nginx-quic: src/core/ngx

annotate src/core/ngx_slab.c @ 6829:6e757036e588

Slab: free pages statistics.

author	Ruslan Ermilov <ru@nginx.com>
date	Wed, 07 Dec 2016 22:25:37 +0300
parents	99770a5ea14f
children	6eed5ed31e22

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++) {
6824 ea12328518dc Slab: added comment about list heads. Ruslan Ermilov <ru@nginx.com> parents: 6823 diff changeset	116 /* only "next" is used in list head */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	117 slots[i].slab = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	118 slots[i].next = &slots[i];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	119 slots[i].prev = 0;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	122 p += n * sizeof(ngx_slab_page_t);
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	123
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	124 pool->stats = (ngx_slab_stat_t *) p;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	125 ngx_memzero(pool->stats, n * sizeof(ngx_slab_stat_t));
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	126
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	127 p += n * sizeof(ngx_slab_stat_t);
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	128
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	129 size -= n * (sizeof(ngx_slab_page_t) + sizeof(ngx_slab_stat_t));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	130
1645 31622d9f2c0d the simple expression has the same precision without overflow Igor Sysoev <igor@sysoev.ru> parents: 1018 diff changeset	131 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	132
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	133 pool->pages = (ngx_slab_page_t *) p;
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	134 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	135
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	136 page = pool->pages;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	137
6824 ea12328518dc Slab: added comment about list heads. Ruslan Ermilov <ru@nginx.com> parents: 6823 diff changeset	138 /* only "next" is used in list head */
ea12328518dc Slab: added comment about list heads. Ruslan Ermilov <ru@nginx.com> parents: 6823 diff changeset	139 pool->free.slab = 0;
ea12328518dc Slab: added comment about list heads. Ruslan Ermilov <ru@nginx.com> parents: 6823 diff changeset	140 pool->free.next = page;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	141 pool->free.prev = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	142
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	143 page->slab = pages;
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	144 page->next = &pool->free;
88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	145 page->prev = (uintptr_t) &pool->free;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	146
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	147 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	148 ngx_pagesize);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	149
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	150 m = pages - (pool->end - pool->start) / ngx_pagesize;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	151 if (m > 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	152 pages -= m;
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	153 page->slab = pages;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	154 }
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	155
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	156 pool->last = pool->pages + pages;
6829 6e757036e588 Slab: free pages statistics. Ruslan Ermilov <ru@nginx.com> parents: 6828 diff changeset	157 pool->pfree = pages;
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	158
5634 5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	159 pool->log_nomem = 1;
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	160 pool->log_ctx = &pool->zero;
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	161 pool->zero = '\0';
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	162 }
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	163
e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	164
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	165 void *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	166 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	167 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	168 void *p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	169
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	170 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	171
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	172 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	173
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	174 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	175
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	176 return p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	177 }
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	178
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	179
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	180 void *
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	181 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	182 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	183 size_t s;
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	184 uintptr_t p, n, m, mask, *bitmap;
5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	185 ngx_uint_t i, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	186 ngx_slab_page_t page, prev, *slots;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	187
5766 abdb027be9d5 Core: bugfix for the ngx_slab_max_size case. Jianjun Zheng <codeeply@gmail.com> parents: 5726 diff changeset	188 if (size > ngx_slab_max_size) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	189
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	190 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
967 1cb178720355 style fix Igor Sysoev <igor@sysoev.ru> parents: 966 diff changeset	191 "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	192
4829 40de49cf6b37 Fixed overflow if ngx_slab_alloc() is called with very big "size" argument. Ruslan Ermilov <ru@nginx.com> parents: 4764 diff changeset	193 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	194 + ((size % ngx_pagesize) ? 1 : 0));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	195 if (page) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	196 p = ngx_slab_page_addr(pool, page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	197
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	198 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	199 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	200 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	201
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	202 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	205 if (size > pool->min_size) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	206 shift = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	207 for (s = size - 1; s >>= 1; shift++) { /* void */ }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	208 slot = shift - pool->min_shift;
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 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	211 shift = pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	212 slot = 0;
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
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	215 pool->stats[slot].reqs++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	216
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	217 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	218 "slab alloc: %uz slot: %ui", size, slot);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	219
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	220 slots = ngx_slab_slots(pool);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	221 page = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	222
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	223 if (page->next != page) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	224
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	225 if (shift < ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	226
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	227 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	228
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	229 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	230
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	231 for (n = 0; n < map; n++) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	232
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	233 if (bitmap[n] != NGX_SLAB_BUSY) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	234
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	235 for (m = 1, i = 0; m; m <<= 1, i++) {
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	236 if (bitmap[n] & m) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	237 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	238 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	239
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	240 bitmap[n] \|= m;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	241
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	242 i = (n * sizeof(uintptr_t) * 8 + i) << shift;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	243
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	244 p = (uintptr_t) bitmap + i;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	245
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	246 pool->stats[slot].used++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	247
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	248 if (bitmap[n] == NGX_SLAB_BUSY) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	249 for (n = n + 1; n < map; n++) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	250 if (bitmap[n] != NGX_SLAB_BUSY) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	251 goto done;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	252 }
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	253 }
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	254
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	255 prev = ngx_slab_page_prev(page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	256 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	257 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	258
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	259 page->next = NULL;
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	260 page->prev = NGX_SLAB_SMALL;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	261 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	262
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	263 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	264 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	265 }
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	266 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	267
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	268 } else if (shift == ngx_slab_exact_shift) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	269
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	270 for (m = 1, i = 0; m; m <<= 1, i++) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	271 if (page->slab & m) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	272 continue;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	273 }
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	274
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	275 page->slab \|= m;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	276
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	277 if (page->slab == NGX_SLAB_BUSY) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	278 prev = ngx_slab_page_prev(page);
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	279 prev->next = page->next;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	280 page->next->prev = page->prev;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	281
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	282 page->next = NULL;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	283 page->prev = NGX_SLAB_EXACT;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	284 }
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	285
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	286 p = ngx_slab_page_addr(pool, page) + (i << shift);
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	287
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	288 pool->stats[slot].used++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	289
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	290 goto done;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	291 }
860 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
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	295 mask = ((uintptr_t) 1 << (ngx_pagesize >> shift)) - 1;
0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	296 mask <<= NGX_SLAB_MAP_SHIFT;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	297
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	298 for (m = (uintptr_t) 1 << NGX_SLAB_MAP_SHIFT, i = 0;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	299 m & mask;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	300 m <<= 1, i++)
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	301 {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	302 if (page->slab & m) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	303 continue;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	304 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	305
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	306 page->slab \|= m;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	307
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	308 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) {
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	309 prev = ngx_slab_page_prev(page);
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	310 prev->next = page->next;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	311 page->next->prev = page->prev;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	312
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	313 page->next = NULL;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	314 page->prev = NGX_SLAB_BIG;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	315 }
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	316
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	317 p = ngx_slab_page_addr(pool, page) + (i << shift);
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	318
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	319 pool->stats[slot].used++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	320
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	321 goto done;
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	322 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	323 }
6826 d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	324
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	325 ngx_slab_error(pool, NGX_LOG_ALERT, "ngx_slab_alloc(): page is busy");
d0404c9a7675 Slab: simplified allocation from slots. Ruslan Ermilov <ru@nginx.com> parents: 6825 diff changeset	326 ngx_debug_point();
860 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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	329 page = ngx_slab_alloc_pages(pool, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	330
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	331 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	332 if (shift < ngx_slab_exact_shift) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	333 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	334
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	335 n = (ngx_pagesize >> shift) / ((1 << shift) * 8);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	336
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	337 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	338 n = 1;
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
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	341 bitmap[0] = ((uintptr_t) 2 << n) - 1;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	342
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	343 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	344
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	345 for (i = 1; i < map; i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	346 bitmap[i] = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	347 }
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 page->slab = shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	350 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	351 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	352
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	353 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	354
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	355 pool->stats[slot].total += (ngx_pagesize >> shift) - n;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	356
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	357 p = ngx_slab_page_addr(pool, page) + (n << shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	358
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	359 pool->stats[slot].used++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	360
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	361 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	362
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	363 } else if (shift == ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	364
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	365 page->slab = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	366 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	367 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	368
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	369 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	370
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	371 pool->stats[slot].total += sizeof(uintptr_t) * 8;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 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
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	375 pool->stats[slot].used++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	376
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	377 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	378
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	379 } else { /* shift > ngx_slab_exact_shift */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	380
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	381 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	382 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	383 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	384
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	385 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	386
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	387 pool->stats[slot].total += ngx_pagesize >> shift;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	388
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	389 p = ngx_slab_page_addr(pool, page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	390
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	391 pool->stats[slot].used++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	392
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	393 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	394 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	395 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	396
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	397 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	398
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	399 pool->stats[slot].fails++;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	400
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	401 done:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	402
6480 f01ab2dbcfdc Fixed logging. Sergey Kandaurov <pluknet@nginx.com> parents: 6474 diff changeset	403 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
f01ab2dbcfdc Fixed logging. Sergey Kandaurov <pluknet@nginx.com> parents: 6474 diff changeset	404 "slab alloc: %p", (void *) p);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	405
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	406 return (void *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	407 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	408
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	409
5726 25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	410 void *
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	411 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	412 {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	413 void *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 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	416
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	417 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	418
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	419 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	420
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	421 return p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	422 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	423
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	424
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	425 void *
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	426 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	427 {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	428 void *p;
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 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	431 if (p) {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	432 ngx_memzero(p, size);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	433 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	434
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	435 return p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	436 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	437
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	438
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	439 void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	440 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	441 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	442 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	443
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	444 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	445
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	446 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	447 }
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	448
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	449
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	450 void
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	451 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	452 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	453 size_t size;
1018 06306a20b8bb fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 1016 diff changeset	454 uintptr_t slab, m, *bitmap;
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	455 ngx_uint_t i, n, type, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	456 ngx_slab_page_t slots, page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	457
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	458 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	459
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	460 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	461 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	462 goto fail;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	465 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	466 page = &pool->pages[n];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	467 slab = page->slab;
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	468 type = ngx_slab_page_type(page);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	469
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	470 switch (type) {
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 case NGX_SLAB_SMALL:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	473
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	474 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	475 size = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	476
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	477 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	478 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	479 }
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 n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift;
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	482 m = (uintptr_t) 1 << (n % (sizeof(uintptr_t) * 8));
0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	483 n /= sizeof(uintptr_t) * 8;
5362 79b9101cecf4 Handling of ngx_int_t != intptr_t case. Maxim Dounin <mdounin@mdounin.ru> parents: 4829 diff changeset	484 bitmap = (uintptr_t *)
79b9101cecf4 Handling of ngx_int_t != intptr_t case. Maxim Dounin <mdounin@mdounin.ru> parents: 4829 diff changeset	485 ((uintptr_t) p & ~((uintptr_t) ngx_pagesize - 1));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	486
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	487 if (bitmap[n] & m) {
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	488 slot = shift - pool->min_shift;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	489
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	490 if (page->next == NULL) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	491 slots = ngx_slab_slots(pool);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	492
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	493 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	494 slots[slot].next = page;
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 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	497 page->next->prev = (uintptr_t) page \| NGX_SLAB_SMALL;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	500 bitmap[n] &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	501
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	502 n = (ngx_pagesize >> shift) / ((1 << shift) * 8);
860 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 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	505 n = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	506 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	507
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	508 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	509 goto done;
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
6827 0e61510c56c4 Slab: simplified some math. Ruslan Ermilov <ru@nginx.com> parents: 6826 diff changeset	512 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	513
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	514 for (i = 1; i < map; i++) {
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	515 if (bitmap[i]) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	516 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	517 }
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	520 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	521
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	522 pool->stats[slot].total -= (ngx_pagesize >> shift) - n;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	523
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	524 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	525 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	526
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	527 goto chunk_already_free;
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 case NGX_SLAB_EXACT:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	530
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	531 m = (uintptr_t) 1 <<
d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	532 (((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	533 size = ngx_slab_exact_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	534
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	535 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	536 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	537 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	538
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	539 if (slab & m) {
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	540 slot = ngx_slab_exact_shift - pool->min_shift;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	541
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	542 if (slab == NGX_SLAB_BUSY) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	543 slots = ngx_slab_slots(pool);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	544
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	545 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	546 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	547
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	548 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	549 page->next->prev = (uintptr_t) page \| NGX_SLAB_EXACT;
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 page->slab &= ~m;
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 if (page->slab) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	555 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	556 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	557
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	558 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	559
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	560 pool->stats[slot].total -= sizeof(uintptr_t) * 8;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	561
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	562 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	563 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	564
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	565 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	566
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	567 case NGX_SLAB_BIG:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	568
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	569 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	570 size = 1 << 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 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	573 goto wrong_chunk;
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
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	576 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	577 + NGX_SLAB_MAP_SHIFT);
860 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 if (slab & m) {
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	580 slot = shift - pool->min_shift;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	581
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	582 if (page->next == NULL) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	583 slots = ngx_slab_slots(pool);
860 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 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	586 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	587
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	588 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	589 page->next->prev = (uintptr_t) page \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	590 }
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 page->slab &= ~m;
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 (page->slab & NGX_SLAB_MAP_MASK) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	595 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	598 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	599
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	600 pool->stats[slot].total -= ngx_pagesize >> shift;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	601
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	602 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	605 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	606
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	607 case NGX_SLAB_PAGE:
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 if ((uintptr_t) p & (ngx_pagesize - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	610 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	611 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	612
6809 87d7e640b45d Slab: improved double free detection. Ruslan Ermilov <ru@nginx.com> parents: 6808 diff changeset	613 if (!(slab & NGX_SLAB_PAGE_START)) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	614 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	615 "ngx_slab_free(): page is already free");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	616 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	617 }
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 if (slab == NGX_SLAB_PAGE_BUSY) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	620 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	621 "ngx_slab_free(): pointer to wrong page");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	622 goto fail;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	625 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	626 size = slab & ~NGX_SLAB_PAGE_START;
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 ngx_slab_free_pages(pool, &pool->pages[n], size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	629
2711 6b87e875e87a fix building by BCC without NGX_DEBUG_MALLOC Igor Sysoev <igor@sysoev.ru> parents: 2611 diff changeset	630 ngx_slab_junk(p, size << ngx_pagesize_shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	631
2711 6b87e875e87a fix building by BCC without NGX_DEBUG_MALLOC Igor Sysoev <igor@sysoev.ru> parents: 2611 diff changeset	632 return;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	633 }
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 /* not reached */
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 return;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	638
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	639 done:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	640
6828 99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	641 pool->stats[slot].used--;
99770a5ea14f Slab: slots statistics. Ruslan Ermilov <ru@nginx.com> parents: 6827 diff changeset	642
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	643 ngx_slab_junk(p, size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	644
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	645 return;
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 wrong_chunk:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	648
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	649 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	650 "ngx_slab_free(): pointer to wrong chunk");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	651
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	652 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	653
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	654 chunk_already_free:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	655
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	656 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	657 "ngx_slab_free(): chunk is already free");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	658
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	659 fail:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	660
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	661 return;
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	662 }
860 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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	665 static ngx_slab_page_t *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	666 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	667 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	668 ngx_slab_page_t page, p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	669
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	670 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	671
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	672 if (page->slab >= pages) {
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 if (page->slab > pages) {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	675 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	676
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	677 page[pages].slab = page->slab - pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	678 page[pages].next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	679 page[pages].prev = page->prev;
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 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	682 p->next = &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	683 page->next->prev = (uintptr_t) &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	684
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	685 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	686 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	687 p->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	688 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	689 }
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 page->slab = pages \| NGX_SLAB_PAGE_START;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	692 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	693 page->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	694
6829 6e757036e588 Slab: free pages statistics. Ruslan Ermilov <ru@nginx.com> parents: 6828 diff changeset	695 pool->pfree -= pages;
6e757036e588 Slab: free pages statistics. Ruslan Ermilov <ru@nginx.com> parents: 6828 diff changeset	696
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	697 if (--pages == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	698 return page;
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 for (p = page + 1; pages; pages--) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	702 p->slab = NGX_SLAB_PAGE_BUSY;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	703 p->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	704 p->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	705 p++;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	706 }
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 return page;
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 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	711
5634 5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	712 if (pool->log_nomem) {
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	713 ngx_slab_error(pool, NGX_LOG_CRIT,
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	714 "ngx_slab_alloc() failed: no memory");
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	715 }
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	716
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	717 return NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	718 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	719
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	720
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	721 static void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	722 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	723 ngx_uint_t pages)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	724 {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	725 ngx_slab_page_t prev, join;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	726
6829 6e757036e588 Slab: free pages statistics. Ruslan Ermilov <ru@nginx.com> parents: 6828 diff changeset	727 pool->pfree += pages;
6e757036e588 Slab: free pages statistics. Ruslan Ermilov <ru@nginx.com> parents: 6828 diff changeset	728
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	729 page->slab = pages--;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	730
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	731 if (pages) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	732 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	733 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	734
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	735 if (page->next) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	736 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	737 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	738 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	739 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	740
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	741 join = page + page->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	742
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	743 if (join < pool->last) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	744
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	745 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	746
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	747 if (join->next != NULL) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	748 pages += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	749 page->slab += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	750
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	751 prev = ngx_slab_page_prev(join);
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	752 prev->next = join->next;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	753 join->next->prev = join->prev;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	754
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	755 join->slab = NGX_SLAB_PAGE_FREE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	756 join->next = NULL;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	757 join->prev = NGX_SLAB_PAGE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	758 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	759 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	760 }
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 if (page > pool->pages) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	763 join = page - 1;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	764
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	765 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	766
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	767 if (join->slab == NGX_SLAB_PAGE_FREE) {
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	768 join = ngx_slab_page_prev(join);
5718 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
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	771 if (join->next != NULL) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	772 pages += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	773 join->slab += page->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	774
6823 88c8c3d65184 Slab: improved code readability. Ruslan Ermilov <ru@nginx.com> parents: 6809 diff changeset	775 prev = ngx_slab_page_prev(join);
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	776 prev->next = join->next;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	777 join->next->prev = join->prev;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	778
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	779 page->slab = NGX_SLAB_PAGE_FREE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	780 page->next = NULL;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	781 page->prev = NGX_SLAB_PAGE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	782
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	783 page = join;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	784 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	785 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	786 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	787
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	788 if (pages) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	789 page[pages].prev = (uintptr_t) page;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	790 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	791
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	792 page->prev = (uintptr_t) &pool->free;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	793 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	794
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	795 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	796
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	797 pool->free.next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	798 }
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	799
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	800
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	801 static void
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	802 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	803 {
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	804 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	805 }

Mercurial > hg > nginx-quic

annotate src/core/ngx_slab.c @ 6829:6e757036e588