-/*
- (c) FSF 2002.
-*/
-
-
-#ifndef PRIVATE_GC
-#define PRIVATE_GC
-
-#include "_scm.h"
-
-/* {heap tuning parameters}
- *
- * These are parameters for controlling memory allocation. The heap
- * is the area out of which scm_cons, and object headers are allocated.
- *
- * Each heap cell is 8 bytes on a 32 bit machine and 16 bytes on a
- * 64 bit machine. The units of the _SIZE parameters are bytes.
- * Cons pairs and object headers occupy one heap cell.
- *
- * SCM_INIT_HEAP_SIZE is the initial size of heap. If this much heap is
- * allocated initially the heap will grow by half its current size
- * each subsequent time more heap is needed.
- *
- * If SCM_INIT_HEAP_SIZE heap cannot be allocated initially, SCM_HEAP_SEG_SIZE
- * will be used, and the heap will grow by SCM_HEAP_SEG_SIZE when more
- * heap is needed. SCM_HEAP_SEG_SIZE must fit into type size_t. This code
- * is in scm_init_storage() and alloc_some_heap() in sys.c
- *
- * If SCM_INIT_HEAP_SIZE can be allocated initially, the heap will grow by
- * SCM_EXPHEAP(scm_heap_size) when more heap is needed.
- *
- * SCM_MIN_HEAP_SEG_SIZE is minimum size of heap to accept when more heap
- * is needed.
- */
-
-
-/*
- * Heap size 45000 and 40% min yield gives quick startup and no extra
- * heap allocation. Having higher values on min yield may lead to
- * large heaps, especially if code behaviour is varying its
- * maximum consumption between different freelists.
- */
-
-/*
- These values used to be global C variables. However, they're also
- available through the environment, and having a double interface is
- confusing. Now they're #defines --hwn.
- */
-
-#define SCM_DEFAULT_INIT_HEAP_SIZE_1 256*1024
-#define SCM_DEFAULT_MIN_YIELD_1 40
-#define SCM_DEFAULT_INIT_HEAP_SIZE_2 32*1024
-
-/* The following value may seem large, but note that if we get to GC at
- * all, this means that we have a numerically intensive application
- */
-#define SCM_DEFAULT_MIN_YIELD_2 40
-
-#define SCM_DEFAULT_MAX_SEGMENT_SIZE (20*1024*1024L)
-
-
-
-#define SCM_MIN_HEAP_SEG_SIZE (8 * SCM_GC_SIZEOF_CARD)
-#define SCM_HEAP_SEG_SIZE (16384L * sizeof (scm_t_cell))
-
-
-#define SCM_DOUBLECELL_ALIGNED_P(x) (((2 * sizeof (scm_t_cell) - 1) & SCM_UNPACK (x)) == 0)
-
-
-#define SCM_GC_CARD_BVEC_SIZE_IN_LONGS \
- ((SCM_GC_CARD_N_CELLS + SCM_C_BVEC_LONG_BITS - 1) / SCM_C_BVEC_LONG_BITS)
-#define SCM_GC_IN_CARD_HEADERP(x) \
- (scm_t_cell *) (x) < SCM_GC_CELL_CARD (x) + SCM_GC_CARD_N_HEADER_CELLS
-
-
-int scm_getenv_int (const char *var, int def);
-
-
-typedef enum { return_on_error, abort_on_error } policy_on_error;
-
-/* gc-freelist*/
-
-/*
- FREELIST:
-
- A struct holding GC statistics on a particular type of cells.
-*/
-typedef struct scm_t_cell_type_statistics {
-
- /*
- heap segment where the last cell was allocated
- */
- int heap_segment_idx;
-
- /* minimum yield on this list in order not to grow the heap
- */
- long min_yield;
-
- /* defines min_yield as percent of total heap size
- */
- int min_yield_fraction;
-
- /* number of cells per object on this list */
- int span;
-
- /* number of collected cells during last GC */
- unsigned long collected;
-
- /* number of collected cells during penultimate GC */
- unsigned long collected_1;
-
- /* total number of cells in heap segments
- * belonging to this list.
- */
- unsigned long heap_size;
-
-
-} scm_t_cell_type_statistics;
-
-
-/* Sweep statistics. */
-typedef struct scm_sweep_statistics
-{
- /* Number of cells "swept", i.e., visited during the sweep operation. */
- unsigned swept;
-
- /* Number of cells collected during the sweep operation. This number must
- alsways be lower than or equal to SWEPT. */
- unsigned collected;
-} scm_t_sweep_statistics;
-
-#define scm_i_sweep_statistics_init(_stats) \
- do \
- { \
- (_stats)->swept = (_stats)->collected = 0; \
- } \
- while (0)
-
-#define scm_i_sweep_statistics_sum(_sum, _addition) \
- do \
- { \
- (_sum)->swept += (_addition).swept; \
- (_sum)->collected += (_addition).collected; \
- } \
- while (0)
-
-\f
-extern scm_t_cell_type_statistics scm_i_master_freelist;
-extern scm_t_cell_type_statistics scm_i_master_freelist2;
-
-void scm_i_adjust_min_yield (scm_t_cell_type_statistics *freelist,
- scm_t_sweep_statistics sweep_stats,
- scm_t_sweep_statistics sweep_stats_1);
-void scm_i_gc_sweep_freelist_reset (scm_t_cell_type_statistics *freelist);
-int scm_i_gc_grow_heap_p (scm_t_cell_type_statistics * freelist);
-
-
-#define SCM_HEAP_SIZE \
- (scm_i_master_freelist.heap_size + scm_i_master_freelist2.heap_size)
-
-
-#define SCM_MAX(A, B) ((A) > (B) ? (A) : (B))
-#define SCM_MIN(A, B) ((A) < (B) ? (A) : (B))
-
-/* CELL_P checks a random word whether it has the right form for a
- pointer to a cell. Use scm_i_find_heap_segment_containing_object
- to find out whether it actually points to a real cell.
-
- The right form for a cell pointer is this: the low three bits must
- be scm_tc3_cons, and when the scm_tc3_cons tag is stripped, the
- resulting pointer must be correctly aligned.
- scm_i_initialize_heap_segment_data guarantees that the test below
- works.
-*/
-#define CELL_P(x) ((SCM_UNPACK(x) & (sizeof(scm_t_cell)-1)) == scm_tc3_cons)
-
-/*
- gc-mark
- */
-
-
-void scm_mark_all (void);
-
-
-
-/*
-gc-segment:
-*/
-
-
-
-
-/*
-
- Cells are stored in a heap-segment: it is a contiguous chunk of
- memory, that associated with one freelist.
-*/
-
-typedef struct scm_t_heap_segment
-{
- /*
- {lower, upper} bounds of the segment
-
- The upper bound is also the start of the mark space.
- */
- scm_t_cell *bounds[2];
-
- /*
- If we ever decide to give it back, we could do it with this ptr.
-
- Note that giving back memory is not very useful; as long we don't
- touch a chunk of memory, the virtual memory system will keep it
- swapped out. We could simply forget about a block.
-
- (not that we do that, but anyway.)
- */
-
- void* malloced;
-
- scm_t_cell * next_free_card;
-
- /* address of the head-of-freelist pointer for this segment's cells.
- All segments usually point to the same one, scm_i_freelist. */
- scm_t_cell_type_statistics *freelist;
-
- /* number of cells per object in this segment */
- int span;
-
-
- /*
- Is this the first time that the cells are accessed?
- */
- int first_time;
-
-} scm_t_heap_segment;
-
-
-
-/*
-
- A table of segment records is kept that records the upper and
- lower extents of the segment; this is used during the conservative
- phase of gc to identify probably gc roots (because they point
- into valid segments at reasonable offsets).
-
-*/
-extern scm_t_heap_segment ** scm_i_heap_segment_table;
-extern size_t scm_i_heap_segment_table_size;
-
-
-int scm_i_init_card_freelist (scm_t_cell * card, SCM *free_list,scm_t_heap_segment*);
-int scm_i_sweep_card (scm_t_cell * card, SCM *free_list, scm_t_heap_segment*);
-void scm_i_card_statistics (scm_t_cell *p, SCM hashtab, scm_t_heap_segment *seg);
-char const *scm_i_tag_name (scm_t_bits tag); /* MOVEME */
-
-int scm_i_initialize_heap_segment_data (scm_t_heap_segment * segment, size_t requested);
-int scm_i_segment_card_count (scm_t_heap_segment * seg);
-int scm_i_segment_cell_count (scm_t_heap_segment * seg);
-
-void scm_i_clear_segment_mark_space (scm_t_heap_segment *seg);
-scm_t_heap_segment * scm_i_make_empty_heap_segment (scm_t_cell_type_statistics*);
-SCM scm_i_sweep_some_cards (scm_t_heap_segment *seg,
- scm_t_sweep_statistics *sweep_stats);
-void scm_i_sweep_segment (scm_t_heap_segment *seg,
- scm_t_sweep_statistics *sweep_stats);
-
-void scm_i_heap_segment_statistics (scm_t_heap_segment *seg, SCM tab);
-
-
-int scm_i_insert_segment (scm_t_heap_segment * seg);
-long int scm_i_find_heap_segment_containing_object (SCM obj);
-int scm_i_get_new_heap_segment (scm_t_cell_type_statistics *,
- scm_t_sweep_statistics,
- policy_on_error);
-void scm_i_clear_mark_space (void);
-void scm_i_sweep_segments (void);
-SCM scm_i_sweep_some_segments (scm_t_cell_type_statistics *fl,
- scm_t_sweep_statistics *sweep_stats);
-void scm_i_reset_segments (void);
-void scm_i_sweep_all_segments (char const *reason,
- scm_t_sweep_statistics *sweep_stats);
-SCM scm_i_all_segments_statistics (SCM hashtab);
-void scm_i_make_initial_segment (int init_heap_size, scm_t_cell_type_statistics *freelist);
-
-extern long int scm_i_deprecated_memory_return;
-
-
-/*
- global init funcs.
- */
-void scm_gc_init_malloc (void);
-void scm_gc_init_freelist (void);
-void scm_gc_init_segments (void);
-void scm_gc_init_mark (void);
-
-
-#endif
+/*
+ * private-gc.h - private declarations for garbage collection.
+ *
+ * Copyright (C) 2002, 03, 04, 05, 06, 07, 08 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
+ */
+
+#ifndef PRIVATE_GC
+#define PRIVATE_GC
+
+#include "_scm.h"
+
+/* {heap tuning parameters}
+ *
+ * These are parameters for controlling memory allocation. The heap
+ * is the area out of which scm_cons, and object headers are allocated.
+ *
+ * Each heap cell is 8 bytes on a 32 bit machine and 16 bytes on a
+ * 64 bit machine. The units of the _SIZE parameters are bytes.
+ * Cons pairs and object headers occupy one heap cell.
+ *
+ * SCM_MIN_HEAP_SEG_SIZE is minimum size of heap to accept when more heap
+ * is needed.
+ */
+
+
+/*
+ * Heap size 45000 and 40% min yield gives quick startup and no extra
+ * heap allocation. Having higher values on min yield may lead to
+ * large heaps, especially if code behaviour is varying its
+ * maximum consumption between different freelists.
+ */
+
+/*
+ These values used to be global C variables. However, they're also
+ available through the environment, and having a double interface is
+ confusing. Now they're #defines --hwn.
+ */
+
+#define SCM_DEFAULT_INIT_HEAP_SIZE_1 256*1024
+#define SCM_DEFAULT_MIN_YIELD_1 40
+#define SCM_DEFAULT_INIT_HEAP_SIZE_2 32*1024
+
+/*
+ How many cells to collect during one sweep call. This is the pool
+ size of each thread.
+ */
+#define DEFAULT_SWEEP_AMOUNT 512
+
+/* The following value may seem large, but note that if we get to GC at
+ * all, this means that we have a numerically intensive application
+ */
+#define SCM_DEFAULT_MIN_YIELD_2 40
+
+#define SCM_DEFAULT_MAX_SEGMENT_SIZE (20*1024*1024L)
+
+#define SCM_MIN_HEAP_SEG_SIZE (8 * SCM_GC_SIZEOF_CARD)
+#define SCM_HEAP_SEG_SIZE (16384L * sizeof (scm_t_cell))
+
+#define SCM_DOUBLECELL_ALIGNED_P(x) (((2 * sizeof (scm_t_cell) - 1) & SCM_UNPACK (x)) == 0)
+
+
+#define SCM_GC_CARD_BVEC_SIZE_IN_LONGS \
+ ((SCM_GC_CARD_N_CELLS + SCM_C_BVEC_LONG_BITS - 1) / SCM_C_BVEC_LONG_BITS)
+#define SCM_GC_IN_CARD_HEADERP(x) \
+ (scm_t_cell *) (x) < SCM_GC_CELL_CARD (x) + SCM_GC_CARD_N_HEADER_CELLS
+
+int scm_getenv_int (const char *var, int def);
+
+
+typedef enum { return_on_error, abort_on_error } policy_on_error;
+
+
+#define SCM_MAX(A, B) ((A) > (B) ? (A) : (B))
+#define SCM_MIN(A, B) ((A) < (B) ? (A) : (B))
+
+/* CELL_P checks a random word whether it has the right form for a
+ pointer to a cell. Use scm_i_find_heap_segment_containing_object
+ to find out whether it actually points to a real cell.
+
+ The right form for a cell pointer is this: the low three bits must
+ be scm_tc3_cons, and when the scm_tc3_cons tag is stripped, the
+ resulting pointer must be correctly aligned.
+ scm_i_initialize_heap_segment_data guarantees that the test below
+ works.
+*/
+#define CELL_P(x) ((SCM_UNPACK(x) & (sizeof(scm_t_cell)-1)) == scm_tc3_cons)
+
+/*
+ gc-mark
+ */
+
+/* this can be used to ensure that set/clear gc marks only happen when
+ allowed. */
+int scm_i_marking;
+
+void scm_mark_all (void);
+
+extern long int scm_i_deprecated_memory_return;
+extern long int scm_i_find_heap_calls;
+
+/*
+ global init funcs.
+ */
+void scm_gc_init_malloc (void);
+void scm_gc_init_freelist (void);
+void scm_gc_init_segments (void);
+void scm_gc_init_mark (void);
+
+
+#endif
HCoop / bpt / guile.git / blobdiff