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6978c67339
* libguile/foreign.c (scm_set_pointer_finalizer_x) * libguile/ports.c (finalize_port, scm_c_make_port_with_encoding) (open_iconv_descriptors) * libguile/smob.c (scm_i_new_smob, scm_i_new_double_smob) * libguile/struct.c (scm_i_alloc_struct) * libguile/weak-set.c (weak_gc_finalizer) (scm_c_register_weak_gc_callback) * libguile/weak-table.c (scm_c_register_weak_gc_callback) (weak_gc_finalizer) * libguile/numbers.c (make_bignum): Use the new API.
665 lines
21 KiB
C
665 lines
21 KiB
C
/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2003, 2004, 2006, 2009, 2010, 2011, 2012 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 <stdlib.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/instructions.h"
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#include "libguile/objcodes.h"
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#include "libguile/programs.h"
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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_unlocked ("#<", port);
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scm_puts_unlocked (SCM_SMOBNAME (n) ? SCM_SMOBNAME (n) : "smob", port);
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scm_putc_unlocked (' ', 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_unlocked ('>', port);
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return 1;
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}
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/* {Apply}
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*/
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#ifdef WORDS_BIGENDIAN
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#define OBJCODE_HEADER 0, 0, 0, 16, 0, 0, 0, 40
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#define META_HEADER 0, 0, 0, 32, 0, 0, 0, 0
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#else
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#define OBJCODE_HEADER 16, 0, 0, 0, 40, 0, 0, 0
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#define META_HEADER 32, 0, 0, 0, 0, 0, 0, 0
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#endif
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/* This code is the same as in gsubr.c, except we use smob_call instead of
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struct_call. */
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/* A: req; B: opt; C: rest */
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#define A(nreq) \
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OBJCODE_HEADER, \
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/* 0 */ scm_op_assert_nargs_ee, 0, nreq, /* assert number of args */ \
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/* 3 */ scm_op_object_ref, 0, /* push the foreign object wrapping the subr pointer */ \
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/* 5 */ scm_op_smob_call, nreq, /* and call (will return value as well) */ \
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/* 7 */ scm_op_nop, \
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/* 8 */ scm_op_nop, scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 12 */ scm_op_nop, scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 16 */ META (3, 7, nreq, 0, 0)
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#define B(nopt) \
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OBJCODE_HEADER, \
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/* 0 */ scm_op_bind_optionals, 0, nopt, /* bind optionals */ \
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/* 3 */ scm_op_assert_nargs_ee, 0, nopt, /* assert number of args */ \
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/* 6 */ scm_op_object_ref, 0, /* push the foreign object wrapping the smob pointer */ \
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/* 8 */ scm_op_smob_call, nopt, /* and call (will return value as well) */ \
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/* 10 */ scm_op_nop, scm_op_nop, \
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/* 12 */ scm_op_nop, scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 16 */ META (6, 10, 0, nopt, 0)
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#define C() \
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OBJCODE_HEADER, \
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/* 0 */ scm_op_push_rest, 0, 0, /* cons all args into a list */ \
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/* 3 */ scm_op_object_ref, 0, /* push the foreign object wrapping the smob pointer */ \
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/* 5 */ scm_op_smob_call, 1, /* and call (will return value as well) */ \
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/* 7 */ scm_op_nop, \
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/* 8 */ scm_op_nop, scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 12 */ scm_op_nop, scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 16 */ META (3, 7, 0, 0, 1)
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#define AB(nreq, nopt) \
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OBJCODE_HEADER, \
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/* 0 */ scm_op_assert_nargs_ge, 0, nreq, /* assert number of args */ \
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/* 3 */ scm_op_bind_optionals, 0, nreq+nopt, /* bind optionals */ \
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/* 6 */ scm_op_assert_nargs_ee, 0, nreq+nopt, /* assert number of args */ \
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/* 9 */ scm_op_object_ref, 0, /* push the foreign object wrapping the smob pointer */ \
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/* 11 */ scm_op_smob_call, nreq+nopt, /* and call (will return value as well) */ \
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/* 13 */ scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 16 */ META (9, 13, nreq, nopt, 0)
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#define AC(nreq) \
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OBJCODE_HEADER, \
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/* 0 */ scm_op_assert_nargs_ge, 0, nreq, /* assert number of args */ \
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/* 3 */ scm_op_push_rest, 0, nreq, /* cons rest list */ \
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/* 6 */ scm_op_object_ref, 0, /* push the foreign object wrapping the smob pointer */ \
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/* 8 */ scm_op_smob_call, nreq+1, /* and call (will return value as well) */ \
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/* 10 */ scm_op_nop, scm_op_nop, \
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/* 12 */ scm_op_nop, scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 16 */ META (6, 10, nreq, 0, 1)
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#define BC(nopt) \
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OBJCODE_HEADER, \
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/* 0 */ scm_op_bind_optionals, 0, nopt, /* bind optionals */ \
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/* 3 */ scm_op_push_rest, 0, nopt, /* cons rest list */ \
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/* 6 */ scm_op_object_ref, 0, /* push the foreign object wrapping the smob pointer */ \
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/* 8 */ scm_op_smob_call, nopt+1, /* and call (will return value as well) */ \
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/* 10 */ scm_op_nop, scm_op_nop, \
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/* 12 */ scm_op_nop, scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 16 */ META (6, 10, 0, nopt, 1)
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#define ABC(nreq, nopt) \
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OBJCODE_HEADER, \
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/* 0 */ scm_op_assert_nargs_ge, 0, nreq, /* assert number of args */ \
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/* 3 */ scm_op_bind_optionals, 0, nreq+nopt, /* bind optionals */ \
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/* 6 */ scm_op_push_rest, 0, nreq+nopt, /* cons rest list */ \
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/* 9 */ scm_op_object_ref, 0, /* push the foreign object wrapping the smob pointer */ \
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/* 11 */ scm_op_smob_call, nreq+nopt+1, /* and call (will return value as well) */ \
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/* 13 */ scm_op_nop, scm_op_nop, scm_op_nop, \
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/* 16 */ META (9, 13, nreq, nopt, 1)
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#define META(start, end, nreq, nopt, rest) \
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META_HEADER, \
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/* 0 */ scm_op_make_eol, /* bindings */ \
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/* 1 */ scm_op_make_eol, /* sources */ \
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/* 2 */ scm_op_make_int8, start, scm_op_make_int8, end, /* arity: from ip N to ip N */ \
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/* 6 */ scm_op_make_int8, nreq, /* the arity is N required args */ \
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/* 8 */ scm_op_make_int8, nopt, /* N optionals */ \
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/* 10 */ rest ? scm_op_make_true : scm_op_make_false, /* maybe a rest arg */ \
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/* 11 */ scm_op_list, 0, 5, /* make a list of those 5 vals */ \
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/* 14 */ scm_op_list, 0, 1, /* and the arities will be a list of that one list */ \
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/* 17 */ scm_op_load_symbol, 0, 0, 4, 'n', 'a', 'm', 'e', /* `name' */ \
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/* 25 */ scm_op_object_ref, 1, /* the name from the object table */ \
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/* 27 */ scm_op_cons, /* make a pair for the properties */ \
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/* 28 */ scm_op_list, 0, 4, /* pack bindings, sources, and arities into list */ \
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/* 31 */ scm_op_return /* and return */ \
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/* 32 */
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static const struct
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{
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scm_t_uint64 dummy; /* ensure 8-byte alignment; perhaps there's a better way */
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const scm_t_uint8 bytes[16 * (sizeof (struct scm_objcode) + 16
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+ sizeof (struct scm_objcode) + 32)];
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} raw_bytecode = {
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0,
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{
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/* Use the elisp macros from gsubr.c */
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/* C-u 3 M-x generate-bytecodes RET */
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/* 0 arguments */
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A(0),
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/* 1 arguments */
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A(1), B(1), C(),
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/* 2 arguments */
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A(2), AB(1,1), B(2), AC(1), BC(1),
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/* 3 arguments */
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A(3), AB(2,1), AB(1,2), B(3), AC(2), ABC(1,1), BC(2)
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}
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};
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#undef A
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#undef B
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#undef C
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#undef AB
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#undef AC
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#undef BC
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#undef ABC
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#undef OBJCODE_HEADER
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#undef META_HEADER
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#undef META
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#define STATIC_OBJCODE_TAG \
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SCM_PACK (SCM_MAKE_OBJCODE_TAG (SCM_OBJCODE_TYPE_STATIC, 0))
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static const struct
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{
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scm_t_uint64 dummy; /* alignment */
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scm_t_cell cells[16 * 2]; /* 4*4 double cells */
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} objcode_cells = {
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0,
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/* C-u 3 M-x generate-objcode-cells RET */
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{
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/* 0 arguments */
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 0) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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/* 1 arguments */
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 64) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 128) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 192) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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/* 2 arguments */
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 256) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 320) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 384) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 448) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 512) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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/* 3 arguments */
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 576) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 640) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 704) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 768) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 832) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 896) },
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{ SCM_BOOL_F, SCM_PACK (0) },
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{ STATIC_OBJCODE_TAG, SCM_PACK (raw_bytecode.bytes + 960) },
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{ SCM_BOOL_F, SCM_PACK (0) }
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}
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};
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static const SCM scm_smob_objcode_trampolines[16] = {
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/* C-u 3 M-x generate-objcodes RET */
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/* 0 arguments */
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SCM_PACK (objcode_cells.cells+0),
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/* 1 arguments */
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SCM_PACK (objcode_cells.cells+2),
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SCM_PACK (objcode_cells.cells+4),
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SCM_PACK (objcode_cells.cells+6),
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/* 2 arguments */
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SCM_PACK (objcode_cells.cells+8),
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SCM_PACK (objcode_cells.cells+10),
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SCM_PACK (objcode_cells.cells+12),
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SCM_PACK (objcode_cells.cells+14),
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SCM_PACK (objcode_cells.cells+16),
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/* 3 arguments */
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SCM_PACK (objcode_cells.cells+18),
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SCM_PACK (objcode_cells.cells+20),
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SCM_PACK (objcode_cells.cells+22),
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SCM_PACK (objcode_cells.cells+24),
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SCM_PACK (objcode_cells.cells+26),
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SCM_PACK (objcode_cells.cells+28),
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SCM_PACK (objcode_cells.cells+30)
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};
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/* (nargs * nargs) + nopt + rest * (nargs + 1) */
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#define SCM_SMOB_OBJCODE_TRAMPOLINE(nreq,nopt,rest) \
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scm_smob_objcode_trampolines[(nreq + nopt + rest) * (nreq + nopt + rest) \
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+ nopt + rest * (nreq + nopt + rest + 1)]
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static SCM
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scm_smob_objcode_trampoline (unsigned int nreq, unsigned int nopt,
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unsigned int rest)
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{
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if (SCM_UNLIKELY (rest > 1 || nreq + nopt + rest > 3))
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scm_out_of_range ("make-smob", scm_from_uint (nreq + nopt + rest));
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return SCM_SMOB_OBJCODE_TRAMPOLINE (nreq, nopt, rest);
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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_smobs[SCM_TC2SMOBNUM (tc)].apply = apply;
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scm_smobs[SCM_TC2SMOBNUM (tc)].apply_trampoline_objcode
|
||
= scm_smob_objcode_trampoline (req, opt, rst);
|
||
|
||
if (SCM_UNPACK (scm_smob_class[0]) != 0)
|
||
scm_i_inherit_applicable (scm_smob_class[SCM_TC2SMOBNUM (tc)]);
|
||
}
|
||
|
||
static SCM tramp_weak_map = SCM_BOOL_F;
|
||
|
||
SCM
|
||
scm_i_smob_apply_trampoline (SCM smob)
|
||
{
|
||
SCM tramp;
|
||
|
||
tramp = scm_weak_table_refq (tramp_weak_map, smob, SCM_BOOL_F);
|
||
|
||
if (scm_is_true (tramp))
|
||
return tramp;
|
||
else
|
||
{
|
||
const char *name;
|
||
SCM objtable;
|
||
|
||
name = SCM_SMOBNAME (SCM_SMOBNUM (smob));
|
||
if (!name)
|
||
name = "smob-apply";
|
||
objtable = scm_c_make_vector (2, SCM_UNDEFINED);
|
||
SCM_SIMPLE_VECTOR_SET (objtable, 0, smob);
|
||
SCM_SIMPLE_VECTOR_SET (objtable, 1, scm_from_utf8_symbol (name));
|
||
tramp = scm_make_program (SCM_SMOB_DESCRIPTOR (smob).apply_trampoline_objcode,
|
||
objtable, SCM_BOOL_F);
|
||
|
||
/* Race conditions (between the ref and this set!) cannot cause
|
||
any harm here. */
|
||
scm_weak_table_putq_x (tramp_weak_map, smob, tramp);
|
||
return tramp;
|
||
}
|
||
}
|
||
|
||
SCM
|
||
scm_make_smob (scm_t_bits tc)
|
||
{
|
||
scm_t_bits n = SCM_TC2SMOBNUM (tc);
|
||
size_t size = scm_smobs[n].size;
|
||
scm_t_bits data = (size > 0
|
||
? (scm_t_bits) scm_gc_malloc (size, SCM_SMOBNAME (n))
|
||
: 0);
|
||
|
||
SCM_RETURN_NEWSMOB (tc, data);
|
||
}
|
||
|
||
|
||
|
||
/* 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 smob_gc_kind. */
|
||
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 = SCM_PACK_POINTER (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_HEAP_OBJECT_P (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_HEAP_OBJECT_P (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
|
||
}
|
||
|
||
|
||
/* Finalize SMOB by calling its SMOB type's free function, if any. */
|
||
static void
|
||
finalize_smob (GC_PTR ptr, GC_PTR data)
|
||
{
|
||
SCM smob;
|
||
size_t (* free_smob) (SCM);
|
||
|
||
smob = SCM_PACK_POINTER (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);
|
||
}
|
||
|
||
/* 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 (scm_t_bits tc, scm_t_bits data)
|
||
{
|
||
scm_t_bits smobnum = SCM_TC2SMOBNUM (tc);
|
||
SCM ret;
|
||
|
||
/* Use the smob_gc_kind if needed to allow the mark procedure to
|
||
run. Since the marker only deals with double cells, that case
|
||
allocates a double cell. We leave words 2 and 3 to there initial
|
||
values, which is 0. */
|
||
if (scm_smobs [smobnum].mark)
|
||
ret = SCM_PACK_POINTER (GC_generic_malloc (2 * sizeof (scm_t_cell), smob_gc_kind));
|
||
else
|
||
ret = SCM_PACK_POINTER (GC_MALLOC (sizeof (scm_t_cell)));
|
||
|
||
SCM_SET_CELL_WORD_1 (ret, data);
|
||
SCM_SET_CELL_WORD_0 (ret, tc);
|
||
|
||
if (scm_smobs[smobnum].free)
|
||
scm_i_set_finalizer (SCM2PTR (ret), finalize_smob, NULL);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* 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_double_smob (scm_t_bits tc, scm_t_bits data1,
|
||
scm_t_bits data2, scm_t_bits data3)
|
||
{
|
||
scm_t_bits smobnum = SCM_TC2SMOBNUM (tc);
|
||
SCM ret;
|
||
|
||
/* Use the smob_gc_kind if needed to allow the mark procedure to
|
||
run. */
|
||
if (scm_smobs [smobnum].mark)
|
||
ret = SCM_PACK_POINTER (GC_generic_malloc (2 * sizeof (scm_t_cell), smob_gc_kind));
|
||
else
|
||
ret = SCM_PACK_POINTER (GC_MALLOC (2 * sizeof (scm_t_cell)));
|
||
|
||
SCM_SET_CELL_WORD_3 (ret, data3);
|
||
SCM_SET_CELL_WORD_2 (ret, data2);
|
||
SCM_SET_CELL_WORD_1 (ret, data1);
|
||
SCM_SET_CELL_WORD_0 (ret, tc);
|
||
|
||
if (scm_smobs[smobnum].free)
|
||
scm_i_set_finalizer (SCM2PTR (ret), finalize_smob, NULL);
|
||
|
||
return ret;
|
||
}
|
||
|
||
|
||
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_trampoline_objcode = SCM_BOOL_F;
|
||
}
|
||
|
||
tramp_weak_map = scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY);
|
||
}
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|