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

/* classes: h_files */

#ifndef GCH
#define GCH
/* Copyright (C) 1995, 96, 98, 99, 2000 Free Software Foundation, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA
 *
 * As a special exception, the Free Software Foundation gives permission
 * for additional uses of the text contained in its release of GUILE.
 *
 * The exception is that, if you link the GUILE library with other files
 * to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the GUILE library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the
 * Free Software Foundation under the name GUILE.  If you copy
 * code from other Free Software Foundation releases into a copy of
 * GUILE, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for GUILE, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.  */

/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
   gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
\f

#include "libguile/__scm.h"

#include "libguile/hooks.h"

\f

typedef struct scm_cell
{
  scm_bits_t word_0;
  scm_bits_t word_1;
} scm_cell;


/* SCM_CELLPTR is a pointer to a cons cell which may be compared or
 * differenced.
 */
typedef scm_cell * SCM_CELLPTR;


/* Cray machines have pointers that are incremented once for each word,
 * rather than each byte, the 3 most significant bits encode the byte
 * within the word.  The following macros deal with this by storing the
 * native Cray pointers like the ones that looks like scm expects.  This
 * is done for any pointers that might appear in the car of a scm_cell,
 *  pointers to scm_vector elts, functions, &c are not munged.
 */
#ifdef _UNICOS
#  define SCM2PTR(x) ((SCM_CELLPTR) (SCM_UNPACK (x) >> 3))
#  define PTR2SCM(x) (SCM_PACK (((scm_bits_t) (x)) << 3))
#else
#  define SCM2PTR(x) ((SCM_CELLPTR) (SCM_UNPACK (x)))
#  define PTR2SCM(x) (SCM_PACK ((scm_bits_t) (x)))
#endif /* def _UNICOS */


/* Low level cell data accessing macros:
 */

#if SCM_DEBUG_CELL_ACCESSES == 1
#define SCM_VALIDATE_CELL(cell, expr) \
  (!scm_cellp (cell) ? abort (), 0 : (expr))
#else
#define SCM_VALIDATE_CELL(cell, expr) expr
#endif

#define SCM_CELL_WORD(x, n)					\
    SCM_VALIDATE_CELL ((x),					\
		       ((scm_bits_t *) SCM2PTR (x)) [n])
#define SCM_CELL_WORD_0(x) SCM_CELL_WORD (x, 0)
#define SCM_CELL_WORD_1(x) SCM_CELL_WORD (x, 1)
#define SCM_CELL_WORD_2(x) SCM_CELL_WORD (x, 2)
#define SCM_CELL_WORD_3(x) SCM_CELL_WORD (x, 3)

#define SCM_CELL_OBJECT(x, n)						\
    SCM_VALIDATE_CELL ((x),						\
		       SCM_PACK (((scm_bits_t *) SCM2PTR (x)) [n]))
#define SCM_CELL_OBJECT_0(x) SCM_CELL_OBJECT (x, 0)
#define SCM_CELL_OBJECT_1(x) SCM_CELL_OBJECT (x, 1)
#define SCM_CELL_OBJECT_2(x) SCM_CELL_OBJECT (x, 2)
#define SCM_CELL_OBJECT_3(x) SCM_CELL_OBJECT (x, 3)

#define SCM_SET_CELL_WORD(x, n, v)					    \
    SCM_VALIDATE_CELL ((x),						    \
		       ((scm_bits_t *) SCM2PTR (x)) [n] = (scm_bits_t) (v))
#define SCM_SET_CELL_WORD_0(x, v) SCM_SET_CELL_WORD (x, 0, v)
#define SCM_SET_CELL_WORD_1(x, v) SCM_SET_CELL_WORD (x, 1, v)
#define SCM_SET_CELL_WORD_2(x, v) SCM_SET_CELL_WORD (x, 2, v)
#define SCM_SET_CELL_WORD_3(x, v) SCM_SET_CELL_WORD (x, 3, v)

#define SCM_SET_CELL_OBJECT(x, n, v)					  \
    SCM_VALIDATE_CELL ((x),						  \
		       ((scm_bits_t *) SCM2PTR (x)) [n] = SCM_UNPACK (v))
#define SCM_SET_CELL_OBJECT_0(x, v) SCM_SET_CELL_OBJECT (x, 0, v)
#define SCM_SET_CELL_OBJECT_1(x, v) SCM_SET_CELL_OBJECT (x, 1, v)
#define SCM_SET_CELL_OBJECT_2(x, v) SCM_SET_CELL_OBJECT (x, 2, v)
#define SCM_SET_CELL_OBJECT_3(x, v) SCM_SET_CELL_OBJECT (x, 3, v)

#define SCM_CELL_TYPE(x) SCM_CELL_WORD_0 (x)
#define SCM_SET_CELL_TYPE(x, t) SCM_SET_CELL_WORD_0 (x, t)

#define SCM_SETAND_CAR(x, y) \
  (SCM_SETCAR ((x), SCM_PACK (SCM_UNPACK (SCM_CAR (x)) & (y))))
#define SCM_SETAND_CDR(x, y)\
  (SCM_SETCDR ((x), SCM_PACK (SCM_UNPACK (SCM_CDR (x)) & (y))))
#define SCM_SETOR_CAR(x, y)\
  (SCM_SETCAR ((x), SCM_PACK (SCM_UNPACK (SCM_CAR (x)) | (y))))
#define SCM_SETOR_CDR(x, y)\
  (SCM_SETCDR ((x), SCM_PACK (SCM_UNPACK (SCM_CDR (x)) | (y))))

#define SCM_CELL_WORD_LOC(x, n) (&SCM_CELL_WORD (x, n))
#define SCM_CARLOC(x) ((SCM *) (&(((scm_bits_t *) SCM2PTR (x)) [0])))
#define SCM_CDRLOC(x) ((SCM *) (&(((scm_bits_t *) SCM2PTR (x)) [1])))


/* SCM_PTR_LT and friends define how to compare two SCM_CELLPTRs (which may
 * point to cells in different heap segments).
 */
#define SCM_PTR_LT(x, y) ((x) < (y))
#define SCM_PTR_GT(x, y) (SCM_PTR_LT (y, x))
#define SCM_PTR_LE(x, y) (!SCM_PTR_GT (x, y))
#define SCM_PTR_GE(x, y) (!SCM_PTR_LT (x, y))


/* Dirk:FIXME:: */
/* Freelists consist of linked cells where the type entry holds the value
 * scm_tc_free_cell and the second entry holds a pointer to the next cell of
 * the freelist.  Due to this structure, freelist cells are not cons cells
 * and thus may not be accessed using SCM_CAR and SCM_CDR.
 */

/* the allocated thing:  The car of new cells is set to
   scm_tc16_allocated to avoid the fragile state of newcells wrt the
   gc.  If it stays as a freecell, any allocation afterwards could
   cause the cell to go back on the freelist, which will bite you
   sometime afterwards. */

#ifdef GUILE_DEBUG_FREELIST
#define SCM_NEWCELL(_into) do { _into = scm_debug_newcell (); } while (0)
#define SCM_NEWCELL2(_into) do { _into = scm_debug_newcell2 (); } while (0)
#else
/* When we introduce POSIX threads support, every thread will have
   a freelist of its own.  Then it won't any longer be necessary to
   initialize cells with scm_tc16_allocated.  */
#define SCM_NEWCELL(_into) \
        do { \
          if (SCM_IMP (scm_freelist)) \
             _into = scm_gc_for_newcell (&scm_master_freelist, \
                                         &scm_freelist); \
          else \
            { \
               _into = scm_freelist; \
               scm_freelist = SCM_CDR (scm_freelist); \
               SCM_SET_CELL_TYPE (_into, scm_tc16_allocated); \
            } \
        } while(0)
#define SCM_NEWCELL2(_into) \
        do { \
          if (SCM_IMP (scm_freelist2)) \
             _into = scm_gc_for_newcell (&scm_master_freelist2, \
                                         &scm_freelist2); \
          else \
            { \
               _into = scm_freelist2; \
               scm_freelist2 = SCM_CDR (scm_freelist2); \
               SCM_SET_CELL_TYPE (_into, scm_tc16_allocated); \
            } \
        } while(0)
#endif


#define SCM_FREEP(x) (SCM_NIMP (x) && (SCM_CELL_TYPE (x) == scm_tc_free_cell))
#define SCM_NFREEP(x) (!SCM_FREEP (x))

/* 1. This shouldn't be used on immediates.
   2. It thinks that subrs are always unmarked (harmless). */
#define SCM_MARKEDP(x) ((SCM_CELL_TYPE (x) & 5) == 5 \
			? SCM_GC8MARKP (x) \
			: SCM_GCMARKP (x))
#define SCM_NMARKEDP(x) (!SCM_MARKEDP (x))

extern struct scm_heap_seg_data_t *scm_heap_table;
extern int scm_n_heap_segs;
extern int scm_take_stdin;
extern int scm_block_gc;
extern int scm_gc_heap_lock;
\f

extern int scm_default_init_heap_size_1;
extern int scm_default_min_yield_1;
extern int scm_default_init_heap_size_2;
extern int scm_default_min_yield_2;
extern int scm_default_max_segment_size;

extern scm_sizet scm_max_segment_size;
extern SCM_CELLPTR scm_heap_org;
extern SCM scm_freelist;
extern struct scm_freelist_t scm_master_freelist;
extern SCM scm_freelist2;
extern struct scm_freelist_t scm_master_freelist2;
extern unsigned long scm_gc_cells_collected;
extern unsigned long scm_gc_yield;
extern unsigned long scm_gc_malloc_collected;
extern unsigned long scm_gc_ports_collected;
extern unsigned long scm_cells_allocated;
extern long scm_mallocated;
extern unsigned long scm_mtrigger;

extern SCM scm_after_gc_hook;

extern scm_c_hook_t scm_before_gc_c_hook;
extern scm_c_hook_t scm_before_mark_c_hook;
extern scm_c_hook_t scm_before_sweep_c_hook;
extern scm_c_hook_t scm_after_sweep_c_hook;
extern scm_c_hook_t scm_after_gc_c_hook;

#if defined (GUILE_DEBUG) || defined (GUILE_DEBUG_FREELIST)
extern SCM scm_map_free_list (void);
extern SCM scm_free_list_length (void);
#endif
#ifdef GUILE_DEBUG_FREELIST
extern SCM scm_debug_newcell (void);
extern SCM scm_debug_newcell2 (void);
extern SCM scm_gc_set_debug_check_freelist_x (SCM flag);
#endif

\f

extern SCM scm_object_address (SCM obj);
extern SCM scm_unhash_name (SCM name);
extern SCM scm_gc_stats (void);
extern void scm_gc_start (const char *what);
extern void scm_gc_end (void);
extern SCM scm_gc (void);
extern void scm_gc_for_alloc (struct scm_freelist_t *freelist);
extern SCM scm_gc_for_newcell (struct scm_freelist_t *master, SCM *freelist);
#if 0
extern void scm_alloc_cluster (struct scm_freelist_t *master);
#endif
extern void scm_igc (const char *what);
extern void scm_gc_mark (SCM p);
extern void scm_mark_locations (SCM_STACKITEM x[], scm_sizet n);
extern int scm_cellp (SCM value);
extern void scm_gc_sweep (void);
extern void * scm_must_malloc (scm_sizet len, const char *what);
extern void * scm_must_realloc (void *where,
				scm_sizet olen, scm_sizet len,
				const char *what);
extern void scm_done_malloc (long size);
extern void scm_must_free (void *obj);
extern void scm_remember (SCM * ptr);
extern SCM scm_return_first (SCM elt, ...);
extern int scm_return_first_int (int x, ...);
extern SCM scm_permanent_object (SCM obj);
extern SCM scm_protect_object (SCM obj);
extern SCM scm_unprotect_object (SCM obj);
extern int scm_init_storage (scm_sizet init_heap_size, int trig,
                             scm_sizet init_heap2_size, int trig2,
			     scm_sizet max_segment_size);
extern void scm_init_gc (void);
#endif  /* GCH */

/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/
Commit	Line	Data
0f2d19dd JB	1	/* classes: h_files */
	2
	3	#ifndef GCH
	4	#define GCH
16d35552	5	/* Copyright (C) 1995, 96, 98, 99, 2000 Free Software Foundation, Inc.
a00c95d9	6	*
0f2d19dd JB	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2, or (at your option)
	10	* any later version.
a00c95d9	11	*
0f2d19dd JB	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
a00c95d9	16	*
0f2d19dd JB	17	* You should have received a copy of the GNU General Public License
0f2d19dd JB	18	* along with this software; see the file COPYING. If not, write to
82892bed JB	19	* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
82892bed JB	20	* Boston, MA 02111-1307 USA
0f2d19dd JB	21	*
	22	* As a special exception, the Free Software Foundation gives permission
	23	* for additional uses of the text contained in its release of GUILE.
	24	*
	25	* The exception is that, if you link the GUILE library with other files
	26	* to produce an executable, this does not by itself cause the
	27	* resulting executable to be covered by the GNU General Public License.
	28	* Your use of that executable is in no way restricted on account of
	29	* linking the GUILE library code into it.
	30	*
	31	* This exception does not however invalidate any other reasons why
	32	* the executable file might be covered by the GNU General Public License.
	33	*
	34	* This exception applies only to the code released by the
	35	* Free Software Foundation under the name GUILE. If you copy
	36	* code from other Free Software Foundation releases into a copy of
	37	* GUILE, as the General Public License permits, the exception does
	38	* not apply to the code that you add in this way. To avoid misleading
	39	* anyone as to the status of such modified files, you must delete
	40	* this exception notice from them.
	41	*
	42	* If you write modifications of your own for GUILE, it is your choice
	43	* whether to permit this exception to apply to your modifications.
82892bed	44	* If you do not wish that, delete this exception notice. */
d3a6bc94 GB	45
	46	/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
	47	gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
0f2d19dd JB	48	\f
0f2d19dd JB	49
b4309c3c	50	#include "libguile/__scm.h"
2549a709	51
9b3e180c MD	52	#include "libguile/hooks.h"
9b3e180c MD	53
0f2d19dd JB	54	\f
0f2d19dd JB	55
2549a709 DH	56	typedef struct scm_cell
2549a709 DH	57	{
e828cb75 DH	58	scm_bits_t word_0;
e828cb75 DH	59	scm_bits_t word_1;
2549a709 DH	60	} scm_cell;
	61
	62
	63	/* SCM_CELLPTR is a pointer to a cons cell which may be compared or
	64	* differenced.
	65	*/
56100716	66	typedef scm_cell * SCM_CELLPTR;
2549a709 DH	67
	68
	69	/* Cray machines have pointers that are incremented once for each word,
	70	* rather than each byte, the 3 most significant bits encode the byte
	71	* within the word. The following macros deal with this by storing the
	72	* native Cray pointers like the ones that looks like scm expects. This
	73	* is done for any pointers that might appear in the car of a scm_cell,
	74	* pointers to scm_vector elts, functions, &c are not munged.
	75	*/
	76	#ifdef _UNICOS
076d6063 MD	77	# define SCM2PTR(x) ((SCM_CELLPTR) (SCM_UNPACK (x) >> 3))
076d6063 MD	78	# define PTR2SCM(x) (SCM_PACK (((scm_bits_t) (x)) << 3))
2549a709	79	#else
076d6063 MD	80	# define SCM2PTR(x) ((SCM_CELLPTR) (SCM_UNPACK (x)))
076d6063 MD	81	# define PTR2SCM(x) (SCM_PACK ((scm_bits_t) (x)))
2549a709 DH	82	#endif /* def _UNICOS */
	83
	84
	85	/* Low level cell data accessing macros:
	86	*/
	87
708cb87c MD	88	#if SCM_DEBUG_CELL_ACCESSES == 1
	89	#define SCM_VALIDATE_CELL(cell, expr) \
	90	(!scm_cellp (cell) ? abort (), 0 : (expr))
	91	#else
	92	#define SCM_VALIDATE_CELL(cell, expr) expr
	93	#endif
46d53380	94
708cb87c MD	95	#define SCM_CELL_WORD(x, n) \
	96	SCM_VALIDATE_CELL ((x), \
	97	((scm_bits_t *) SCM2PTR (x)) [n])
2549a709 DH	98	#define SCM_CELL_WORD_0(x) SCM_CELL_WORD (x, 0)
	99	#define SCM_CELL_WORD_1(x) SCM_CELL_WORD (x, 1)
	100	#define SCM_CELL_WORD_2(x) SCM_CELL_WORD (x, 2)
	101	#define SCM_CELL_WORD_3(x) SCM_CELL_WORD (x, 3)
	102
708cb87c MD	103	#define SCM_CELL_OBJECT(x, n) \
	104	SCM_VALIDATE_CELL ((x), \
	105	SCM_PACK (((scm_bits_t *) SCM2PTR (x)) [n]))
2549a709 DH	106	#define SCM_CELL_OBJECT_0(x) SCM_CELL_OBJECT (x, 0)
	107	#define SCM_CELL_OBJECT_1(x) SCM_CELL_OBJECT (x, 1)
	108	#define SCM_CELL_OBJECT_2(x) SCM_CELL_OBJECT (x, 2)
	109	#define SCM_CELL_OBJECT_3(x) SCM_CELL_OBJECT (x, 3)
	110
708cb87c MD	111	#define SCM_SET_CELL_WORD(x, n, v) \
	112	SCM_VALIDATE_CELL ((x), \
	113	((scm_bits_t *) SCM2PTR (x)) [n] = (scm_bits_t) (v))
2549a709 DH	114	#define SCM_SET_CELL_WORD_0(x, v) SCM_SET_CELL_WORD (x, 0, v)
	115	#define SCM_SET_CELL_WORD_1(x, v) SCM_SET_CELL_WORD (x, 1, v)
	116	#define SCM_SET_CELL_WORD_2(x, v) SCM_SET_CELL_WORD (x, 2, v)
	117	#define SCM_SET_CELL_WORD_3(x, v) SCM_SET_CELL_WORD (x, 3, v)
	118
708cb87c MD	119	#define SCM_SET_CELL_OBJECT(x, n, v) \
	120	SCM_VALIDATE_CELL ((x), \
	121	((scm_bits_t *) SCM2PTR (x)) [n] = SCM_UNPACK (v))
2549a709 DH	122	#define SCM_SET_CELL_OBJECT_0(x, v) SCM_SET_CELL_OBJECT (x, 0, v)
	123	#define SCM_SET_CELL_OBJECT_1(x, v) SCM_SET_CELL_OBJECT (x, 1, v)
	124	#define SCM_SET_CELL_OBJECT_2(x, v) SCM_SET_CELL_OBJECT (x, 2, v)
	125	#define SCM_SET_CELL_OBJECT_3(x, v) SCM_SET_CELL_OBJECT (x, 3, v)
	126
	127	#define SCM_CELL_TYPE(x) SCM_CELL_WORD_0 (x)
	128	#define SCM_SET_CELL_TYPE(x, t) SCM_SET_CELL_WORD_0 (x, t)
	129
e828cb75 DH	130	#define SCM_SETAND_CAR(x, y) \
e828cb75 DH	131	(SCM_SETCAR ((x), SCM_PACK (SCM_UNPACK (SCM_CAR (x)) & (y))))
2549a709	132	#define SCM_SETAND_CDR(x, y)\
e828cb75	133	(SCM_SETCDR ((x), SCM_PACK (SCM_UNPACK (SCM_CDR (x)) & (y))))
2549a709	134	#define SCM_SETOR_CAR(x, y)\
e828cb75	135	(SCM_SETCAR ((x), SCM_PACK (SCM_UNPACK (SCM_CAR (x)) \| (y))))
2549a709	136	#define SCM_SETOR_CDR(x, y)\
e828cb75	137	(SCM_SETCDR ((x), SCM_PACK (SCM_UNPACK (SCM_CDR (x)) \| (y))))
2549a709 DH	138
2549a709 DH	139	#define SCM_CELL_WORD_LOC(x, n) (&SCM_CELL_WORD (x, n))
4b479d98 DH	140	#define SCM_CARLOC(x) ((SCM ) (&(((scm_bits_t ) SCM2PTR (x)) [0])))
4b479d98 DH	141	#define SCM_CDRLOC(x) ((SCM ) (&(((scm_bits_t ) SCM2PTR (x)) [1])))
2549a709 DH	142
2549a709 DH	143
6ba93e5e DH	144	/* SCM_PTR_LT and friends define how to compare two SCM_CELLPTRs (which may
6ba93e5e DH	145	* point to cells in different heap segments).
2549a709	146	*/
6ba93e5e DH	147	#define SCM_PTR_LT(x, y) ((x) < (y))
6ba93e5e DH	148	#define SCM_PTR_GT(x, y) (SCM_PTR_LT (y, x))
2549a709 DH	149	#define SCM_PTR_LE(x, y) (!SCM_PTR_GT (x, y))
	150	#define SCM_PTR_GE(x, y) (!SCM_PTR_LT (x, y))
	151
	152
2d67e390 DH	153	/* Dirk:FIXME:: */
	154	/* Freelists consist of linked cells where the type entry holds the value
	155	* scm_tc_free_cell and the second entry holds a pointer to the next cell of
	156	* the freelist. Due to this structure, freelist cells are not cons cells
	157	* and thus may not be accessed using SCM_CAR and SCM_CDR.
	158	*/
	159
	160	/* the allocated thing: The car of new cells is set to
2549a709	161	scm_tc16_allocated to avoid the fragile state of newcells wrt the
2d67e390	162	gc. If it stays as a freecell, any allocation afterwards could
2549a709	163	cause the cell to go back on the freelist, which will bite you
2d67e390	164	sometime afterwards. */
2549a709 DH	165
	166	#ifdef GUILE_DEBUG_FREELIST
	167	#define SCM_NEWCELL(_into) do { _into = scm_debug_newcell (); } while (0)
	168	#define SCM_NEWCELL2(_into) do { _into = scm_debug_newcell2 (); } while (0)
	169	#else
2549a709 DH	170	/* When we introduce POSIX threads support, every thread will have
	171	a freelist of its own. Then it won't any longer be necessary to
	172	initialize cells with scm_tc16_allocated. */
	173	#define SCM_NEWCELL(_into) \
	174	do { \
	175	if (SCM_IMP (scm_freelist)) \
	176	_into = scm_gc_for_newcell (&scm_master_freelist, \
	177	&scm_freelist); \
	178	else \
	179	{ \
	180	_into = scm_freelist; \
2d67e390 DH	181	scm_freelist = SCM_CDR (scm_freelist); \
2d67e390 DH	182	SCM_SET_CELL_TYPE (_into, scm_tc16_allocated); \
2549a709 DH	183	} \
	184	} while(0)
	185	#define SCM_NEWCELL2(_into) \
	186	do { \
	187	if (SCM_IMP (scm_freelist2)) \
	188	_into = scm_gc_for_newcell (&scm_master_freelist2, \
	189	&scm_freelist2); \
	190	else \
	191	{ \
	192	_into = scm_freelist2; \
2d67e390 DH	193	scm_freelist2 = SCM_CDR (scm_freelist2); \
2d67e390 DH	194	SCM_SET_CELL_TYPE (_into, scm_tc16_allocated); \
2549a709 DH	195	} \
2549a709 DH	196	} while(0)
2549a709 DH	197	#endif
	198
	199
2d67e390 DH	200	#define SCM_FREEP(x) (SCM_NIMP (x) && (SCM_CELL_TYPE (x) == scm_tc_free_cell))
2d67e390 DH	201	#define SCM_NFREEP(x) (!SCM_FREEP (x))
0f2d19dd	202
79e3f9e2 MD	203	/* 1. This shouldn't be used on immediates.
79e3f9e2 MD	204	2. It thinks that subrs are always unmarked (harmless). */
2d67e390 DH	205	#define SCM_MARKEDP(x) ((SCM_CELL_TYPE (x) & 5) == 5 \
	206	? SCM_GC8MARKP (x) \
	207	: SCM_GCMARKP (x))
	208	#define SCM_NMARKEDP(x) (!SCM_MARKEDP (x))
79e3f9e2	209
a00c95d9	210	extern struct scm_heap_seg_data_t *scm_heap_table;
0f2d19dd JB	211	extern int scm_n_heap_segs;
	212	extern int scm_take_stdin;
	213	extern int scm_block_gc;
	214	extern int scm_gc_heap_lock;
	215	\f
	216
aeacfc8f MD	217	extern int scm_default_init_heap_size_1;
	218	extern int scm_default_min_yield_1;
	219	extern int scm_default_init_heap_size_2;
	220	extern int scm_default_min_yield_2;
	221	extern int scm_default_max_segment_size;
	222
4c48ba06	223	extern scm_sizet scm_max_segment_size;
0f2d19dd	224	extern SCM_CELLPTR scm_heap_org;
4a4c9785	225	extern SCM scm_freelist;
a00c95d9	226	extern struct scm_freelist_t scm_master_freelist;
4a4c9785	227	extern SCM scm_freelist2;
a00c95d9	228	extern struct scm_freelist_t scm_master_freelist2;
0f2d19dd	229	extern unsigned long scm_gc_cells_collected;
8b0d194f	230	extern unsigned long scm_gc_yield;
0f2d19dd JB	231	extern unsigned long scm_gc_malloc_collected;
	232	extern unsigned long scm_gc_ports_collected;
	233	extern unsigned long scm_cells_allocated;
a5c314c8	234	extern long scm_mallocated;
15e9d186	235	extern unsigned long scm_mtrigger;
0f2d19dd	236
9b3e180c MD	237	extern SCM scm_after_gc_hook;
	238
	239	extern scm_c_hook_t scm_before_gc_c_hook;
	240	extern scm_c_hook_t scm_before_mark_c_hook;
	241	extern scm_c_hook_t scm_before_sweep_c_hook;
	242	extern scm_c_hook_t scm_after_sweep_c_hook;
	243	extern scm_c_hook_t scm_after_gc_c_hook;
	244
bb2c57fa	245	#if defined (GUILE_DEBUG) \|\| defined (GUILE_DEBUG_FREELIST)
25748c78	246	extern SCM scm_map_free_list (void);
5384bc5b	247	extern SCM scm_free_list_length (void);
bb2c57fa MD	248	#endif
bb2c57fa MD	249	#ifdef GUILE_DEBUG_FREELIST
f2333166	250	extern SCM scm_debug_newcell (void);
16d35552	251	extern SCM scm_debug_newcell2 (void);
25748c78	252	extern SCM scm_gc_set_debug_check_freelist_x (SCM flag);
88256b2e JB	253	#endif
88256b2e JB	254
0f2d19dd	255	\f
0f2d19dd	256
8163d1e4	257	extern SCM scm_object_address (SCM obj);
fe1a46f0 JB	258	extern SCM scm_unhash_name (SCM name);
fe1a46f0 JB	259	extern SCM scm_gc_stats (void);
3eeba8d4	260	extern void scm_gc_start (const char *what);
fe1a46f0 JB	261	extern void scm_gc_end (void);
fe1a46f0 JB	262	extern SCM scm_gc (void);
a00c95d9	263	extern void scm_gc_for_alloc (struct scm_freelist_t *freelist);
a00c95d9	264	extern SCM scm_gc_for_newcell (struct scm_freelist_t master, SCM freelist);
4c48ba06	265	#if 0
a00c95d9	266	extern void scm_alloc_cluster (struct scm_freelist_t *master);
4c48ba06	267	#endif
3eeba8d4	268	extern void scm_igc (const char *what);
fe1a46f0 JB	269	extern void scm_gc_mark (SCM p);
	270	extern void scm_mark_locations (SCM_STACKITEM x[], scm_sizet n);
	271	extern int scm_cellp (SCM value);
	272	extern void scm_gc_sweep (void);
07806695 JB	273	extern void * scm_must_malloc (scm_sizet len, const char *what);
07806695 JB	274	extern void * scm_must_realloc (void *where,
fe1a46f0	275	scm_sizet olen, scm_sizet len,
3eeba8d4	276	const char *what);
fe1a46f0	277	extern void scm_done_malloc (long size);
07806695	278	extern void scm_must_free (void *obj);
fe1a46f0 JB	279	extern void scm_remember (SCM * ptr);
fe1a46f0 JB	280	extern SCM scm_return_first (SCM elt, ...);
41b0806d	281	extern int scm_return_first_int (int x, ...);
fe1a46f0 JB	282	extern SCM scm_permanent_object (SCM obj);
	283	extern SCM scm_protect_object (SCM obj);
	284	extern SCM scm_unprotect_object (SCM obj);
dd45c0df	285	extern int scm_init_storage (scm_sizet init_heap_size, int trig,
4c48ba06 MD	286	scm_sizet init_heap2_size, int trig2,
4c48ba06 MD	287	scm_sizet max_segment_size);
fe1a46f0	288	extern void scm_init_gc (void);
0f2d19dd	289	#endif /* GCH */
89e00824 ML	290
	291	/*
	292	Local Variables:
	293	c-file-style: "gnu"
	294	End:
	295	*/