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56164dc47f
* libguile/smob.h: Regularize the SCM_SMOB macros, and make them all go through some generic SMOB accessor macros. * libguile/smob.c (scm_i_set_smob_flags): Remove, as it is unused.
624 lines
15 KiB
C
624 lines
15 KiB
C
/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2003, 2004, 2006, 2009 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#include "libguile/_scm.h"
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#include "libguile/async.h"
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#include "libguile/goops.h"
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#include "libguile/ports.h"
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include "libguile/smob.h"
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#include "libguile/bdw-gc.h"
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#include <gc/gc_mark.h>
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/* scm_smobs scm_numsmob
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* implement a fixed sized array of smob records.
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* Indexes into this table are used when generating type
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* tags for smobjects (if you know a tag you can get an index and conversely).
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*/
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#define MAX_SMOB_COUNT SCM_I_MAX_SMOB_TYPE_COUNT
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long scm_numsmob;
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scm_smob_descriptor scm_smobs[MAX_SMOB_COUNT];
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void
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scm_assert_smob_type (scm_t_bits tag, SCM val)
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{
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if (!SCM_SMOB_PREDICATE (tag, val))
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scm_wrong_type_arg_msg (NULL, 0, val, scm_smobs[SCM_TC2SMOBNUM(tag)].name);
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}
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/* {Mark}
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*/
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/* This function is vestigial. It used to be the mark function's
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responsibility to set the mark bit on the smob or port, but now the
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generic marking routine in gc.c takes care of that, and a zero
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pointer for a mark function means "don't bother". So you never
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need scm_mark0.
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However, we leave it here because it's harmless to call it, and
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people out there have smob code that uses it, and there's no reason
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to make their links fail. */
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SCM
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scm_mark0 (SCM ptr SCM_UNUSED)
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{
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return SCM_BOOL_F;
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}
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SCM
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/* Dirk::FIXME: The name markcdr is misleading, since the term cdr should only
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be used for real pairs. */
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scm_markcdr (SCM ptr)
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{
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return SCM_CELL_OBJECT_1 (ptr);
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}
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/* {Free}
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*/
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size_t
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scm_free0 (SCM ptr SCM_UNUSED)
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{
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return 0;
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}
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/* {Print}
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*/
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int
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scm_smob_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
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{
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long n = SCM_SMOBNUM (exp);
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scm_puts ("#<", port);
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scm_puts (SCM_SMOBNAME (n) ? SCM_SMOBNAME (n) : "smob", port);
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scm_putc (' ', port);
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if (scm_smobs[n].size)
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scm_uintprint (SCM_CELL_WORD_1 (exp), 16, port);
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else
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scm_uintprint (SCM_UNPACK (exp), 16, port);
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scm_putc ('>', port);
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return 1;
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}
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/* {Apply}
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*/
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#define SCM_SMOB_APPLY0(SMOB) \
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SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB)
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#define SCM_SMOB_APPLY1(SMOB, A1) \
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SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1)
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#define SCM_SMOB_APPLY2(SMOB, A1, A2) \
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SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1, A2)
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#define SCM_SMOB_APPLY3(SMOB, A1, A2, A3) \
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SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1, A2, A3)
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static SCM
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scm_smob_apply_0_010 (SCM smob)
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{
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return SCM_SMOB_APPLY1 (smob, SCM_UNDEFINED);
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}
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static SCM
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scm_smob_apply_0_020 (SCM smob)
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{
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return SCM_SMOB_APPLY2 (smob, SCM_UNDEFINED, SCM_UNDEFINED);
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}
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static SCM
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scm_smob_apply_0_030 (SCM smob)
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{
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return SCM_SMOB_APPLY3 (smob, SCM_UNDEFINED, SCM_UNDEFINED, SCM_UNDEFINED);
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}
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static SCM
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scm_smob_apply_0_001 (SCM smob)
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{
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return SCM_SMOB_APPLY1 (smob, SCM_EOL);
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}
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static SCM
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scm_smob_apply_0_011 (SCM smob)
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{
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return SCM_SMOB_APPLY2 (smob, SCM_UNDEFINED, SCM_EOL);
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}
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static SCM
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scm_smob_apply_0_021 (SCM smob)
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{
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return SCM_SMOB_APPLY3 (smob, SCM_UNDEFINED, SCM_UNDEFINED, SCM_EOL);
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}
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static SCM
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scm_smob_apply_0_error (SCM smob)
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{
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scm_wrong_num_args (smob);
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}
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static SCM
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scm_smob_apply_1_020 (SCM smob, SCM a1)
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{
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return SCM_SMOB_APPLY2 (smob, a1, SCM_UNDEFINED);
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}
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static SCM
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scm_smob_apply_1_030 (SCM smob, SCM a1)
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{
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return SCM_SMOB_APPLY3 (smob, a1, SCM_UNDEFINED, SCM_UNDEFINED);
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}
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static SCM
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scm_smob_apply_1_001 (SCM smob, SCM a1)
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{
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return SCM_SMOB_APPLY1 (smob, scm_list_1 (a1));
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}
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static SCM
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scm_smob_apply_1_011 (SCM smob, SCM a1)
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{
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return SCM_SMOB_APPLY2 (smob, a1, SCM_EOL);
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}
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static SCM
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scm_smob_apply_1_021 (SCM smob, SCM a1)
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{
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return SCM_SMOB_APPLY3 (smob, a1, SCM_UNDEFINED, SCM_EOL);
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}
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static SCM
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scm_smob_apply_1_error (SCM smob, SCM a1 SCM_UNUSED)
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{
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scm_wrong_num_args (smob);
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}
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static SCM
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scm_smob_apply_2_030 (SCM smob, SCM a1, SCM a2)
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{
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return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_UNDEFINED);
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}
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static SCM
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scm_smob_apply_2_001 (SCM smob, SCM a1, SCM a2)
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{
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return SCM_SMOB_APPLY1 (smob, scm_list_2 (a1, a2));
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}
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static SCM
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scm_smob_apply_2_011 (SCM smob, SCM a1, SCM a2)
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{
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return SCM_SMOB_APPLY2 (smob, a1, scm_list_1 (a2));
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}
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static SCM
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scm_smob_apply_2_021 (SCM smob, SCM a1, SCM a2)
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{
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return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_EOL);
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}
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static SCM
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scm_smob_apply_2_error (SCM smob, SCM a1 SCM_UNUSED, SCM a2 SCM_UNUSED)
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{
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scm_wrong_num_args (smob);
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}
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static SCM
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scm_smob_apply_3_030 (SCM smob, SCM a1, SCM a2, SCM rst)
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{
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if (!scm_is_null (SCM_CDR (rst)))
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scm_wrong_num_args (smob);
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return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_CAR (rst));
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}
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static SCM
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scm_smob_apply_3_001 (SCM smob, SCM a1, SCM a2, SCM rst)
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{
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return SCM_SMOB_APPLY1 (smob, scm_cons2 (a1, a2, rst));
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}
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static SCM
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scm_smob_apply_3_011 (SCM smob, SCM a1, SCM a2, SCM rst)
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{
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return SCM_SMOB_APPLY2 (smob, a1, scm_cons (a2, rst));
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}
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static SCM
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scm_smob_apply_3_021 (SCM smob, SCM a1, SCM a2, SCM rst)
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{
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return SCM_SMOB_APPLY3 (smob, a1, a2, rst);
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}
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static SCM
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scm_smob_apply_3_error (SCM smob,
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SCM a1 SCM_UNUSED,
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SCM a2 SCM_UNUSED,
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SCM rst SCM_UNUSED)
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{
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scm_wrong_num_args (smob);
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}
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scm_t_bits
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scm_make_smob_type (char const *name, size_t size)
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#define FUNC_NAME "scm_make_smob_type"
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{
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long new_smob;
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SCM_CRITICAL_SECTION_START;
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new_smob = scm_numsmob;
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if (scm_numsmob != MAX_SMOB_COUNT)
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++scm_numsmob;
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SCM_CRITICAL_SECTION_END;
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if (new_smob == MAX_SMOB_COUNT)
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scm_misc_error (FUNC_NAME, "maximum number of smobs exceeded", SCM_EOL);
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scm_smobs[new_smob].name = name;
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scm_smobs[new_smob].size = size;
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/* Make a class object if Goops is present. */
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if (SCM_UNPACK (scm_smob_class[0]) != 0)
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scm_smob_class[new_smob] = scm_make_extended_class (name, 0);
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return scm_tc7_smob + new_smob * 256;
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}
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#undef FUNC_NAME
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void
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scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].mark = mark;
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}
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void
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scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].free = free;
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}
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void
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scm_set_smob_print (scm_t_bits tc, int (*print) (SCM, SCM, scm_print_state*))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].print = print;
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}
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void
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scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM))
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{
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scm_smobs[SCM_TC2SMOBNUM (tc)].equalp = equalp;
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}
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void
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scm_set_smob_apply (scm_t_bits tc, SCM (*apply) (),
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unsigned int req, unsigned int opt, unsigned int rst)
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{
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SCM (*apply_0) (SCM);
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SCM (*apply_1) (SCM, SCM);
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SCM (*apply_2) (SCM, SCM, SCM);
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SCM (*apply_3) (SCM, SCM, SCM, SCM);
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int type = SCM_GSUBR_MAKTYPE (req, opt, rst);
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if (rst > 1 || req + opt + rst > 3)
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{
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puts ("Unsupported smob application type");
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abort ();
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}
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (0, 0, 0):
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apply_0 = apply; break;
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case SCM_GSUBR_MAKTYPE (0, 1, 0):
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apply_0 = scm_smob_apply_0_010; break;
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case SCM_GSUBR_MAKTYPE (0, 2, 0):
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apply_0 = scm_smob_apply_0_020; break;
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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apply_0 = scm_smob_apply_0_030; break;
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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apply_0 = scm_smob_apply_0_001; break;
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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apply_0 = scm_smob_apply_0_011; break;
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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apply_0 = scm_smob_apply_0_021; break;
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default:
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apply_0 = scm_smob_apply_0_error; break;
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}
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (1, 0, 0):
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case SCM_GSUBR_MAKTYPE (0, 1, 0):
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apply_1 = apply; break;
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case SCM_GSUBR_MAKTYPE (1, 1, 0):
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case SCM_GSUBR_MAKTYPE (0, 2, 0):
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apply_1 = scm_smob_apply_1_020; break;
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case SCM_GSUBR_MAKTYPE (1, 2, 0):
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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apply_1 = scm_smob_apply_1_030; break;
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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apply_1 = scm_smob_apply_1_001; break;
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case SCM_GSUBR_MAKTYPE (1, 0, 1):
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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apply_1 = scm_smob_apply_1_011; break;
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case SCM_GSUBR_MAKTYPE (1, 1, 1):
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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apply_1 = scm_smob_apply_1_021; break;
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default:
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apply_1 = scm_smob_apply_1_error; break;
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}
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (2, 0, 0):
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case SCM_GSUBR_MAKTYPE (1, 1, 0):
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case SCM_GSUBR_MAKTYPE (0, 2, 0):
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apply_2 = apply; break;
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case SCM_GSUBR_MAKTYPE (2, 1, 0):
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case SCM_GSUBR_MAKTYPE (1, 2, 0):
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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apply_2 = scm_smob_apply_2_030; break;
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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apply_2 = scm_smob_apply_2_001; break;
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case SCM_GSUBR_MAKTYPE (1, 0, 1):
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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apply_2 = scm_smob_apply_2_011; break;
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case SCM_GSUBR_MAKTYPE (2, 0, 1):
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case SCM_GSUBR_MAKTYPE (1, 1, 1):
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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apply_2 = scm_smob_apply_2_021; break;
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default:
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apply_2 = scm_smob_apply_2_error; break;
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}
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switch (type)
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{
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case SCM_GSUBR_MAKTYPE (3, 0, 0):
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case SCM_GSUBR_MAKTYPE (2, 1, 0):
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case SCM_GSUBR_MAKTYPE (1, 2, 0):
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case SCM_GSUBR_MAKTYPE (0, 3, 0):
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apply_3 = scm_smob_apply_3_030; break;
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case SCM_GSUBR_MAKTYPE (0, 0, 1):
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apply_3 = scm_smob_apply_3_001; break;
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case SCM_GSUBR_MAKTYPE (1, 0, 1):
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case SCM_GSUBR_MAKTYPE (0, 1, 1):
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apply_3 = scm_smob_apply_3_011; break;
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case SCM_GSUBR_MAKTYPE (2, 0, 1):
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case SCM_GSUBR_MAKTYPE (1, 1, 1):
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case SCM_GSUBR_MAKTYPE (0, 2, 1):
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apply_3 = scm_smob_apply_3_021; break;
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default:
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apply_3 = scm_smob_apply_3_error; break;
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}
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scm_smobs[SCM_TC2SMOBNUM (tc)].apply = apply;
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scm_smobs[SCM_TC2SMOBNUM (tc)].apply_0 = apply_0;
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scm_smobs[SCM_TC2SMOBNUM (tc)].apply_1 = apply_1;
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scm_smobs[SCM_TC2SMOBNUM (tc)].apply_2 = apply_2;
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scm_smobs[SCM_TC2SMOBNUM (tc)].apply_3 = apply_3;
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scm_smobs[SCM_TC2SMOBNUM (tc)].gsubr_type = type;
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if (SCM_UNPACK (scm_smob_class[0]) != 0)
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scm_i_inherit_applicable (scm_smob_class[SCM_TC2SMOBNUM (tc)]);
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}
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SCM
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scm_make_smob (scm_t_bits tc)
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{
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scm_t_bits n = SCM_TC2SMOBNUM (tc);
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size_t size = scm_smobs[n].size;
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scm_t_bits data = (size > 0
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? (scm_t_bits) scm_gc_malloc (size, SCM_SMOBNAME (n))
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: 0);
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SCM_RETURN_NEWSMOB (tc, data);
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}
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/* Marking SMOBs using user-supplied mark procedures. */
|
||
|
||
|
||
/* The GC kind used for SMOB types that provide a custom mark procedure. */
|
||
static int smob_gc_kind;
|
||
|
||
|
||
/* The generic SMOB mark procedure that gets called for SMOBs allocated with
|
||
`scm_i_new_smob_with_mark_proc ()'. */
|
||
static struct GC_ms_entry *
|
||
smob_mark (GC_word *addr, struct GC_ms_entry *mark_stack_ptr,
|
||
struct GC_ms_entry *mark_stack_limit, GC_word env)
|
||
{
|
||
register SCM cell;
|
||
register scm_t_bits tc, smobnum;
|
||
|
||
cell = PTR2SCM (addr);
|
||
|
||
if (SCM_TYP7 (cell) != scm_tc7_smob)
|
||
/* It is likely that the GC passed us a pointer to a free-list element
|
||
which we must ignore (see warning in `gc/gc_mark.h'). */
|
||
return mark_stack_ptr;
|
||
|
||
tc = SCM_CELL_WORD_0 (cell);
|
||
smobnum = SCM_TC2SMOBNUM (tc);
|
||
|
||
if (smobnum >= scm_numsmob)
|
||
/* The first word looks corrupt. */
|
||
abort ();
|
||
|
||
mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (SCM_CELL_OBJECT_1 (cell)),
|
||
mark_stack_ptr,
|
||
mark_stack_limit, NULL);
|
||
mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (SCM_CELL_OBJECT_2 (cell)),
|
||
mark_stack_ptr,
|
||
mark_stack_limit, NULL);
|
||
mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (SCM_CELL_OBJECT_3 (cell)),
|
||
mark_stack_ptr,
|
||
mark_stack_limit, NULL);
|
||
|
||
if (scm_smobs[smobnum].mark)
|
||
{
|
||
SCM obj;
|
||
|
||
SCM_I_CURRENT_THREAD->current_mark_stack_ptr = mark_stack_ptr;
|
||
SCM_I_CURRENT_THREAD->current_mark_stack_limit = mark_stack_limit;
|
||
|
||
/* Invoke the SMOB's mark procedure, which will in turn invoke
|
||
`scm_gc_mark ()', which may modify `current_mark_stack_ptr'. */
|
||
obj = scm_smobs[smobnum].mark (cell);
|
||
|
||
mark_stack_ptr = SCM_I_CURRENT_THREAD->current_mark_stack_ptr;
|
||
|
||
if (SCM_NIMP (obj))
|
||
/* Mark the returned object. */
|
||
mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (obj),
|
||
mark_stack_ptr,
|
||
mark_stack_limit, NULL);
|
||
|
||
SCM_I_CURRENT_THREAD->current_mark_stack_limit = NULL;
|
||
SCM_I_CURRENT_THREAD->current_mark_stack_ptr = NULL;
|
||
}
|
||
|
||
return mark_stack_ptr;
|
||
|
||
}
|
||
|
||
/* Mark object O. We assume that this function is only called during the
|
||
mark phase, i.e., from within `smob_mark ()' or one of its
|
||
descendents. */
|
||
void
|
||
scm_gc_mark (SCM o)
|
||
{
|
||
#define CURRENT_MARK_PTR \
|
||
((struct GC_ms_entry *)(SCM_I_CURRENT_THREAD->current_mark_stack_ptr))
|
||
#define CURRENT_MARK_LIMIT \
|
||
((struct GC_ms_entry *)(SCM_I_CURRENT_THREAD->current_mark_stack_limit))
|
||
|
||
if (SCM_NIMP (o))
|
||
{
|
||
/* At this point, the `current_mark_*' fields of the current thread
|
||
must be defined (they are set in `smob_mark ()'). */
|
||
register struct GC_ms_entry *mark_stack_ptr;
|
||
|
||
if (!CURRENT_MARK_PTR)
|
||
/* The function was not called from a mark procedure. */
|
||
abort ();
|
||
|
||
mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (o),
|
||
CURRENT_MARK_PTR, CURRENT_MARK_LIMIT,
|
||
NULL);
|
||
SCM_I_CURRENT_THREAD->current_mark_stack_ptr = mark_stack_ptr;
|
||
}
|
||
#undef CURRENT_MARK_PTR
|
||
#undef CURRENT_MARK_LIMIT
|
||
}
|
||
|
||
/* Return a SMOB with typecode TC. The SMOB type corresponding to TC may
|
||
provide a custom mark procedure and it will be honored. */
|
||
SCM
|
||
scm_i_new_smob_with_mark_proc (scm_t_bits tc, scm_t_bits data1,
|
||
scm_t_bits data2, scm_t_bits data3)
|
||
{
|
||
/* Return a double cell. */
|
||
SCM cell = SCM_PACK (GC_generic_malloc (2 * sizeof (scm_t_cell),
|
||
smob_gc_kind));
|
||
|
||
SCM_SET_CELL_WORD_3 (cell, data3);
|
||
SCM_SET_CELL_WORD_2 (cell, data2);
|
||
SCM_SET_CELL_WORD_1 (cell, data1);
|
||
SCM_SET_CELL_WORD_0 (cell, tc);
|
||
|
||
return cell;
|
||
}
|
||
|
||
|
||
/* Finalize SMOB by calling its SMOB type's free function, if any. */
|
||
void
|
||
scm_i_finalize_smob (GC_PTR ptr, GC_PTR data)
|
||
{
|
||
SCM smob;
|
||
size_t (* free_smob) (SCM);
|
||
|
||
smob = PTR2SCM (ptr);
|
||
#if 0
|
||
printf ("finalizing SMOB %p (smobnum: %u)\n",
|
||
ptr, SCM_SMOBNUM (smob));
|
||
#endif
|
||
|
||
free_smob = scm_smobs[SCM_SMOBNUM (smob)].free;
|
||
if (free_smob)
|
||
free_smob (smob);
|
||
}
|
||
|
||
|
||
void
|
||
scm_smob_prehistory ()
|
||
{
|
||
long i;
|
||
|
||
smob_gc_kind = GC_new_kind (GC_new_free_list (),
|
||
GC_MAKE_PROC (GC_new_proc (smob_mark), 0),
|
||
0,
|
||
/* Clear new objects. As of version 7.1, libgc
|
||
doesn't seem to support passing 0 here. */
|
||
1);
|
||
|
||
scm_numsmob = 0;
|
||
for (i = 0; i < MAX_SMOB_COUNT; ++i)
|
||
{
|
||
scm_smobs[i].name = 0;
|
||
scm_smobs[i].size = 0;
|
||
scm_smobs[i].mark = 0;
|
||
scm_smobs[i].free = 0;
|
||
scm_smobs[i].print = scm_smob_print;
|
||
scm_smobs[i].equalp = 0;
|
||
scm_smobs[i].apply = 0;
|
||
scm_smobs[i].apply_0 = 0;
|
||
scm_smobs[i].apply_1 = 0;
|
||
scm_smobs[i].apply_2 = 0;
|
||
scm_smobs[i].apply_3 = 0;
|
||
scm_smobs[i].gsubr_type = 0;
|
||
}
|
||
}
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|