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- /* classes: h_files */
- #ifndef GCH
- #define GCH
- /* Copyright (C) 1995, 96, 98, 99, 2000, 2002 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. */
- #include "libguile/__scm.h"
- #include "libguile/hooks.h"
- 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;
- 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
- 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:
- */
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