM(retval), "vms error", s_dynl); */
+ ALLOW_INTS;
+ return BOOL_F;
+ }
+ ALLOW_INTS;
+/* *loc_loadpath = dir; */
+ (*fcn)();
+/* *loc_loadpath = oloadpath; */
+ return BOOL_T;
+}
+
+void init_dynl()
+{
+ make_subr(s_dynl, tc7_subr_3, dynl);
+}