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/* Copyright (C) 2001 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, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 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. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include "frames.h"
scm_t_bits scm_tc16_heap_frame;
SCM
scm_c_make_heap_frame (SCM *fp)
{
SCM frame;
SCM *lower = SCM_FRAME_LOWER_ADDRESS (fp);
SCM *upper = SCM_FRAME_UPPER_ADDRESS (fp);
size_t size = sizeof (SCM) * (upper - lower + 1);
SCM *p = scm_gc_malloc (size, "frame");
SCM_NEWSMOB (frame, scm_tc16_heap_frame, p);
p[0] = frame; /* self link */
memcpy (p + 1, lower, size - sizeof (SCM));
return frame;
}
static SCM
heap_frame_mark (SCM obj)
{
SCM *sp;
SCM *fp = SCM_HEAP_FRAME_POINTER (obj);
SCM *limit = &SCM_FRAME_HEAP_LINK (fp);
for (sp = SCM_FRAME_LOWER_ADDRESS (fp); sp <= limit; sp++)
if (SCM_NIMP (*sp))
scm_gc_mark (*sp);
return SCM_BOOL_F;
}
static scm_sizet
heap_frame_free (SCM obj)
{
SCM *fp = SCM_HEAP_FRAME_POINTER (obj);
SCM *lower = SCM_FRAME_LOWER_ADDRESS (fp);
SCM *upper = SCM_FRAME_UPPER_ADDRESS (fp);
size_t size = sizeof (SCM) * (upper - lower + 1);
scm_gc_free (SCM_HEAP_FRAME_DATA (obj), size, "frame");
return 0;
}
/* Scheme interface */
SCM_DEFINE (scm_frame_p, "frame?", 1, 0, 0,
(SCM obj),
"")
#define FUNC_NAME s_scm_frame_p
{
return SCM_BOOL (SCM_HEAP_FRAME_P (obj));
}
#undef FUNC_NAME
SCM_DEFINE (scm_frame_program, "frame-program", 1, 0, 0,
(SCM frame),
"")
#define FUNC_NAME s_scm_frame_program
{
SCM_VALIDATE_HEAP_FRAME (1, frame);
return SCM_FRAME_PROGRAM (SCM_HEAP_FRAME_POINTER (frame));
}
#undef FUNC_NAME
SCM_DEFINE (scm_frame_local_ref, "frame-local-ref", 2, 0, 0,
(SCM frame, SCM index),
"")
#define FUNC_NAME s_scm_frame_local_ref
{
SCM_VALIDATE_HEAP_FRAME (1, frame);
SCM_MAKE_VALIDATE (2, index, I_INUMP); /* FIXME: Check the range! */
return SCM_FRAME_VARIABLE (SCM_HEAP_FRAME_POINTER (frame),
SCM_I_INUM (index));
}
#undef FUNC_NAME
SCM_DEFINE (scm_frame_local_set_x, "frame-local-set!", 3, 0, 0,
(SCM frame, SCM index, SCM val),
"")
#define FUNC_NAME s_scm_frame_local_set_x
{
SCM_VALIDATE_HEAP_FRAME (1, frame);
SCM_MAKE_VALIDATE (2, index, I_INUMP); /* FIXME: Check the range! */
SCM_FRAME_VARIABLE (SCM_HEAP_FRAME_POINTER (frame),
SCM_I_INUM (index)) = val;
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0,
(SCM frame),
"")
#define FUNC_NAME s_scm_frame_return_address
{
SCM_VALIDATE_HEAP_FRAME (1, frame);
return scm_from_ulong ((unsigned long)
(SCM_FRAME_RETURN_ADDRESS
(SCM_HEAP_FRAME_POINTER (frame))));
}
#undef FUNC_NAME
SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0,
(SCM frame),
"")
#define FUNC_NAME s_scm_frame_dynamic_link
{
SCM_VALIDATE_HEAP_FRAME (1, frame);
return SCM_FRAME_HEAP_LINK (SCM_HEAP_FRAME_POINTER (frame));
}
#undef FUNC_NAME
SCM_DEFINE (scm_frame_external_link, "frame-external-link", 1, 0, 0,
(SCM frame),
"")
#define FUNC_NAME s_scm_frame_external_link
{
SCM_VALIDATE_HEAP_FRAME (1, frame);
return SCM_FRAME_EXTERNAL_LINK (SCM_HEAP_FRAME_POINTER (frame));
}
#undef FUNC_NAME
void
scm_init_frames (void)
{
scm_tc16_heap_frame = scm_make_smob_type ("frame", 0);
scm_set_smob_mark (scm_tc16_heap_frame, heap_frame_mark);
scm_set_smob_free (scm_tc16_heap_frame, heap_frame_free);
#ifndef SCM_MAGIC_SNARFER
#include "frames.x"
#endif
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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