[bpt/guile.git] / libguile / smob.h

/* classes: h_files */

#ifndef SCM_SMOB_H
#define SCM_SMOB_H

/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2004, 2006 Free Software Foundation, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

\f

#include "libguile/__scm.h"
#include "libguile/print.h"

#include "libguile/boehm-gc.h"


\f
/* This is the internal representation of a smob type */

typedef struct scm_smob_descriptor
{
  char const *name;
  size_t size;
  SCM (*mark) (SCM);
  size_t (*free) (SCM);
  int (*print) (SCM exp, SCM port, scm_print_state *pstate);
  SCM (*equalp) (SCM, SCM);
  SCM (*apply) ();
  SCM (*apply_0) (SCM);
  SCM (*apply_1) (SCM, SCM);
  SCM (*apply_2) (SCM, SCM, SCM);
  SCM (*apply_3) (SCM, SCM, SCM, SCM);
  int gsubr_type; /* Used in procprop.c */
} scm_smob_descriptor;


\f
SCM_API SCM scm_i_new_smob_with_mark_proc (scm_t_bits tc,
					   scm_t_bits, scm_t_bits, scm_t_bits);


#define SCM_NEWSMOB(z, tc, data)					  \
do									  \
  {									  \
    register scm_t_bits _smobnum = SCM_TC2SMOBNUM (tc);			  \
    z = (scm_smobs[_smobnum].mark					  \
	 ? scm_i_new_smob_with_mark_proc ((tc), (scm_t_bits)(data),	  \
					  0, 0)				  \
	 : scm_cell (tc, (scm_t_bits)(data)));				  \
    if (scm_smobs[_smobnum].free)					  \
      {									  \
	GC_finalization_proc _prev_finalizer;				  \
	GC_PTR _prev_finalizer_data;					  \
									  \
	GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (z), scm_i_finalize_smob, \
					NULL,				  \
					&_prev_finalizer,		  \
					&_prev_finalizer_data);		  \
      }									  \
  }									  \
while (0)

#define SCM_RETURN_NEWSMOB(tc, data)			\
  do { SCM __SCM_smob_answer;				\
       SCM_NEWSMOB (__SCM_smob_answer, (tc), (data));	\
       return __SCM_smob_answer;			\
  } while (0)

#define SCM_NEWSMOB2(z, tc, data1, data2)	\
  SCM_NEWSMOB3 (z, tc, data1, data2, 0)

#define SCM_RETURN_NEWSMOB2(tc, data1, data2)				\
  do { SCM __SCM_smob_answer;						\
       SCM_NEWSMOB2 (__SCM_smob_answer, (tc), (data1), (data2));	\
       return __SCM_smob_answer;					\
  } while (0)

#define SCM_NEWSMOB3(z, tc, data1, data2, data3)			  \
do									  \
  {									  \
    register scm_t_bits _smobnum = SCM_TC2SMOBNUM (tc);			  \
    z = (scm_smobs[_smobnum].mark					  \
	 ? scm_i_new_smob_with_mark_proc (tc, (scm_t_bits)(data1),	  \
					  (scm_t_bits)(data2),		  \
					  (scm_t_bits)(data3))		  \
	 : scm_double_cell ((tc), (scm_t_bits)(data1),			  \
			    (scm_t_bits)(data2),			  \
			    (scm_t_bits)(data3)));			  \
    if (scm_smobs[_smobnum].free)					  \
      {									  \
	GC_finalization_proc _prev_finalizer;				  \
	GC_PTR _prev_finalizer_data;					  \
									  \
	GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (z), scm_i_finalize_smob, \
					NULL,				  \
					&_prev_finalizer,		  \
					&_prev_finalizer_data);		  \
      }									  \
  }									  \
while (0)

#define SCM_RETURN_NEWSMOB3(tc, data1, data2, data3)			    \
  do { SCM __SCM_smob_answer;						    \
       SCM_NEWSMOB3 (__SCM_smob_answer, (tc), (data1), (data2), (data3));   \
       return __SCM_smob_answer;					    \
  } while (0)


#define SCM_SMOB_FLAGS(x)               (SCM_CELL_WORD_0 (x) >> 16)
#define SCM_SMOB_DATA(x)		(SCM_CELL_WORD_1 (x))
#define SCM_SMOB_DATA_2(x)		(SCM_CELL_WORD_2 (x))
#define SCM_SMOB_DATA_3(x)		(SCM_CELL_WORD_3 (x))
#define SCM_SET_SMOB_DATA(x, data)	(SCM_SET_CELL_WORD_1 ((x), (data)))
#define SCM_SET_SMOB_DATA_2(x, data)	(SCM_SET_CELL_WORD_2 ((x), (data)))
#define SCM_SET_SMOB_DATA_3(x, data)	(SCM_SET_CELL_WORD_3 ((x), (data)))
#define SCM_SET_SMOB_FLAGS(x, data)     (scm_i_set_smob_flags((x),(data)<<16))

#define SCM_SMOB_OBJECT(x)		(SCM_CELL_OBJECT_1 (x))
#define SCM_SMOB_OBJECT_2(x)	        (SCM_CELL_OBJECT_2 (x))
#define SCM_SMOB_OBJECT_3(x)	        (SCM_CELL_OBJECT_3 (x))
#define SCM_SET_SMOB_OBJECT(x,obj)	(SCM_SET_CELL_OBJECT_1 ((x), (obj)))
#define SCM_SET_SMOB_OBJECT_2(x,obj)    (SCM_SET_CELL_OBJECT_2 ((x), (obj)))
#define SCM_SET_SMOB_OBJECT_3(x,obj)    (SCM_SET_CELL_OBJECT_3 ((x), (obj)))
#define SCM_SMOB_OBJECT_LOC(x)		(SCM_CELL_OBJECT_LOC ((x), 1))
#define SCM_SMOB_OBJECT_2_LOC(x)	(SCM_CELL_OBJECT_LOC ((x), 2))
#define SCM_SMOB_OBJECT_3_LOC(x)	(SCM_CELL_OBJECT_LOC ((x), 3))

#define SCM_TC2SMOBNUM(x)		(0x0ff & ((x) >> 8))
#define SCM_SMOBNUM(x)			(SCM_TC2SMOBNUM (SCM_CELL_TYPE (x)))
/* SCM_SMOBNAME can be 0 if name is missing */
#define SCM_SMOBNAME(smobnum)		(scm_smobs[smobnum].name)
#define SCM_SMOB_PREDICATE(tag, obj)	SCM_TYP16_PREDICATE (tag, obj)
#define SCM_SMOB_DESCRIPTOR(x)		(scm_smobs[SCM_SMOBNUM (x)])
#define SCM_SMOB_APPLICABLE_P(x)	(SCM_SMOB_DESCRIPTOR (x).apply)
#define SCM_SMOB_APPLY_0(x)		(SCM_SMOB_DESCRIPTOR (x).apply_0 (x))
#define SCM_SMOB_APPLY_1(x, a1)		(SCM_SMOB_DESCRIPTOR (x).apply_1 (x, (a1)))
#define SCM_SMOB_APPLY_2(x, a1, a2)	(SCM_SMOB_DESCRIPTOR (x).apply_2 (x, (a1), (a2)))
#define SCM_SMOB_APPLY_3(x, a1, a2, rst)	(SCM_SMOB_DESCRIPTOR (x).apply_3 (x, (a1), (a2), (rst)))

SCM_API long scm_numsmob;
SCM_API scm_smob_descriptor scm_smobs[];

SCM_API void scm_i_set_smob_flags (SCM x, scm_t_bits data);
SCM_API void scm_i_finalize_smob (GC_PTR obj, GC_PTR data);

\f

SCM_API SCM scm_mark0 (SCM ptr);
SCM_API SCM scm_markcdr (SCM ptr);
SCM_API size_t scm_free0 (SCM ptr);
SCM_API size_t scm_smob_free (SCM obj);
SCM_API int scm_smob_print (SCM exp, SCM port, scm_print_state *pstate);

/* The following set of functions is the standard way to create new
 * SMOB types.
 *
 * Create a type tag using `scm_make_smob_type', accept default values
 * for mark, free, print and/or equalp functions, or set your own
 * values using `scm_set_smob_xxx'.
 */

SCM_API scm_t_bits scm_make_smob_type (char const *name, size_t size);

SCM_API void scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM));
SCM_API void scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM));
SCM_API void scm_set_smob_print (scm_t_bits tc,
				 int (*print) (SCM, SCM, scm_print_state*));
SCM_API void scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM));
SCM_API void scm_set_smob_apply (scm_t_bits tc,
				 SCM (*apply) (),
				 unsigned int req,
				 unsigned int opt,
				 unsigned int rst);

SCM_API void scm_assert_smob_type (scm_t_bits tag, SCM val);

/* Function for creating smobs */

SCM_API SCM scm_make_smob (scm_t_bits tc);

SCM_API void scm_smob_prehistory (void);

#endif  /* SCM_SMOB_H */

/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/
Commit	Line	Data
0f2d19dd JB	1	/* classes: h_files */
0f2d19dd JB	2
7a7f7c53 DH	3	#ifndef SCM_SMOB_H
7a7f7c53 DH	4	#define SCM_SMOB_H
dee01b01	5
2b829bbb	6	/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2004, 2006 Free Software Foundation, Inc.
dee01b01	7	*
73be1d9e MV	8	* This library is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License as published by the Free Software Foundation; either
	11	* version 2.1 of the License, or (at your option) any later version.
dee01b01	12	*
73be1d9e	13	* This library is distributed in the hope that it will be useful,
0f2d19dd	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
73be1d9e MV	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
73be1d9e MV	16	* Lesser General Public License for more details.
dee01b01	17	*
73be1d9e MV	18	* You should have received a copy of the GNU Lesser General Public
73be1d9e MV	19	* License along with this library; if not, write to the Free Software
92205699	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
73be1d9e	21	*/
dee01b01	22
0f2d19dd	23	\f
dee01b01	24
b4309c3c	25	#include "libguile/__scm.h"
b08323d1	26	#include "libguile/print.h"
0f2d19dd	27
e7bca227	28	#include "libguile/boehm-gc.h"
10fb3386 LC	29
10fb3386 LC	30
0f2d19dd	31	\f
9dd5943c MD	32	/* This is the internal representation of a smob type */
	33
	34	typedef struct scm_smob_descriptor
	35	{
da0e6c2b	36	char const *name;
1be6b49c	37	size_t size;
7866a09b	38	SCM (*mark) (SCM);
1be6b49c	39	size_t (*free) (SCM);
7866a09b GB	40	int (print) (SCM exp, SCM port, scm_print_state pstate);
7866a09b GB	41	SCM (*equalp) (SCM, SCM);
cb1c46c5 KN	42	SCM (*apply) ();
	43	SCM (*apply_0) (SCM);
	44	SCM (*apply_1) (SCM, SCM);
	45	SCM (*apply_2) (SCM, SCM, SCM);
	46	SCM (*apply_3) (SCM, SCM, SCM, SCM);
68b06924	47	int gsubr_type; /* Used in procprop.c */
9dd5943c MD	48	} scm_smob_descriptor;
9dd5943c MD	49
378f2625	50
0f2d19dd	51	\f
378f2625 LC	52	SCM_API SCM scm_i_new_smob_with_mark_proc (scm_t_bits tc,
	53	scm_t_bits, scm_t_bits, scm_t_bits);
	54
	55
0f2d19dd	56
10fb3386 LC	57	#define SCM_NEWSMOB(z, tc, data) \
	58	do \
	59	{ \
	60	register scm_t_bits _smobnum = SCM_TC2SMOBNUM (tc); \
	61	z = (scm_smobs[_smobnum].mark \
	62	? scm_i_new_smob_with_mark_proc ((tc), (scm_t_bits)(data), \
	63	0, 0) \
	64	: scm_cell (tc, (scm_t_bits)(data))); \
	65	if (scm_smobs[_smobnum].free) \
	66	{ \
	67	GC_finalization_proc _prev_finalizer; \
	68	GC_PTR _prev_finalizer_data; \
	69	\
	70	GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (z), scm_i_finalize_smob, \
	71	NULL, \
	72	&_prev_finalizer, \
	73	&_prev_finalizer_data); \
	74	} \
	75	} \
378f2625	76	while (0)
23a62151	77
378f2625 LC	78	#define SCM_RETURN_NEWSMOB(tc, data) \
	79	do { SCM __SCM_smob_answer; \
	80	SCM_NEWSMOB (__SCM_smob_answer, (tc), (data)); \
	81	return __SCM_smob_answer; \
23a62151 MD	82	} while (0)
23a62151 MD	83
378f2625 LC	84	#define SCM_NEWSMOB2(z, tc, data1, data2) \
378f2625 LC	85	SCM_NEWSMOB3 (z, tc, data1, data2, 0)
87621a14	86
378f2625 LC	87	#define SCM_RETURN_NEWSMOB2(tc, data1, data2) \
	88	do { SCM __SCM_smob_answer; \
	89	SCM_NEWSMOB2 (__SCM_smob_answer, (tc), (data1), (data2)); \
	90	return __SCM_smob_answer; \
87621a14 MD	91	} while (0)
87621a14 MD	92
10fb3386 LC	93	#define SCM_NEWSMOB3(z, tc, data1, data2, data3) \
	94	do \
	95	{ \
	96	register scm_t_bits _smobnum = SCM_TC2SMOBNUM (tc); \
	97	z = (scm_smobs[_smobnum].mark \
	98	? scm_i_new_smob_with_mark_proc (tc, (scm_t_bits)(data1), \
	99	(scm_t_bits)(data2), \
	100	(scm_t_bits)(data3)) \
	101	: scm_double_cell ((tc), (scm_t_bits)(data1), \
	102	(scm_t_bits)(data2), \
	103	(scm_t_bits)(data3))); \
	104	if (scm_smobs[_smobnum].free) \
	105	{ \
	106	GC_finalization_proc _prev_finalizer; \
	107	GC_PTR _prev_finalizer_data; \
	108	\
	109	GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (z), scm_i_finalize_smob, \
	110	NULL, \
	111	&_prev_finalizer, \
	112	&_prev_finalizer_data); \
	113	} \
	114	} \
378f2625	115	while (0)
87621a14	116
378f2625 LC	117	#define SCM_RETURN_NEWSMOB3(tc, data1, data2, data3) \
	118	do { SCM __SCM_smob_answer; \
	119	SCM_NEWSMOB3 (__SCM_smob_answer, (tc), (data1), (data2), (data3)); \
	120	return __SCM_smob_answer; \
87621a14 MD	121	} while (0)
87621a14 MD	122
9dd5943c	123
37fc18ae	124	#define SCM_SMOB_FLAGS(x) (SCM_CELL_WORD_0 (x) >> 16)
94113249	125	#define SCM_SMOB_DATA(x) (SCM_CELL_WORD_1 (x))
37fc18ae MV	126	#define SCM_SMOB_DATA_2(x) (SCM_CELL_WORD_2 (x))
37fc18ae MV	127	#define SCM_SMOB_DATA_3(x) (SCM_CELL_WORD_3 (x))
94113249	128	#define SCM_SET_SMOB_DATA(x, data) (SCM_SET_CELL_WORD_1 ((x), (data)))
37fc18ae MV	129	#define SCM_SET_SMOB_DATA_2(x, data) (SCM_SET_CELL_WORD_2 ((x), (data)))
	130	#define SCM_SET_SMOB_DATA_3(x, data) (SCM_SET_CELL_WORD_3 ((x), (data)))
	131	#define SCM_SET_SMOB_FLAGS(x, data) (scm_i_set_smob_flags((x),(data)<<16))
	132
	133	#define SCM_SMOB_OBJECT(x) (SCM_CELL_OBJECT_1 (x))
	134	#define SCM_SMOB_OBJECT_2(x) (SCM_CELL_OBJECT_2 (x))
	135	#define SCM_SMOB_OBJECT_3(x) (SCM_CELL_OBJECT_3 (x))
	136	#define SCM_SET_SMOB_OBJECT(x,obj) (SCM_SET_CELL_OBJECT_1 ((x), (obj)))
	137	#define SCM_SET_SMOB_OBJECT_2(x,obj) (SCM_SET_CELL_OBJECT_2 ((x), (obj)))
	138	#define SCM_SET_SMOB_OBJECT_3(x,obj) (SCM_SET_CELL_OBJECT_3 ((x), (obj)))
	139	#define SCM_SMOB_OBJECT_LOC(x) (SCM_CELL_OBJECT_LOC ((x), 1))
	140	#define SCM_SMOB_OBJECT_2_LOC(x) (SCM_CELL_OBJECT_LOC ((x), 2))
	141	#define SCM_SMOB_OBJECT_3_LOC(x) (SCM_CELL_OBJECT_LOC ((x), 3))
	142
94113249 DH	143	#define SCM_TC2SMOBNUM(x) (0x0ff & ((x) >> 8))
94113249 DH	144	#define SCM_SMOBNUM(x) (SCM_TC2SMOBNUM (SCM_CELL_TYPE (x)))
2c16a78a	145	/* SCM_SMOBNAME can be 0 if name is missing */
94113249	146	#define SCM_SMOBNAME(smobnum) (scm_smobs[smobnum].name)
e841c3e0	147	#define SCM_SMOB_PREDICATE(tag, obj) SCM_TYP16_PREDICATE (tag, obj)
0717dfd8	148	#define SCM_SMOB_DESCRIPTOR(x) (scm_smobs[SCM_SMOBNUM (x)])
68b06924 KN	149	#define SCM_SMOB_APPLICABLE_P(x) (SCM_SMOB_DESCRIPTOR (x).apply)
68b06924 KN	150	#define SCM_SMOB_APPLY_0(x) (SCM_SMOB_DESCRIPTOR (x).apply_0 (x))
34d19ef6 HWN	151	#define SCM_SMOB_APPLY_1(x, a1) (SCM_SMOB_DESCRIPTOR (x).apply_1 (x, (a1)))
	152	#define SCM_SMOB_APPLY_2(x, a1, a2) (SCM_SMOB_DESCRIPTOR (x).apply_2 (x, (a1), (a2)))
	153	#define SCM_SMOB_APPLY_3(x, a1, a2, rst) (SCM_SMOB_DESCRIPTOR (x).apply_3 (x, (a1), (a2), (rst)))
0f2d19dd	154
33b001fd MV	155	SCM_API long scm_numsmob;
33b001fd MV	156	SCM_API scm_smob_descriptor scm_smobs[];
0f2d19dd	157
37fc18ae	158	SCM_API void scm_i_set_smob_flags (SCM x, scm_t_bits data);
10fb3386	159	SCM_API void scm_i_finalize_smob (GC_PTR obj, GC_PTR data);
37fc18ae	160
0f2d19dd	161	\f
0f2d19dd	162
33b001fd MV	163	SCM_API SCM scm_mark0 (SCM ptr);
	164	SCM_API SCM scm_markcdr (SCM ptr);
	165	SCM_API size_t scm_free0 (SCM ptr);
	166	SCM_API size_t scm_smob_free (SCM obj);
	167	SCM_API int scm_smob_print (SCM exp, SCM port, scm_print_state *pstate);
23a62151	168
c72baaaa MD	169	/* The following set of functions is the standard way to create new
	170	* SMOB types.
	171	*
	172	* Create a type tag using `scm_make_smob_type', accept default values
	173	* for mark, free, print and/or equalp functions, or set your own
	174	* values using `scm_set_smob_xxx'.
	175	*/
23a62151	176
df5af69a	177	SCM_API scm_t_bits scm_make_smob_type (char const *name, size_t size);
23a62151	178
33b001fd MV	179	SCM_API void scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM));
	180	SCM_API void scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM));
	181	SCM_API void scm_set_smob_print (scm_t_bits tc,
	182	int (print) (SCM, SCM, scm_print_state));
	183	SCM_API void scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM));
	184	SCM_API void scm_set_smob_apply (scm_t_bits tc,
	185	SCM (*apply) (),
	186	unsigned int req,
	187	unsigned int opt,
	188	unsigned int rst);
c72baaaa	189
197b0573 MV	190	SCM_API void scm_assert_smob_type (scm_t_bits tag, SCM val);
197b0573 MV	191
7c58e21b	192	/* Function for creating smobs */
c72baaaa	193
33b001fd	194	SCM_API SCM scm_make_smob (scm_t_bits tc);
197b0573	195
33b001fd	196	SCM_API void scm_smob_prehistory (void);
7c58e21b	197
7a7f7c53	198	#endif /* SCM_SMOB_H */
89e00824 ML	199
	200	/*
	201	Local Variables:
	202	c-file-style: "gnu"
	203	End:
	204	*/