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136 lines
6.3 KiB
C
136 lines
6.3 KiB
C
/* classes: h_files */
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#ifndef STRUCTH
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#define STRUCTH
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/* Copyright (C) 1995, 1997, 1999, 2000 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, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 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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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include "libguile/__scm.h"
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#include "libguile/print.h"
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/* Number of words with negative index */
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#define scm_struct_n_extra_words 4
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#define scm_struct_entity_n_extra_words 6
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/* These are how the initial words of a vtable are allocated. */
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#define scm_struct_i_setter -6 /* Setter */
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#define scm_struct_i_procedure -5 /* Optional procedure slot */
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#define scm_struct_i_free -4 /* Destructor */
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#define scm_struct_i_ptr -3 /* Start of block (see alloc_struct) */
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#define scm_struct_i_n_words -2 /* How many words allocated to this struct? */
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#define scm_struct_i_size -1 /* Instance size */
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#define scm_struct_i_flags -1 /* Upper 12 bits used as flags */
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#define scm_vtable_index_layout 0 /* A symbol describing the physical arrangement of this type. */
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#define scm_vtable_index_vcell 1 /* An opaque word, managed by the garbage collector. */
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#define scm_vtable_index_vtable 2 /* A pointer to the handle for this vtable. */
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#define scm_vtable_index_printer 3 /* A printer for this struct type. */
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#define scm_vtable_offset_user 4 /* Where do user fields start? */
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typedef size_t (*scm_struct_free_t) (scm_bits_t * vtable, scm_bits_t * data);
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#define SCM_STRUCTF_MASK (0xFFF << 20)
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#define SCM_STRUCTF_ENTITY (1L << 30) /* Indicates presence of proc slots */
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#define SCM_STRUCTF_LIGHT (1L << 31) /* Light representation
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(no hidden words) */
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/* Dirk:FIXME:: the SCM_STRUCTP predicate is also fulfilled for glocs */
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#define SCM_STRUCTP(X) (SCM_NIMP(X) && (SCM_TYP3(X) == scm_tc3_cons_gloc))
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#define SCM_STRUCT_DATA(X) ((scm_bits_t *) SCM_CELL_WORD_1 (X))
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#define SCM_STRUCT_VTABLE_DATA(X) ((scm_bits_t *) (SCM_CELL_WORD_0 (X) - scm_tc3_cons_gloc))
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#define SCM_STRUCT_LAYOUT(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_layout]))
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#define SCM_SET_STRUCT_LAYOUT(X, v) (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_layout] = SCM_UNPACK (v))
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#define SCM_STRUCT_VTABLE(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_vtable]))
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#define SCM_STRUCT_PRINTER(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_printer]))
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#define SCM_SET_STRUCT_PRINTER(x, v)\
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(SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_printer] = (v))
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#define SCM_SET_VTABLE_DESTRUCTOR(X, D) (SCM_STRUCT_DATA (X) [scm_struct_i_free] = (scm_bits_t) (D))
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/* Efficiency is important in the following macro, since it's used in GC */
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#define SCM_LAYOUT_TAILP(X) (((X) & 32) == 0) /* R, W or O */
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#define SCM_STRUCT_TABLE_NAME(X) SCM_CAR (X)
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#define SCM_SET_STRUCT_TABLE_NAME(X, NAME) SCM_SETCAR (X, NAME)
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#define SCM_STRUCT_TABLE_CLASS(X) SCM_CDR (X)
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#define SCM_SET_STRUCT_TABLE_CLASS(X, CLASS) SCM_SETCDR (X, CLASS)
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extern SCM scm_struct_table;
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#define SCM_STRUCT_GC_CHAIN(X) SCM_CELL_OBJECT_3 (X)
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#define SCM_SET_STRUCT_GC_CHAIN(X, Y) SCM_SET_CELL_OBJECT_3 (X, Y)
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extern SCM scm_structs_to_free;
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extern scm_bits_t * scm_alloc_struct (int n_words, int n_extra, char * who);
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extern size_t scm_struct_free_0 (scm_bits_t * vtable, scm_bits_t * data);
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extern size_t scm_struct_free_light (scm_bits_t * vtable, scm_bits_t * data);
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extern size_t scm_struct_free_standard (scm_bits_t * vtable, scm_bits_t * data);
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extern size_t scm_struct_free_entity (scm_bits_t * vtable, scm_bits_t * data);
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extern SCM scm_make_struct_layout (SCM fields);
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extern SCM scm_struct_p (SCM x);
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extern SCM scm_struct_vtable_p (SCM x);
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extern SCM scm_make_struct (SCM vtable, SCM tail_array_size, SCM init);
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extern SCM scm_make_vtable_vtable (SCM extra_fields, SCM tail_array_size, SCM init);
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extern SCM scm_struct_ref (SCM handle, SCM pos);
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extern SCM scm_struct_set_x (SCM handle, SCM pos, SCM val);
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extern SCM scm_struct_vtable (SCM handle);
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extern SCM scm_struct_vtable_tag (SCM handle);
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extern unsigned long scm_struct_ihashq (SCM obj, unsigned long n);
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extern SCM scm_struct_create_handle (SCM obj);
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extern SCM scm_struct_vtable_name (SCM vtable);
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extern SCM scm_set_struct_vtable_name_x (SCM vtable, SCM name);
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extern void scm_print_struct (SCM exp, SCM port, scm_print_state *);
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extern void scm_struct_prehistory (void);
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extern void scm_init_struct (void);
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#endif /* STRUCTH */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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