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/* 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 */
#include "libguile/__scm.h"
#define SCM_FREEP(x) (SCM_NIMP(x) && SCM_UNPACK_CAR (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_UNPACK_CAR (x) & 5) == 5 \
? SCM_GC8MARKP(x) \
: SCM_GCMARKP(x))
#define SCM_NMARKEDP(x) (!SCM_MARKEDP(x))
extern struct scm_heap_seg_data *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;
typedef struct scm_freelist_t {
/* collected cells */
SCM cells;
#ifdef GUILE_NEW_GC_SCHEME
/* number of cells left to collect before cluster is full */
unsigned int left_to_collect;
/* a list of freelists, each of size gc_trigger,
except the last one which may be shorter */
SCM clusters;
SCM *clustertail;
/* this is the number of cells in each cluster, including the spine cell */
int cluster_size;
/* set to grow the heap when we run out of clusters
*/
int grow_heap_p;
/* minimum number of objects allocated before GC is triggered
*/
int gc_trigger;
/* defines gc_trigger as percent of heap size
* 0 => constant trigger
*/
int gc_trigger_fraction;
#endif
/* number of cells per object on this list */
int span;
/* number of collected cells during last GC */
int collected;
/* total number of cells in heap segments
* belonging to this list.
*/
int heap_size;
} scm_freelist_t;
extern scm_sizet scm_max_segment_size;
extern SCM_CELLPTR scm_heap_org;
#ifdef GUILE_NEW_GC_SCHEME
extern SCM scm_freelist;
extern scm_freelist_t scm_master_freelist;
extern SCM scm_freelist2;
extern scm_freelist_t scm_master_freelist2;
#else
extern scm_freelist_t scm_freelist;
extern scm_freelist_t scm_freelist2;
#endif
extern unsigned long scm_gc_cells_collected;
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;
#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
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 (scm_freelist_t *freelist);
#ifdef GUILE_NEW_GC_SCHEME
extern SCM scm_gc_for_newcell (scm_freelist_t *master, SCM *freelist);
#if 0
extern void scm_alloc_cluster (scm_freelist_t *master);
#endif
#else
extern SCM scm_gc_for_newcell (scm_freelist_t *freelist);
#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);
#ifdef GUILE_NEW_GC_SCHEME
extern int scm_init_storage (scm_sizet init_heap_size, int trig,
scm_sizet init_heap2_size, int trig2,
scm_sizet max_segment_size);
#else
extern int scm_init_storage (scm_sizet init_heap_size,
scm_sizet init_heap2_size);
#endif
extern void scm_init_gc (void);
#endif /* GCH */
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