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172 lines
5 KiB
C
172 lines
5 KiB
C
/* dynl-shl.c - dynamic linking with shl_load (HP-UX)
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*
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* Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*/
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/* "dynl.c" dynamically link&load object files.
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Author: Aubrey Jaffer
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Modified for libguile by Marius Vollmer */
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#include "_scm.h"
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#include "genio.h"
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#include "smob.h"
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#include "dl.h"
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#define SHL(obj) ((shl_t*)SCM_CDR(obj))
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static int printshl SCM_P ((SCM exp, SCM port, scm_printstate *pstate));
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static int
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prinshl (exp, port, pstate)
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SCM exp;
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SCM port;
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scm_printstate *pstate;
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{
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scm_gen_puts (scm_regular_string, "#<dynamic-linked ", port);
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scm_intprint (SCM_CDR (exp), 16, port);
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scm_gen_putc ('>', port);
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return 1;
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}
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int scm_tc16_shl;
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static scm_smobfuns shlsmob = { scm_mark0, scm_free0, prinshl };
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SCM_PROC (s_dynamic_link, "dynamic-link", 1, 0, 0, scm_dynamic_link);
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SCM
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scm_dynamic_link (fname)
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SCM fname;
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{
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SCM z;
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shl_t shl;
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fname = scm_coerce_rostring (fname, s_dynamic_link, SCM_ARG1);
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SCM_DEFER_INTS;
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shl = shl_load (SCM_CHARS (fname), BIND_DEFERRED , 0L);
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if (NULL==shl)
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scm_misc_error (s_dynamic_link, "dynamic linking failed", SCM_EOL);
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SCM_NEWCELL (z);
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SCM_SETCHARS (z, shl);
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SCM_SETCAR (z, scm_tc16_shl);
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SCM_ALLOW_INTS;
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return z;
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}
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SCM_PROC (s_dynamic_call, "dynamic-call", 2, 0, 0, scm_dynamic_call);
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SCM
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scm_dynamic_call (symb, shl)
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SCM symb, shl;
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{
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void (*func)() = 0;
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int i;
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symb = scm_coerce_rostring (symb, s_dynamic_call, SCM_ARG1);
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SCM_ASSERT (SCM_NIMP (shl) && SCM_CAR (shl) == scm_tc16_shl, shl, SCM_ARG2,
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s_dynamic_call);
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SCM_DEFER_INTS;
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if (shl_findsym (&SHL(shl), SCM_CHARS(symb), TYPE_PROCEDURE, &func))
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scm_misc_error (s_dynamic_call, "undefined function",
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scm_cons (symb, SCM_EOL));
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SCM_ALLOW_INTS;
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(*func) ();
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return SCM_BOOL_T;
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}
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SCM_PROC (s_dynamic_args_call, "dynamic-args-call", 3, 0, 0, scm_dynamic_args_call);
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SCM
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scm_dynamic_args_call (symb, shl, args)
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SCM symb, shl, args;
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{
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int i, argc;
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char **argv;
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int (*func) SCM_P ((int argc, char **argv)) = 0;
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symb = scm_coerce_rostring (symb, s_dynamic_args_call, SCM_ARG1);
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SCM_ASSERT (SCM_NIMP (shl) && SCM_CAR(shl) == scm_tc16_shl, shl, SCM_ARG2,
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s_dynamic_args_call);
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SCM_DEFER_INTS;
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if (shl_findsym(&SHL(shl), SCM_CHARS(symb), TYPE_PROCEDURE, &func))
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scm_misc_error (s_dynamic_call, "undefined function: %s",
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scm_cons (symb, SCM_EOL));
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argv = scm_make_argv_from_stringlist (args, &argc, s_dynamic_args_call,
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SCM_ARG3);
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SCM_ALLOW_INTS;
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i = (*func) (argc, argv);
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SCM_DEFER_INTS;
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scm_must_free_argv (argv);
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SCM_ALLOW_INTS;
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return SCM_MAKINUM (0L+i);
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}
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SCM_PROC (s_dynamic_unlink, "dynamic-unlink", 1, 0, 0, scm_dynamic_unlink);
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SCM
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scm_dynamic_unlink (shl)
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SCM shl;
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{
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int status;
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SCM_ASSERT (SCM_NIMP (shl) && SCM_CAR (shl) == scm_tc16_shl, shl,
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SCM_ARG1, s_dynamic_unlink);
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SCM_DEFER_INTS;
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status = shl_unload (SHL (shl));
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SCM_ALLOW_INTS;
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if (!status)
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return SCM_BOOL_T;
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return SCM_BOOL_F;
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}
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void
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scm_init_dynamic_linking ()
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{
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scm_tc16_shl = scm_newsmob (&shlsmob);
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#include "dynl.x"
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}
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