| 1 | /*
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| 2 | * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
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| 3 | * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
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| 4 | * Copyright (c) 2000 by Hewlett-Packard Company. All rights reserved.
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| 5 | *
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| 6 | * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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| 7 | * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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| 8 | *
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| 9 | * Permission is hereby granted to use or copy this program
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| 10 | * for any purpose, provided the above notices are retained on all copies.
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| 11 | * Permission to modify the code and to distribute modified code is granted,
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| 12 | * provided the above notices are retained, and a notice that the code was
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| 13 | * modified is included with the above copyright notice.
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| 14 | */
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| 15 | /* Boehm, February 7, 1996 4:32 pm PST */
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| 16 |
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| 17 | #include <stdio.h>
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| 18 | #include "private/gc_priv.h"
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| 19 |
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| 20 | extern ptr_t GC_clear_stack(); /* in misc.c, behaves like identity */
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| 21 | void GC_extend_size_map(); /* in misc.c. */
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| 22 |
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| 23 | /* Allocate reclaim list for kind: */
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| 24 | /* Return TRUE on success */
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| 25 | GC_bool GC_alloc_reclaim_list(kind)
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| 26 | register struct obj_kind * kind;
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| 27 | {
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| 28 | struct hblk ** result = (struct hblk **)
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| 29 | GC_scratch_alloc((MAXOBJSZ+1) * sizeof(struct hblk *));
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| 30 | if (result == 0) return(FALSE);
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| 31 | BZERO(result, (MAXOBJSZ+1)*sizeof(struct hblk *));
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| 32 | kind -> ok_reclaim_list = result;
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| 33 | return(TRUE);
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| 34 | }
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| 35 |
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| 36 | /* Allocate a large block of size lw words. */
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| 37 | /* The block is not cleared. */
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| 38 | /* Flags is 0 or IGNORE_OFF_PAGE. */
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| 39 | ptr_t GC_alloc_large(lw, k, flags)
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| 40 | word lw;
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| 41 | int k;
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| 42 | unsigned flags;
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| 43 | {
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| 44 | struct hblk * h;
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| 45 | word n_blocks = OBJ_SZ_TO_BLOCKS(lw);
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| 46 | ptr_t result;
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| 47 |
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| 48 | if (!GC_is_initialized) GC_init_inner();
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| 49 | /* Do our share of marking work */
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| 50 | if(GC_incremental && !GC_dont_gc)
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| 51 | GC_collect_a_little_inner((int)n_blocks);
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| 52 | h = GC_allochblk(lw, k, flags);
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| 53 | # ifdef USE_MUNMAP
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| 54 | if (0 == h) {
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| 55 | GC_merge_unmapped();
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| 56 | h = GC_allochblk(lw, k, flags);
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| 57 | }
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| 58 | # endif
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| 59 | while (0 == h && GC_collect_or_expand(n_blocks, (flags != 0))) {
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| 60 | h = GC_allochblk(lw, k, flags);
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| 61 | }
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| 62 | if (h == 0) {
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| 63 | result = 0;
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| 64 | } else {
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| 65 | int total_bytes = BYTES_TO_WORDS(n_blocks * HBLKSIZE);
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| 66 | if (n_blocks > 1) {
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| 67 | GC_large_allocd_bytes += n_blocks * HBLKSIZE;
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| 68 | if (GC_large_allocd_bytes > GC_max_large_allocd_bytes)
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| 69 | GC_max_large_allocd_bytes = GC_large_allocd_bytes;
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| 70 | }
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| 71 | result = (ptr_t) (h -> hb_body);
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| 72 | GC_words_wasted += total_bytes - lw;
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| 73 | }
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| 74 | return result;
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| 75 | }
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| 76 |
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| 77 |
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| 78 | /* Allocate a large block of size lb bytes. Clear if appropriate. */
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| 79 | ptr_t GC_alloc_large_and_clear(lw, k, flags)
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| 80 | word lw;
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| 81 | int k;
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| 82 | unsigned flags;
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| 83 | {
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| 84 | ptr_t result = GC_alloc_large(lw, k, flags);
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| 85 | word n_blocks = OBJ_SZ_TO_BLOCKS(lw);
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| 86 |
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| 87 | if (0 == result) return 0;
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| 88 | if (GC_debugging_started || GC_obj_kinds[k].ok_init) {
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| 89 | /* Clear the whole block, in case of GC_realloc call. */
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| 90 | BZERO(result, n_blocks * HBLKSIZE);
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| 91 | }
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| 92 | return result;
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| 93 | }
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| 94 |
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| 95 | /* allocate lb bytes for an object of kind k. */
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