nginx: src/core/ngx_slab.c annotate

annotate src/core/ngx_slab.c @ 6823:88c8c3d65184

Slab: improved code readability. No functional changes.

author	Ruslan Ermilov <ru@nginx.com>
date	Wed, 07 Dec 2016 22:25:37 +0300
parents	87d7e640b45d
children	ea12328518dc

rev	line source
441 da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files Igor Sysoev <igor@sysoev.ru> parents: 357 diff changeset	1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files Igor Sysoev <igor@sysoev.ru> parents: 357 diff changeset	2 /*
444 42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright Igor Sysoev <igor@sysoev.ru> parents: 441 diff changeset	3 * Copyright (C) Igor Sysoev
4412 d620f497c50f Copyright updated. Maxim Konovalov <maxim@nginx.com> parents: 4224 diff changeset	4 * Copyright (C) Nginx, Inc.
441 da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files Igor Sysoev <igor@sysoev.ru> parents: 357 diff changeset	5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files Igor Sysoev <igor@sysoev.ru> parents: 357 diff changeset	6
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	7 #include <ngx_config.h>
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	8 #include <ngx_core.h>
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	9
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	10
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	11 #define NGX_SLAB_PAGE_MASK 3
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	12 #define NGX_SLAB_PAGE 0
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	13 #define NGX_SLAB_BIG 1
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	14 #define NGX_SLAB_EXACT 2
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	15 #define NGX_SLAB_SMALL 3
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	16
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	17 #if (NGX_PTR_SIZE == 4)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	18
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	19 #define NGX_SLAB_PAGE_FREE 0
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	20 #define NGX_SLAB_PAGE_BUSY 0xffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	21 #define NGX_SLAB_PAGE_START 0x80000000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	22
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	23 #define NGX_SLAB_SHIFT_MASK 0x0000000f
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	24 #define NGX_SLAB_MAP_MASK 0xffff0000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	25 #define NGX_SLAB_MAP_SHIFT 16
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	26
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	27 #define NGX_SLAB_BUSY 0xffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	28
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	29 #else /* (NGX_PTR_SIZE == 8) */
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	30
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	31 #define NGX_SLAB_PAGE_FREE 0
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	32 #define NGX_SLAB_PAGE_BUSY 0xffffffffffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	33 #define NGX_SLAB_PAGE_START 0x8000000000000000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	34
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	35 #define NGX_SLAB_SHIFT_MASK 0x000000000000000f
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	36 #define NGX_SLAB_MAP_MASK 0xffffffff00000000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	37 #define NGX_SLAB_MAP_SHIFT 32
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	38
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	39 #define NGX_SLAB_BUSY 0xffffffffffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	40
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	41 #endif
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	42
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	43
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	44 #define ngx_slab_slots(pool) \
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	45 (ngx_slab_page_t ) ((u_char ) (pool) + sizeof(ngx_slab_pool_t))
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	46
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	47 #define ngx_slab_page_type(page) ((page)->prev & NGX_SLAB_PAGE_MASK)
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	48
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	49 #define ngx_slab_page_prev(page) \
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	50 (ngx_slab_page_t *) ((page)->prev & ~NGX_SLAB_PAGE_MASK)
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	51
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	52 #define ngx_slab_page_addr(pool, page) \
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	53 ((((page) - (pool)->pages) << ngx_pagesize_shift) \
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	54 + (uintptr_t) (pool)->start)
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	55
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	56
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	57 #if (NGX_DEBUG_MALLOC)
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	58
4224 4c4997de65b8 Using of junk value in slab allocator similar to modern FreeBSD values. Igor Sysoev <igor@sysoev.ru> parents: 4223 diff changeset	59 #define ngx_slab_junk(p, size) ngx_memset(p, 0xA5, size)
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	60
4764 0ed8088f43b4 Reduced the number of preprocessor directives. Ruslan Ermilov <ru@nginx.com> parents: 4412 diff changeset	61 #elif (NGX_HAVE_DEBUG_MALLOC)
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	62
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	63 #define ngx_slab_junk(p, size) \
4224 4c4997de65b8 Using of junk value in slab allocator similar to modern FreeBSD values. Igor Sysoev <igor@sysoev.ru> parents: 4223 diff changeset	64 if (ngx_debug_malloc) ngx_memset(p, 0xA5, size)
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	65
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	66 #else
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	67
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	68 #define ngx_slab_junk(p, size)
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	69
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	70 #endif
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	71
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	72 static ngx_slab_page_t ngx_slab_alloc_pages(ngx_slab_pool_t pool,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	73 ngx_uint_t pages);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	74 static void ngx_slab_free_pages(ngx_slab_pool_t pool, ngx_slab_page_t page,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	75 ngx_uint_t pages);
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	76 static void ngx_slab_error(ngx_slab_pool_t *pool, ngx_uint_t level,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	77 char *text);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	78
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	79
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	80 static ngx_uint_t ngx_slab_max_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	81 static ngx_uint_t ngx_slab_exact_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	82 static ngx_uint_t ngx_slab_exact_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	83
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	84
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	85 void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	86 ngx_slab_init(ngx_slab_pool_t *pool)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	87 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	88 u_char *p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	89 size_t size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	90 ngx_int_t m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	91 ngx_uint_t i, n, pages;
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	92 ngx_slab_page_t slots, page;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	93
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	94 /* STUB */
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	95 if (ngx_slab_max_size == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	96 ngx_slab_max_size = ngx_pagesize / 2;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	97 ngx_slab_exact_size = ngx_pagesize / (8 * sizeof(uintptr_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	98 for (n = ngx_slab_exact_size; n >>= 1; ngx_slab_exact_shift++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	99 /* void */
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	100 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	101 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	102 /**/
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	103
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	104 pool->min_size = 1 << pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	105
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	106 slots = ngx_slab_slots(pool);
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	107
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	108 p = (u_char *) slots;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	109 size = pool->end - p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	110
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	111 ngx_slab_junk(p, size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	112
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	113 n = ngx_pagesize_shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	114
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	115 for (i = 0; i < n; i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	116 slots[i].slab = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	117 slots[i].next = &slots[i];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	118 slots[i].prev = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	119 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	120
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	121 p += n * sizeof(ngx_slab_page_t);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	122
1645 31622d9f2c0d the simple expression has the same precision without overflow Igor Sysoev <igor@sysoev.ru> parents: 1018 diff changeset	123 pages = (ngx_uint_t) (size / (ngx_pagesize + sizeof(ngx_slab_page_t)));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	124
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	125 pool->pages = (ngx_slab_page_t *) p;
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	126 ngx_memzero(pool->pages, pages * sizeof(ngx_slab_page_t));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	127
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	128 page = pool->pages;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	129
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	130 pool->free.prev = 0;
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	131 pool->free.next = page;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	132
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	133 page->slab = pages;
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	134 page->next = &pool->free;
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	135 page->prev = (uintptr_t) &pool->free;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	136
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	137 pool->start = ngx_align_ptr(p + pages * sizeof(ngx_slab_page_t),
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	138 ngx_pagesize);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	139
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	140 m = pages - (pool->end - pool->start) / ngx_pagesize;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	141 if (m > 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	142 pages -= m;
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	143 page->slab = pages;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	144 }
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	145
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	146 pool->last = pool->pages + pages;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	147
5634 5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	148 pool->log_nomem = 1;
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	149 pool->log_ctx = &pool->zero;
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	150 pool->zero = '\0';
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	151 }
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	152
e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	153
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	154 void *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	155 ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	156 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	157 void *p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	158
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	159 ngx_shmtx_lock(&pool->mutex);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	160
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	161 p = ngx_slab_alloc_locked(pool, size);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	162
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	163 ngx_shmtx_unlock(&pool->mutex);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	164
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	165 return p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	166 }
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	167
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	168
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	169 void *
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	170 ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size)
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	171 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	172 size_t s;
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	173 uintptr_t p, n, m, mask, *bitmap;
5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	174 ngx_uint_t i, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	175 ngx_slab_page_t page, prev, *slots;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	176
5766 abdb027be9d5 Core: bugfix for the ngx_slab_max_size case. Jianjun Zheng <codeeply@gmail.com> parents: 5726 diff changeset	177 if (size > ngx_slab_max_size) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	178
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	179 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
967 1cb178720355 style fix Igor Sysoev <igor@sysoev.ru> parents: 966 diff changeset	180 "slab alloc: %uz", size);
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	181
4829 40de49cf6b37 Fixed overflow if ngx_slab_alloc() is called with very big "size" argument. Ruslan Ermilov <ru@nginx.com> parents: 4764 diff changeset	182 page = ngx_slab_alloc_pages(pool, (size >> ngx_pagesize_shift)
40de49cf6b37 Fixed overflow if ngx_slab_alloc() is called with very big "size" argument. Ruslan Ermilov <ru@nginx.com> parents: 4764 diff changeset	183 + ((size % ngx_pagesize) ? 1 : 0));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	184 if (page) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	185 p = ngx_slab_page_addr(pool, page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	186
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	187 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	188 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	189 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	190
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	191 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	192 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	193
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	194 if (size > pool->min_size) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	195 shift = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	196 for (s = size - 1; s >>= 1; shift++) { /* void */ }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	197 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	198
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	199 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	200 shift = pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	201 slot = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	202 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	203
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	204 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	205 "slab alloc: %uz slot: %ui", size, slot);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	206
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	207 slots = ngx_slab_slots(pool);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	208 page = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	209
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	210 if (page->next != page) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	211
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	212 if (shift < ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	213
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	214 do {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	215 bitmap = (uintptr_t *) ngx_slab_page_addr(pool, page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	216
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	217 map = (1 << (ngx_pagesize_shift - shift))
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	218 / (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	219
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	220 for (n = 0; n < map; n++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	221
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	222 if (bitmap[n] != NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	223
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	224 for (m = 1, i = 0; m; m <<= 1, i++) {
6807 ea76a3aa18ae Slab: style. Ruslan Ermilov <ru@nginx.com> parents: 6480 diff changeset	225 if (bitmap[n] & m) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	226 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	227 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	228
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	229 bitmap[n] \|= m;
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	230
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	231 i = ((n * sizeof(uintptr_t) * 8) << shift)
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	232 + (i << shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	233
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	234 if (bitmap[n] == NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	235 for (n = n + 1; n < map; n++) {
6474 2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	236 if (bitmap[n] != NGX_SLAB_BUSY) {
2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	237 p = (uintptr_t) bitmap + i;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	238
6474 2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	239 goto done;
2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	240 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	241 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	242
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	243 prev = ngx_slab_page_prev(page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	244 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	245 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	246
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	247 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	248 page->prev = NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	249 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	250
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	251 p = (uintptr_t) bitmap + i;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	252
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	253 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	254 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	255 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	256 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	257
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	258 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	259
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	260 } while (page);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	261
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	262 } else if (shift == ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	263
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	264 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	265 if (page->slab != NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	266
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	267 for (m = 1, i = 0; m; m <<= 1, i++) {
6807 ea76a3aa18ae Slab: style. Ruslan Ermilov <ru@nginx.com> parents: 6480 diff changeset	268 if (page->slab & m) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	269 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	270 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	271
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	272 page->slab \|= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	273
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	274 if (page->slab == NGX_SLAB_BUSY) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	275 prev = ngx_slab_page_prev(page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	276 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	277 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	278
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	279 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	280 page->prev = NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	281 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	282
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	283 p = ngx_slab_page_addr(pool, page) + (i << shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	284
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	285 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	286 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	287 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	288
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	289 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	290
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	291 } while (page);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	292
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	293 } else { /* shift > ngx_slab_exact_shift */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	294
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	295 n = ngx_pagesize_shift - (page->slab & NGX_SLAB_SHIFT_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	296 n = 1 << n;
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	297 n = ((uintptr_t) 1 << n) - 1;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	298 mask = n << NGX_SLAB_MAP_SHIFT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	299
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	300 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	301 if ((page->slab & NGX_SLAB_MAP_MASK) != mask) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	302
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	303 for (m = (uintptr_t) 1 << NGX_SLAB_MAP_SHIFT, i = 0;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	304 m & mask;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	305 m <<= 1, i++)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	306 {
6807 ea76a3aa18ae Slab: style. Ruslan Ermilov <ru@nginx.com> parents: 6480 diff changeset	307 if (page->slab & m) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	308 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	309 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	310
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	311 page->slab \|= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	312
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	313 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	314 prev = ngx_slab_page_prev(page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	315 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	316 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	317
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	318 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	319 page->prev = NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	320 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	321
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	322 p = ngx_slab_page_addr(pool, page) + (i << shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	323
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	324 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	325 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	326 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	327
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	328 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	329
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	330 } while (page);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	331 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	332 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	333
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	334 page = ngx_slab_alloc_pages(pool, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	335
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	336 if (page) {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	337 if (shift < ngx_slab_exact_shift) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	338 bitmap = (uintptr_t *) ngx_slab_page_addr(pool, page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	339
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	340 s = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	341 n = (1 << (ngx_pagesize_shift - shift)) / 8 / s;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	342
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	343 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	344 n = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	345 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	346
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	347 bitmap[0] = (2 << n) - 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	348
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	349 map = (1 << (ngx_pagesize_shift - shift)) / (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	350
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	351 for (i = 1; i < map; i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	352 bitmap[i] = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	353 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	354
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	355 page->slab = shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	356 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	357 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	358
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	359 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	360
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	361 p = ngx_slab_page_addr(pool, page) + s * n;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	362
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	363 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	364
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	365 } else if (shift == ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	366
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	367 page->slab = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	368 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	369 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	370
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	371 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	372
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	373 p = ngx_slab_page_addr(pool, page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	374
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	375 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	376
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	377 } else { /* shift > ngx_slab_exact_shift */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	378
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	379 page->slab = ((uintptr_t) 1 << NGX_SLAB_MAP_SHIFT) \| shift;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	380 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	381 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	382
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	383 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	384
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	385 p = ngx_slab_page_addr(pool, page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	386
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	387 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	388 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	389 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	390
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	391 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	392
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	393 done:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	394
6480 f01ab2dbcfdc Fixed logging. Sergey Kandaurov <pluknet@nginx.com> parents: 6474 diff changeset	395 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
f01ab2dbcfdc Fixed logging. Sergey Kandaurov <pluknet@nginx.com> parents: 6474 diff changeset	396 "slab alloc: %p", (void *) p);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	397
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	398 return (void *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	399 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	400
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	401
5726 25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	402 void *
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	403 ngx_slab_calloc(ngx_slab_pool_t *pool, size_t size)
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	404 {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	405 void *p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	406
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	407 ngx_shmtx_lock(&pool->mutex);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	408
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	409 p = ngx_slab_calloc_locked(pool, size);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	410
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	411 ngx_shmtx_unlock(&pool->mutex);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	412
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	413 return p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	414 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	415
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	416
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	417 void *
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	418 ngx_slab_calloc_locked(ngx_slab_pool_t *pool, size_t size)
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	419 {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	420 void *p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	421
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	422 p = ngx_slab_alloc_locked(pool, size);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	423 if (p) {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	424 ngx_memzero(p, size);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	425 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	426
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	427 return p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	428 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	429
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	430
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	431 void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	432 ngx_slab_free(ngx_slab_pool_t pool, void p)
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	433 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	434 ngx_shmtx_lock(&pool->mutex);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	435
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	436 ngx_slab_free_locked(pool, p);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	437
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	438 ngx_shmtx_unlock(&pool->mutex);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	439 }
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	440
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	441
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	442 void
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	443 ngx_slab_free_locked(ngx_slab_pool_t pool, void p)
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	444 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	445 size_t size;
1018 06306a20b8bb fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 1016 diff changeset	446 uintptr_t slab, m, *bitmap;
06306a20b8bb fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 1016 diff changeset	447 ngx_uint_t n, type, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	448 ngx_slab_page_t slots, page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	449
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	450 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, "slab free: %p", p);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	451
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	452 if ((u_char ) p < pool->start \|\| (u_char ) p > pool->end) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	453 ngx_slab_error(pool, NGX_LOG_ALERT, "ngx_slab_free(): outside of pool");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	454 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	455 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	456
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	457 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	458 page = &pool->pages[n];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	459 slab = page->slab;
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	460 type = ngx_slab_page_type(page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	461
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	462 switch (type) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	463
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	464 case NGX_SLAB_SMALL:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	465
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	466 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	467 size = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	468
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	469 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	470 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	471 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	472
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	473 n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift;
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	474 m = (uintptr_t) 1 << (n & (sizeof(uintptr_t) * 8 - 1));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	475 n /= (sizeof(uintptr_t) * 8);
5362 79b9101cecf4 Handling of ngx_int_t != intptr_t case. Maxim Dounin <mdounin@mdounin.ru> parents: 4829 diff changeset	476 bitmap = (uintptr_t *)
79b9101cecf4 Handling of ngx_int_t != intptr_t case. Maxim Dounin <mdounin@mdounin.ru> parents: 4829 diff changeset	477 ((uintptr_t) p & ~((uintptr_t) ngx_pagesize - 1));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	478
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	479 if (bitmap[n] & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	480
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	481 if (page->next == NULL) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	482 slots = ngx_slab_slots(pool);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	483 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	484
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	485 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	486 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	487
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	488 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	489 page->next->prev = (uintptr_t) page \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	490 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	491
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	492 bitmap[n] &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	493
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	494 n = (1 << (ngx_pagesize_shift - shift)) / 8 / (1 << shift);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	495
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	496 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	497 n = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	498 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	499
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	500 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	501 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	502 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	503
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	504 map = (1 << (ngx_pagesize_shift - shift)) / (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	505
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	506 for (n = 1; n < map; n++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	507 if (bitmap[n]) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	508 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	509 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	510 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	511
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	512 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	513
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	514 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	515 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	516
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	517 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	518
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	519 case NGX_SLAB_EXACT:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	520
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	521 m = (uintptr_t) 1 <<
d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	522 (((uintptr_t) p & (ngx_pagesize - 1)) >> ngx_slab_exact_shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	523 size = ngx_slab_exact_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	524
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	525 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	526 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	527 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	528
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	529 if (slab & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	530 if (slab == NGX_SLAB_BUSY) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	531 slots = ngx_slab_slots(pool);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	532 slot = ngx_slab_exact_shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	533
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	534 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	535 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	536
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	537 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	538 page->next->prev = (uintptr_t) page \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	539 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	540
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	541 page->slab &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	542
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	543 if (page->slab) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	544 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	545 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	546
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	547 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	548
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	549 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	550 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	551
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	552 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	553
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	554 case NGX_SLAB_BIG:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	555
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	556 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	557 size = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	558
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	559 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	560 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	561 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	562
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	563 m = (uintptr_t) 1 << ((((uintptr_t) p & (ngx_pagesize - 1)) >> shift)
d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	564 + NGX_SLAB_MAP_SHIFT);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	565
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	566 if (slab & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	567
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	568 if (page->next == NULL) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	569 slots = ngx_slab_slots(pool);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	570 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	571
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	572 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	573 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	574
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	575 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	576 page->next->prev = (uintptr_t) page \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	577 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	578
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	579 page->slab &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	580
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	581 if (page->slab & NGX_SLAB_MAP_MASK) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	582 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	583 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	584
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	585 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	586
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	587 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	588 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	589
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	590 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	591
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	592 case NGX_SLAB_PAGE:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	593
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	594 if ((uintptr_t) p & (ngx_pagesize - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	595 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	596 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	597
6809 87d7e640b45d Slab: improved double free detection. Ruslan Ermilov <ru@nginx.com> parents: 6808 diff changeset	598 if (!(slab & NGX_SLAB_PAGE_START)) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	599 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	600 "ngx_slab_free(): page is already free");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	601 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	602 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	603
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	604 if (slab == NGX_SLAB_PAGE_BUSY) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	605 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	606 "ngx_slab_free(): pointer to wrong page");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	607 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	608 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	609
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	610 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	611 size = slab & ~NGX_SLAB_PAGE_START;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	612
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	613 ngx_slab_free_pages(pool, &pool->pages[n], size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	614
2711 6b87e875e87a fix building by BCC without NGX_DEBUG_MALLOC Igor Sysoev <igor@sysoev.ru> parents: 2611 diff changeset	615 ngx_slab_junk(p, size << ngx_pagesize_shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	616
2711 6b87e875e87a fix building by BCC without NGX_DEBUG_MALLOC Igor Sysoev <igor@sysoev.ru> parents: 2611 diff changeset	617 return;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	618 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	619
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	620 /* not reached */
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	621
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	622 return;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	623
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	624 done:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	625
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	626 ngx_slab_junk(p, size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	627
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	628 return;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	629
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	630 wrong_chunk:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	631
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	632 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	633 "ngx_slab_free(): pointer to wrong chunk");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	634
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	635 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	636
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	637 chunk_already_free:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	638
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	639 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	640 "ngx_slab_free(): chunk is already free");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	641
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	642 fail:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	643
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	644 return;
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	645 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	646
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	647
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	648 static ngx_slab_page_t *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	649 ngx_slab_alloc_pages(ngx_slab_pool_t *pool, ngx_uint_t pages)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	650 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	651 ngx_slab_page_t page, p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	652
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	653 for (page = pool->free.next; page != &pool->free; page = page->next) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	654
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	655 if (page->slab >= pages) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	656
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	657 if (page->slab > pages) {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	658 page[page->slab - 1].prev = (uintptr_t) &page[pages];
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	659
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	660 page[pages].slab = page->slab - pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	661 page[pages].next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	662 page[pages].prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	663
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	664 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	665 p->next = &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	666 page->next->prev = (uintptr_t) &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	667
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	668 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	669 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	670 p->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	671 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	672 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	673
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	674 page->slab = pages \| NGX_SLAB_PAGE_START;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	675 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	676 page->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	677
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	678 if (--pages == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	679 return page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	680 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	681
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	682 for (p = page + 1; pages; pages--) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	683 p->slab = NGX_SLAB_PAGE_BUSY;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	684 p->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	685 p->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	686 p++;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	687 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	688
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	689 return page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	690 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	691 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	692
5634 5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	693 if (pool->log_nomem) {
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	694 ngx_slab_error(pool, NGX_LOG_CRIT,
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	695 "ngx_slab_alloc() failed: no memory");
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	696 }
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	697
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	698 return NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	699 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	700
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	701
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	702 static void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	703 ngx_slab_free_pages(ngx_slab_pool_t pool, ngx_slab_page_t page,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	704 ngx_uint_t pages)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	705 {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	706 ngx_slab_page_t prev, join;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	707
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	708 page->slab = pages--;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	709
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	710 if (pages) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	711 ngx_memzero(&page[1], pages * sizeof(ngx_slab_page_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	712 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	713
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	714 if (page->next) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	715 prev = ngx_slab_page_prev(page);
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	716 prev->next = page->next;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	717 page->next->prev = page->prev;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	718 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	719
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	720 join = page + page->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	721
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	722 if (join < pool->last) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	723
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	724 if (ngx_slab_page_type(join) == NGX_SLAB_PAGE) {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	725
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	726 if (join->next != NULL) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	727 pages += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	728 page->slab += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	729
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	730 prev = ngx_slab_page_prev(join);
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	731 prev->next = join->next;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	732 join->next->prev = join->prev;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	733
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	734 join->slab = NGX_SLAB_PAGE_FREE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	735 join->next = NULL;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	736 join->prev = NGX_SLAB_PAGE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	737 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	738 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	739 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	740
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	741 if (page > pool->pages) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	742 join = page - 1;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	743
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	744 if (ngx_slab_page_type(join) == NGX_SLAB_PAGE) {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	745
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	746 if (join->slab == NGX_SLAB_PAGE_FREE) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	747 join = ngx_slab_page_prev(join);
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	748 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	749
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	750 if (join->next != NULL) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	751 pages += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	752 join->slab += page->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	753
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	754 prev = ngx_slab_page_prev(join);
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	755 prev->next = join->next;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	756 join->next->prev = join->prev;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	757
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	758 page->slab = NGX_SLAB_PAGE_FREE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	759 page->next = NULL;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	760 page->prev = NGX_SLAB_PAGE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	761
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	762 page = join;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	763 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	764 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	765 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	766
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	767 if (pages) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	768 page[pages].prev = (uintptr_t) page;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	769 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	770
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	771 page->prev = (uintptr_t) &pool->free;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	772 page->next = pool->free.next;
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	773
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	774 page->next->prev = (uintptr_t) page;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	775
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	776 pool->free.next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	777 }
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	778
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	779
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	780 static void
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	781 ngx_slab_error(ngx_slab_pool_t pool, ngx_uint_t level, char text)
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	782 {
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	783 ngx_log_error(level, ngx_cycle->log, 0, "%s%s", text, pool->log_ctx);
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	784 }

Mercurial > hg > nginx

annotate src/core/ngx_slab.c @ 6823:88c8c3d65184