-/* 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 */
-
-#define SCM_GC_CARD_N_HEADER_CELLS 1
-#define SCM_GC_CARD_N_CELLS 256
-
-#define SCM_GC_CARD_SIZE (SCM_GC_CARD_N_CELLS * sizeof (scm_cell))
-#define SCM_GC_CARD_N_DATA_CELLS (SCM_GC_CARD_N_CELLS - SCM_GC_CARD_N_HEADER_CELLS)
-
-#define SCM_GC_CARD_BVEC_SIZE_IN_LIMBS \
- ((SCM_GC_CARD_N_CELLS + SCM_C_BVEC_LIMB_BITS - 1) / SCM_C_BVEC_LIMB_BITS)
-
-#define SCM_GC_IN_CARD_HEADERP(x) \
- SCM_PTR_LT ((scm_cell *) (x), SCM_GC_CELL_CARD (x) + SCM_GC_CARD_N_HEADER_CELLS)
-
-#define SCM_GC_CARD_BVEC(card) ((scm_c_bvec_limb_t *) ((card)->word_0))
-
-#define SCM_GC_GET_CARD_FLAGS(card) ((long) ((card)->word_1))
-#define SCM_GC_SET_CARD_FLAGS(card, flags) (SCM_GC_GET_CARD_FLAGS (card) = (flags))
-#define SCM_GC_CLR_CARD_FLAGS(card) (SCM_GC_GET_CARD_FLAGS (card) = 0L)
-
-#define SCM_GC_GET_CARD_FLAG(card, shift) (SCM_GC_GET_CARD_FLAGS (card) & (1L << (shift)))
-#define SCM_GC_SET_CARD_FLAG(card, shift) (SCM_GC_GET_CARD_FLAGS (card) |= (1L << (shift)))
-#define SCM_GC_CLR_CARD_FLAG(card, shift) (SCM_GC_GET_CARD_FLAGS (card) &= ~(1L << (shift)))
-
-#define SCM_GC_CARDF_DOUBLECELL 0
-
-#define SCM_GC_CARD_DOUBLECELLP(card) SCM_GC_GET_CARD_FLAG (card, SCM_GC_CARDF_DOUBLECELL)
-#define SCM_GC_SET_CARD_DOUBLECELL(card) SCM_GC_SET_CARD_FLAG (card, SCM_GC_CARDF_DOUBLECELL)
-
-/* card addressing. for efficiency, cards are *always* aligned to
- SCM_GC_CARD_SIZE. */
-
-#define SCM_GC_CARD_SIZE_MASK (SCM_GC_CARD_SIZE - 1)
-#define SCM_GC_CARD_ADDR_MASK (~SCM_GC_CARD_SIZE_MASK)
-
-#define SCM_GC_CELL_CARD(x) ((SCM_CELLPTR) ((long) (x) & SCM_GC_CARD_ADDR_MASK))
-#define SCM_GC_CELL_SPAN(x) ((SCM_GC_CARD_DOUBLECELLP (SCM_GC_CELL_CARD (x))) ? 2 : 1)
-#define SCM_GC_CELL_OFFSET(x) (((long) (x) & SCM_GC_CARD_SIZE_MASK) >> SCM_CELL_SIZE_SHIFT)
-#define SCM_GC_CELL_BVEC(x) SCM_GC_CARD_BVEC (SCM_GC_CELL_CARD (x))
-#define SCM_GC_CELL_GET_BIT(x) SCM_C_BVEC_GET (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x))
-#define SCM_GC_CELL_SET_BIT(x) SCM_C_BVEC_SET (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x))
-#define SCM_GC_CELL_CLR_BIT(x) SCM_C_BVEC_CLR (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x))
-
-#define SCM_GC_CARD_UP(x) SCM_GC_CELL_CARD ((char *) (x) + SCM_GC_CARD_SIZE - 1)
-#define SCM_GC_CARD_DOWN SCM_GC_CELL_CARD
-
-/* low level bit banging aids */
-
-typedef unsigned long scm_c_bvec_limb_t;
-
-#if (SIZEOF_LONG == 8)
-# define SCM_C_BVEC_LIMB_BITS 64
-# define SCM_C_BVEC_OFFSET_SHIFT 6
-# define SCM_C_BVEC_POS_MASK 63
-# define SCM_CELL_SIZE_SHIFT 4
-#else
-# define SCM_C_BVEC_LIMB_BITS 32
-# define SCM_C_BVEC_OFFSET_SHIFT 5
-# define SCM_C_BVEC_POS_MASK 31
-# define SCM_CELL_SIZE_SHIFT 3
-#endif
-
-#define SCM_C_BVEC_OFFSET(pos) (pos >> SCM_C_BVEC_OFFSET_SHIFT)
-
-#define SCM_C_BVEC_GET(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] & (1L << (pos & SCM_C_BVEC_POS_MASK)))
-#define SCM_C_BVEC_SET(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] |= (1L << (pos & SCM_C_BVEC_POS_MASK)))
-#define SCM_C_BVEC_CLR(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] &= ~(1L << (pos & SCM_C_BVEC_POS_MASK)))
-
-#define SCM_C_BVEC_BITS2BYTES(bits) \
- (sizeof (scm_c_bvec_limb_t) * ((((bits) & SCM_C_BVEC_POS_MASK) ? 1L : 0L) + SCM_C_BVEC_OFFSET (bits)))
-
-#define SCM_C_BVEC_SET_BYTES(bvec, bytes) (memset (bvec, 0xff, bytes))
-#define SCM_C_BVEC_SET_ALL_BITS(bvec, bits) SCM_C_BVEC_SET_BYTES (bvec, SCM_C_BVEC_BITS2BYTES (bits))
-
-#define SCM_C_BVEC_CLR_BYTES(bvec, bytes) (memset (bvec, 0, bytes))
-#define SCM_C_BVEC_CLR_ALL_BITS(bvec, bits) SCM_C_BVEC_CLR_BYTES (bvec, SCM_C_BVEC_BITS2BYTES (bits))
-
-/* testing and changing GC marks */
-
-#define SCM_GCMARKP(x) SCM_GC_CELL_GET_BIT (x)
-#define SCM_SETGCMARK(x) SCM_GC_CELL_SET_BIT (x)
-#define SCM_CLRGCMARK(x) SCM_GC_CELL_CLR_BIT (x)
-
-/* Low level cell data accessing macros:
- */
-
-#if (SCM_DEBUG_CELL_ACCESSES == 1)
-# define SCM_VALIDATE_CELL(cell, expr) (scm_assert_cell_valid (cell), (expr))
-#else
-# define SCM_VALIDATE_CELL(cell, expr) expr
-#endif
-
-#define SCM_CELL_WORD(x, n) \
- SCM_VALIDATE_CELL ((x), ((const 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 (((const 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_bits_t *) & SCM_CELL_WORD (x, n))
-#define SCM_CARLOC(x) ((SCM *) SCM_CELL_WORD_LOC ((x), 0))
-#define SCM_CDRLOC(x) ((SCM *) SCM_CELL_WORD_LOC ((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))
-
-
-/* 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.
- */
-
-#define SCM_FREE_CELL_P(x) \
- (!SCM_IMP (x) && (* (const scm_bits_t *) SCM2PTR (x) == scm_tc_free_cell))
-#define SCM_FREE_CELL_CDR(x) \
- (SCM_PACK (((const scm_bits_t *) SCM2PTR (x)) [1]))
-#define SCM_SET_FREE_CELL_TYPE(x, v) \
- (((scm_bits_t *) SCM2PTR (x)) [0] = (v))
-#define SCM_SET_FREE_CELL_CDR(x, v) \
- (((scm_bits_t *) SCM2PTR (x)) [1] = SCM_UNPACK (v))
-
-#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. */
-#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_FREE_CELL_CDR (scm_freelist); \
- } \
- } 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_FREE_CELL_CDR (scm_freelist2); \
- } \
- } while(0)
-#endif
-
-
-#define SCM_MARKEDP SCM_GCMARKP
-#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_block_gc;
-extern int scm_gc_heap_lock;
-extern unsigned int scm_gc_running_p;
-\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 (SCM_DEBUG_CELL_ACCESSES == 1)
-extern void scm_assert_cell_valid (SCM);
-extern unsigned int scm_debug_cell_accesses_p;
-extern SCM scm_set_debug_cell_accesses_x (SCM flag);
-#endif
-
-#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 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_gc_mark_dependencies (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_done_free (long size);
-extern void scm_must_free (void *obj);
-extern void scm_remember_upto_here_1 (SCM obj);
-extern void scm_remember_upto_here_2 (SCM obj1, SCM obj2);
-extern void scm_remember_upto_here (SCM obj1, ...);
-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 (void);
-extern void *scm_get_stack_base (void);
-extern void scm_init_gc (void);
-
-\f
-
-#if (SCM_DEBUG_DEPRECATED == 0)
-
-#define SCM_FREEP(x) (SCM_FREE_CELL_P (x))
-#define SCM_NFREEP(x) (!SCM_FREE_CELL_P (x))
-#define SCM_GC8MARKP(x) SCM_GCMARKP (x)
-#define SCM_SETGC8MARK(x) SCM_SETGCMARK (x)
-#define SCM_CLRGC8MARK(x) SCM_CLRGCMARK (x)
-#define SCM_GCTYP16(x) SCM_TYP16 (x)
-#define SCM_GCCDR(x) SCM_CDR (x)
-extern void scm_remember (SCM * ptr);
-
-#endif /* SCM_DEBUG_DEPRECATED == 0 */
-
-#endif /* GCH */
-
-/*
- Local Variables:
- c-file-style: "gnu"
- End:
-*/
+/* classes: h_files */
+
+#ifndef SCM_GC_H
+#define SCM_GC_H
+
+/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2002, 2003, 2004 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+\f
+
+#include "libguile/__scm.h"
+
+#include "libguile/hooks.h"
+
+#if SCM_USE_PTHREAD_THREADS
+# include "libguile/pthread-threads.h"
+#else
+# include "libguile/null-threads.h"
+#endif
+
+\f
+
+typedef struct scm_t_cell
+{
+ SCM word_0;
+ SCM word_1;
+} scm_t_cell;
+
+/*
+ CARDS
+
+ A card is a small `page' of memory; it will be the unit for lazy
+ sweeping, generations, etc. The first cell of a card contains a
+ pointer to the mark bitvector, so that we can find the bitvector
+ efficiently: we knock off some lowerorder bits.
+
+ The size on a 32 bit machine is 256 cells = 2kb. The card [XXX]
+*/
+
+
+
+/* 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 point to a cell,
+ * pointers to scm_vector elts, functions, &c are not munged.
+ */
+#ifdef _UNICOS
+# define SCM2PTR(x) ((scm_t_cell *) (SCM_UNPACK (x) >> 3))
+# define PTR2SCM(x) (SCM_PACK (((scm_t_bits) (x)) << 3))
+#else
+# define SCM2PTR(x) ((scm_t_cell *) (SCM_UNPACK (x)))
+# define PTR2SCM(x) (SCM_PACK ((scm_t_bits) (x)))
+#endif /* def _UNICOS */
+
+
+#define SCM_GC_CARD_N_HEADER_CELLS 1
+#define SCM_GC_CARD_N_CELLS 256
+#define SCM_GC_SIZEOF_CARD SCM_GC_CARD_N_CELLS * sizeof (scm_t_cell)
+
+#define SCM_GC_CARD_BVEC(card) ((scm_t_c_bvec_long *) ((card)->word_0))
+#define SCM_GC_SET_CARD_BVEC(card, bvec) \
+ ((card)->word_0 = (SCM) (bvec))
+#define SCM_GC_GET_CARD_FLAGS(card) ((long) ((card)->word_1))
+#define SCM_GC_SET_CARD_FLAGS(card, flags) \
+ ((card)->word_1 = (SCM) (flags))
+
+#define SCM_GC_GET_CARD_FLAG(card, shift) \
+ (SCM_GC_GET_CARD_FLAGS (card) & (1L << (shift)))
+#define SCM_GC_SET_CARD_FLAG(card, shift) \
+ (SCM_GC_SET_CARD_FLAGS (card, SCM_GC_GET_CARD_FLAGS(card) | (1L << (shift))))
+#define SCM_GC_CLEAR_CARD_FLAG(card, shift) \
+ (SCM_GC_SET_CARD_FLAGS (card, SCM_GC_GET_CARD_FLAGS(card) & ~(1L << (shift))))
+
+/*
+ Remove card flags. They hamper lazy initialization, and aren't used
+ anyways.
+ */
+
+/* card addressing. for efficiency, cards are *always* aligned to
+ SCM_GC_CARD_SIZE. */
+
+#define SCM_GC_CARD_SIZE_MASK (SCM_GC_SIZEOF_CARD-1)
+#define SCM_GC_CARD_ADDR_MASK (~SCM_GC_CARD_SIZE_MASK)
+
+#define SCM_GC_CELL_CARD(x) ((scm_t_cell *) ((long) (x) & SCM_GC_CARD_ADDR_MASK))
+#define SCM_GC_CELL_OFFSET(x) (((long) (x) & SCM_GC_CARD_SIZE_MASK) >> SCM_CELL_SIZE_SHIFT)
+#define SCM_GC_CELL_BVEC(x) SCM_GC_CARD_BVEC (SCM_GC_CELL_CARD (x))
+#define SCM_GC_SET_CELL_BVEC(x, bvec) SCM_GC_SET_CARD_BVEC (SCM_GC_CELL_CARD (x), bvec)
+#define SCM_GC_CELL_GET_BIT(x) SCM_C_BVEC_GET (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x))
+#define SCM_GC_CELL_SET_BIT(x) SCM_C_BVEC_SET (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x))
+#define SCM_GC_CELL_CLEAR_BIT(x) SCM_C_BVEC_CLEAR (SCM_GC_CELL_BVEC (x), SCM_GC_CELL_OFFSET (x))
+
+#define SCM_GC_CARD_UP(x) SCM_GC_CELL_CARD ((char *) (x) + SCM_GC_SIZEOF_CARD - 1)
+#define SCM_GC_CARD_DOWN SCM_GC_CELL_CARD
+
+/* low level bit banging aids */
+typedef unsigned long scm_t_c_bvec_long;
+
+#if (SCM_SIZEOF_UNSIGNED_LONG == 8)
+# define SCM_C_BVEC_LONG_BITS 64
+# define SCM_C_BVEC_OFFSET_SHIFT 6
+# define SCM_C_BVEC_POS_MASK 63
+# define SCM_CELL_SIZE_SHIFT 4
+#else
+# define SCM_C_BVEC_LONG_BITS 32
+# define SCM_C_BVEC_OFFSET_SHIFT 5
+# define SCM_C_BVEC_POS_MASK 31
+# define SCM_CELL_SIZE_SHIFT 3
+#endif
+
+#define SCM_C_BVEC_OFFSET(pos) (pos >> SCM_C_BVEC_OFFSET_SHIFT)
+
+#define SCM_C_BVEC_GET(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] & (1L << (pos & SCM_C_BVEC_POS_MASK)))
+#define SCM_C_BVEC_SET(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] |= (1L << (pos & SCM_C_BVEC_POS_MASK)))
+#define SCM_C_BVEC_CLEAR(bvec, pos) (bvec[SCM_C_BVEC_OFFSET (pos)] &= ~(1L << (pos & SCM_C_BVEC_POS_MASK)))
+
+/* testing and changing GC marks */
+#define SCM_GC_MARK_P(x) SCM_GC_CELL_GET_BIT (x)
+#define SCM_SET_GC_MARK(x) SCM_GC_CELL_SET_BIT (x)
+#define SCM_CLEAR_GC_MARK(x) SCM_GC_CELL_CLEAR_BIT (x)
+
+/* Low level cell data accessing macros. These macros should only be used
+ * from within code related to garbage collection issues, since they will
+ * never check the cells they are applied to - not even if guile is compiled
+ * in debug mode. In particular these macros will even work for free cells,
+ * which should never be encountered by user code. */
+
+#define SCM_GC_CELL_OBJECT(x, n) (((SCM *)SCM2PTR (x)) [n])
+#define SCM_GC_CELL_WORD(x, n) (SCM_UNPACK (SCM_GC_CELL_OBJECT ((x), (n))))
+
+#define SCM_GC_SET_CELL_OBJECT(x, n, v) ((((SCM *)SCM2PTR (x)) [n]) = (v))
+#define SCM_GC_SET_CELL_WORD(x, n, v) \
+ (SCM_GC_SET_CELL_OBJECT ((x), (n), SCM_PACK (v)))
+
+#define SCM_GC_CELL_TYPE(x) (SCM_GC_CELL_OBJECT ((x), 0))
+
+
+/* Except for the garbage collector, no part of guile should ever run over a
+ * free cell. Thus, if guile is compiled in debug mode the SCM_CELL_* and
+ * SCM_SET_CELL_* macros below report an error if they are applied to a free
+ * cell. Some other plausibility checks are also performed. However, if
+ * guile is not compiled in debug mode, there won't be any time penalty at all
+ * when using these macros. */
+
+#if (SCM_DEBUG_CELL_ACCESSES == 1)
+# define SCM_VALIDATE_CELL(cell, expr) (scm_assert_cell_valid (cell), (expr))
+#else
+# define SCM_VALIDATE_CELL(cell, expr) (expr)
+#endif
+
+#define SCM_CELL_WORD(x, n) \
+ SCM_VALIDATE_CELL ((x), SCM_GC_CELL_WORD ((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_GC_CELL_OBJECT ((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_GC_SET_CELL_WORD ((x), (n), (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_GC_SET_CELL_OBJECT ((x), (n), (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))
+
+/* 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. */
+
+/*
+ SCM_FREECELL_P removed ; the semantics are ambiguous with lazy
+ sweeping. Could mean "this cell is no longer in use (will be swept)"
+ or "this cell has just been swept, and is not yet in use".
+ */
+
+#define SCM_FREECELL_P this_macro_has_been_removed_see_gc_header_file
+
+#define SCM_FREE_CELL_CDR(x) \
+ (SCM_GC_CELL_OBJECT ((x), 1))
+#define SCM_SET_FREE_CELL_CDR(x, v) \
+ (SCM_GC_SET_CELL_OBJECT ((x), 1, (v)))
+
+
+#define SCM_CELL_OBJECT_LOC(x, n) (SCM_VALIDATE_CELL((x), &SCM_GC_CELL_OBJECT ((x), (n))))
+#define SCM_CARLOC(x) (SCM_CELL_OBJECT_LOC ((x), 0))
+#define SCM_CDRLOC(x) (SCM_CELL_OBJECT_LOC ((x), 1))
+
+
+
+
+#if (SCM_DEBUG_CELL_ACCESSES == 1)
+/* Set this to != 0 if every cell that is accessed shall be checked:
+ */
+SCM_API int scm_debug_cell_accesses_p;
+SCM_API int scm_expensive_debug_cell_accesses_p;
+SCM_API int scm_debug_cells_gc_interval ;
+void scm_i_expensive_validation_check (SCM cell);
+#endif
+
+SCM_API scm_t_mutex scm_i_gc_admin_mutex;
+
+SCM_API int scm_block_gc;
+SCM_API int scm_gc_heap_lock;
+SCM_API unsigned int scm_gc_running_p;
+SCM_API scm_t_rec_mutex scm_i_sweep_mutex;
+\f
+
+#if (SCM_ENABLE_DEPRECATED == 1)
+SCM_API size_t scm_default_init_heap_size_1;
+SCM_API int scm_default_min_yield_1;
+SCM_API size_t scm_default_init_heap_size_2;
+SCM_API int scm_default_min_yield_2;
+SCM_API size_t scm_default_max_segment_size;
+#else
+#define scm_default_init_heap_size_1 deprecated
+#define scm_default_min_yield_1 deprecated
+#define scm_default_init_heap_size_2 deprecated
+#define scm_default_min_yield_2 deprecated
+#define scm_default_max_segment_size deprecated
+#endif
+
+
+SCM_API size_t scm_max_segment_size;
+
+#define SCM_FREELIST_CREATE(key) \
+ do { SCM *ls = (SCM *) malloc (sizeof (SCM)); \
+ *ls = SCM_EOL; \
+ scm_setspecific ((key), ls); } while (0)
+#define SCM_FREELIST_LOC(key) ((SCM *) scm_getspecific (key))
+SCM_API scm_t_key scm_i_freelist;
+SCM_API scm_t_key scm_i_freelist2;
+SCM_API struct scm_t_cell_type_statistics scm_i_master_freelist;
+SCM_API struct scm_t_cell_type_statistics scm_i_master_freelist2;
+
+
+SCM_API unsigned long scm_gc_cells_swept;
+SCM_API unsigned long scm_gc_cells_collected;
+SCM_API unsigned long scm_gc_malloc_collected;
+SCM_API unsigned long scm_gc_ports_collected;
+SCM_API unsigned long scm_cells_allocated;
+SCM_API int scm_gc_cell_yield_percentage;
+SCM_API int scm_gc_malloc_yield_percentage;
+SCM_API unsigned long scm_mallocated;
+SCM_API unsigned long scm_mtrigger;
+
+
+
+SCM_API SCM scm_after_gc_hook;
+
+SCM_API scm_t_c_hook scm_before_gc_c_hook;
+SCM_API scm_t_c_hook scm_before_mark_c_hook;
+SCM_API scm_t_c_hook scm_before_sweep_c_hook;
+SCM_API scm_t_c_hook scm_after_sweep_c_hook;
+SCM_API scm_t_c_hook scm_after_gc_c_hook;
+
+#if defined (GUILE_DEBUG) || defined (GUILE_DEBUG_FREELIST)
+#if (SCM_ENABLE_DEPRECATED == 1)
+SCM scm_map_free_list (void);
+#else
+#define scm_map_free_list deprecated
+#define scm_free_list_length deprecated
+#endif
+#endif
+
+#if (SCM_ENABLE_DEPRECATED == 1) && defined (GUILE_DEBUG_FREELIST)
+SCM_API SCM scm_gc_set_debug_check_freelist_x (SCM flag);
+#endif
+\f
+
+#if (SCM_DEBUG_CELL_ACCESSES == 1)
+SCM_API void scm_assert_cell_valid (SCM);
+#endif
+
+SCM_API SCM scm_set_debug_cell_accesses_x (SCM flag);
+
+
+SCM_API SCM scm_object_address (SCM obj);
+SCM_API SCM scm_gc_stats (void);
+SCM_API SCM scm_gc_live_object_stats (void);
+SCM_API SCM scm_gc_tag_name (SCM tag);
+SCM_API SCM scm_gc (void);
+SCM_API void scm_gc_for_alloc (struct scm_t_cell_type_statistics *freelist);
+SCM_API SCM scm_gc_for_newcell (struct scm_t_cell_type_statistics *master, SCM *freelist);
+SCM_API void scm_igc (const char *what);
+SCM_API void scm_gc_mark (SCM p);
+SCM_API void scm_gc_mark_dependencies (SCM p);
+SCM_API void scm_mark_locations (SCM_STACKITEM x[], unsigned long n);
+SCM_API int scm_in_heap_p (SCM value);
+SCM_API void scm_gc_sweep (void);
+
+SCM_API void *scm_malloc (size_t size);
+SCM_API void *scm_calloc (size_t size);
+SCM_API void *scm_realloc (void *mem, size_t size);
+SCM_API char *scm_strdup (const char *str);
+SCM_API char *scm_strndup (const char *str, size_t n);
+SCM_API void scm_gc_register_collectable_memory (void *mem, size_t size,
+ const char *what);
+SCM_API void scm_gc_unregister_collectable_memory (void *mem, size_t size,
+ const char *what);
+SCM_API void *scm_gc_calloc (size_t size, const char *what);
+SCM_API void *scm_gc_malloc (size_t size, const char *what);
+SCM_API void *scm_gc_realloc (void *mem, size_t old_size,
+ size_t new_size, const char *what);
+SCM_API void scm_gc_free (void *mem, size_t size, const char *what);
+SCM_API char *scm_gc_strdup (const char *str, const char *what);
+SCM_API char *scm_gc_strndup (const char *str, size_t n, const char *what);
+
+SCM_API void scm_remember_upto_here_1 (SCM obj);
+SCM_API void scm_remember_upto_here_2 (SCM obj1, SCM obj2);
+SCM_API void scm_remember_upto_here (SCM obj1, ...);
+
+/* In GCC we can force a reference to an SCM by making it an input to an
+ empty asm. This avoids the code size and slowdown of an actual function
+ call. Unfortunately there doesn't seem to be any way to do the varargs
+ scm_remember_upto_here like this.
+
+ __volatile__ ensures nothing will be moved across the asm, and it won't
+ be optimized away (or only if proved unreachable). Constraint "g" can be
+ used on all processors and allows any memory or general register (or
+ immediate) operand. The actual asm syntax doesn't matter, we don't want
+ to use it, just ensure the operand is still alive. See "Extended Asm" in
+ the GCC manual for more. */
+
+#ifdef __GNUC__
+#define scm_remember_upto_here_1(x) \
+ do { \
+ __asm__ __volatile__ ("" : : "g" (x)); \
+ } while (0)
+#define scm_remember_upto_here_2(x, y) \
+ do { \
+ scm_remember_upto_here_1 (x); \
+ scm_remember_upto_here_1 (y); \
+ } while (0)
+#endif
+
+SCM_API SCM scm_return_first (SCM elt, ...);
+SCM_API int scm_return_first_int (int x, ...);
+SCM_API SCM scm_permanent_object (SCM obj);
+SCM_API SCM scm_gc_protect_object (SCM obj);
+SCM_API SCM scm_gc_unprotect_object (SCM obj);
+SCM_API void scm_gc_register_root (SCM *p);
+SCM_API void scm_gc_unregister_root (SCM *p);
+SCM_API void scm_gc_register_roots (SCM *b, unsigned long n);
+SCM_API void scm_gc_unregister_roots (SCM *b, unsigned long n);
+SCM_API void scm_storage_prehistory (void);
+SCM_API int scm_init_storage (void);
+SCM_API void *scm_get_stack_base (void);
+SCM_API void scm_init_gc (void);
+
+#if SCM_ENABLE_DEPRECATED == 1
+
+SCM_API SCM scm_deprecated_newcell (void);
+SCM_API SCM scm_deprecated_newcell2 (void);
+
+#define SCM_NEWCELL(_into) \
+ do { _into = scm_deprecated_newcell (); } while (0)
+#define SCM_NEWCELL2(_into) \
+ do { _into = scm_deprecated_newcell2 (); } while (0)
+
+SCM_API void * scm_must_malloc (size_t len, const char *what);
+SCM_API void * scm_must_realloc (void *where,
+ size_t olen, size_t len,
+ const char *what);
+SCM_API char *scm_must_strdup (const char *str);
+SCM_API char *scm_must_strndup (const char *str, size_t n);
+SCM_API void scm_done_malloc (long size);
+SCM_API void scm_done_free (long size);
+SCM_API void scm_must_free (void *obj);
+
+#endif
+
+#endif /* SCM_GC_H */
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff