nginx: src/core/ngx_slab.c annotate

annotate src/core/ngx_slab.c @ 6733:adc2414856b1

Modules compatibility: compatibility with NGX_THREADS. With this change it is now possible to load modules compiled without the "--with-threads" configure option into nginx binary compiled with it, and vice versa (if a module does not use thread-specific functions), assuming both use the "--with-compat" option.

author	Maxim Dounin <mdounin@mdounin.ru>
date	Mon, 10 Oct 2016 18:44:17 +0300
parents	f01ab2dbcfdc
children	ea76a3aa18ae

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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	44 #if (NGX_DEBUG_MALLOC)
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	45
4224 4c4997de65b8 Using of junk value in slab allocator similar to modern FreeBSD values. Igor Sysoev <igor@sysoev.ru> parents: 4223 diff changeset	46 #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	47
4764 0ed8088f43b4 Reduced the number of preprocessor directives. Ruslan Ermilov <ru@nginx.com> parents: 4412 diff changeset	48 #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	49
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	50 #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	51 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	52
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	53 #else
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	54
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	55 #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	56
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	57 #endif
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	58
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	59 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	60 ngx_uint_t pages);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	61 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	62 ngx_uint_t pages);
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	63 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	64 char *text);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	65
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	66
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	67 static ngx_uint_t ngx_slab_max_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	68 static ngx_uint_t ngx_slab_exact_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	69 static ngx_uint_t ngx_slab_exact_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	70
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	71
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	72 void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	73 ngx_slab_init(ngx_slab_pool_t *pool)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	74 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	75 u_char *p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	76 size_t size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	77 ngx_int_t m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	78 ngx_uint_t i, n, pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	79 ngx_slab_page_t *slots;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	80
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	81 /* STUB */
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	82 if (ngx_slab_max_size == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	83 ngx_slab_max_size = ngx_pagesize / 2;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	84 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	85 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	86 /* void */
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 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	89 /**/
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	90
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	91 pool->min_size = 1 << pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	92
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	93 p = (u_char *) pool + sizeof(ngx_slab_pool_t);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	94 size = pool->end - p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	95
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	96 ngx_slab_junk(p, size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	97
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	98 slots = (ngx_slab_page_t *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	99 n = ngx_pagesize_shift - pool->min_shift;
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 for (i = 0; i < n; i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	102 slots[i].slab = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	103 slots[i].next = &slots[i];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	104 slots[i].prev = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	105 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	106
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	107 p += n * sizeof(ngx_slab_page_t);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	108
1645 31622d9f2c0d the simple expression has the same precision without overflow Igor Sysoev <igor@sysoev.ru> parents: 1018 diff changeset	109 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	110
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	111 ngx_memzero(p, pages * sizeof(ngx_slab_page_t));
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 pool->pages = (ngx_slab_page_t *) p;
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 pool->free.prev = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	116 pool->free.next = (ngx_slab_page_t *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	117
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	118 pool->pages->slab = pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	119 pool->pages->next = &pool->free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	120 pool->pages->prev = (uintptr_t) &pool->free;
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 pool->start = (u_char *)
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	123 ngx_align_ptr((uintptr_t) p + pages * sizeof(ngx_slab_page_t),
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	124 ngx_pagesize);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	125
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	126 m = pages - (pool->end - pool->start) / ngx_pagesize;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	127 if (m > 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	128 pages -= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	129 pool->pages->slab = pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	130 }
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	131
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	132 pool->last = pool->pages + pages;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	133
5634 5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	134 pool->log_nomem = 1;
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	135 pool->log_ctx = &pool->zero;
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	136 pool->zero = '\0';
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	137 }
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	138
e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	139
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	140 void *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	141 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	142 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	143 void *p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	144
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	145 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	146
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	147 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	148
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	149 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	150
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	151 return p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	152 }
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	153
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	154
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	155 void *
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	156 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	157 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	158 size_t s;
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	159 uintptr_t p, n, m, mask, *bitmap;
5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	160 ngx_uint_t i, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	161 ngx_slab_page_t page, prev, *slots;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	162
5766 abdb027be9d5 Core: bugfix for the ngx_slab_max_size case. Jianjun Zheng <codeeply@gmail.com> parents: 5726 diff changeset	163 if (size > ngx_slab_max_size) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	164
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	165 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
967 1cb178720355 style fix Igor Sysoev <igor@sysoev.ru> parents: 966 diff changeset	166 "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	167
4829 40de49cf6b37 Fixed overflow if ngx_slab_alloc() is called with very big "size" argument. Ruslan Ermilov <ru@nginx.com> parents: 4764 diff changeset	168 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	169 + ((size % ngx_pagesize) ? 1 : 0));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	170 if (page) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	171 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	172 p += (uintptr_t) pool->start;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	173
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	174 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	175 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	176 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	177
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	178 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	179 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	180
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	181 if (size > pool->min_size) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	182 shift = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	183 for (s = size - 1; s >>= 1; shift++) { /* void */ }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	184 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	185
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	186 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	187 size = pool->min_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	188 shift = pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	189 slot = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	190 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	191
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	192 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	193 "slab alloc: %uz slot: %ui", size, slot);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	194
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	195 slots = (ngx_slab_page_t ) ((u_char ) pool + sizeof(ngx_slab_pool_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	196 page = slots[slot].next;
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 if (page->next != page) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	199
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	200 if (shift < ngx_slab_exact_shift) {
860 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 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	203 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	204 bitmap = (uintptr_t *) (pool->start + p);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	205
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	206 map = (1 << (ngx_pagesize_shift - shift))
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	207 / (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	208
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	209 for (n = 0; n < map; n++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	210
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	211 if (bitmap[n] != NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	212
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	213 for (m = 1, i = 0; m; m <<= 1, i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	214 if ((bitmap[n] & m)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	215 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	216 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	217
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	218 bitmap[n] \|= m;
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	219
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	220 i = ((n * sizeof(uintptr_t) * 8) << shift)
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	221 + (i << shift);
860 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 (bitmap[n] == NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	224 for (n = n + 1; n < map; n++) {
6474 2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	225 if (bitmap[n] != NGX_SLAB_BUSY) {
2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	226 p = (uintptr_t) bitmap + i;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	227
6474 2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	228 goto done;
2cd019520210 Style. Ruslan Ermilov <ru@nginx.com> parents: 5766 diff changeset	229 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	230 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	231
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	232 prev = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	233 (page->prev & ~NGX_SLAB_PAGE_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	234 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	235 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	236
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	237 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	238 page->prev = NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	239 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	240
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	241 p = (uintptr_t) bitmap + i;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	242
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	243 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	244 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	245 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	246 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	247
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	248 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	249
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	250 } while (page);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	251
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	252 } else if (shift == ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	253
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	254 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	255 if (page->slab != NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	256
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	257 for (m = 1, i = 0; m; m <<= 1, i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	258 if ((page->slab & m)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	259 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	260 }
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 page->slab \|= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	263
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	264 if (page->slab == NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	265 prev = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	266 (page->prev & ~NGX_SLAB_PAGE_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	267 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	268 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	269
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	270 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	271 page->prev = NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	272 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	273
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	274 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	275 p += i << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	276 p += (uintptr_t) pool->start;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	277
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	278 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	279 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	280 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	281
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	282 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	283
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	284 } while (page);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	285
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	286 } else { /* shift > ngx_slab_exact_shift */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	287
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	288 n = ngx_pagesize_shift - (page->slab & NGX_SLAB_SHIFT_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	289 n = 1 << n;
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	290 n = ((uintptr_t) 1 << n) - 1;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	291 mask = n << NGX_SLAB_MAP_SHIFT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	292
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	293 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	294 if ((page->slab & NGX_SLAB_MAP_MASK) != mask) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	295
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	296 for (m = (uintptr_t) 1 << NGX_SLAB_MAP_SHIFT, i = 0;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	297 m & mask;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	298 m <<= 1, i++)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	299 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	300 if ((page->slab & m)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	301 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	302 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	303
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	304 page->slab \|= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	305
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	306 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	307 prev = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	308 (page->prev & ~NGX_SLAB_PAGE_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	309 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	310 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	311
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	312 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	313 page->prev = NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	314 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	315
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	316 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	317 p += i << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	318 p += (uintptr_t) pool->start;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	319
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	320 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	321 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	322 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	323
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	324 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	325
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	326 } while (page);
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	330 page = ngx_slab_alloc_pages(pool, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	331
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	332 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	333 if (shift < ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	334 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	335 bitmap = (uintptr_t *) (pool->start + p);
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 s = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	338 n = (1 << (ngx_pagesize_shift - shift)) / 8 / s;
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 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	341 n = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	342 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	343
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	344 bitmap[0] = (2 << n) - 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	345
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	346 map = (1 << (ngx_pagesize_shift - shift)) / (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	347
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	348 for (i = 1; i < map; i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	349 bitmap[i] = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	350 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	351
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	352 page->slab = shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	353 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	354 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	355
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	356 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	357
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	358 p = ((page - pool->pages) << ngx_pagesize_shift) + s * n;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	359 p += (uintptr_t) pool->start;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	360
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	371 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	372 p += (uintptr_t) pool->start;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	373
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	374 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	375
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	376 } else { /* shift > ngx_slab_exact_shift */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	377
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	378 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	379 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	380 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	381
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	382 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	383
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	384 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	385 p += (uintptr_t) pool->start;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	386
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	387 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	388 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	389 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	390
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	391 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	392
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	393 done:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	394
6480 f01ab2dbcfdc Fixed logging. Sergey Kandaurov <pluknet@nginx.com> parents: 6474 diff changeset	395 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
f01ab2dbcfdc Fixed logging. Sergey Kandaurov <pluknet@nginx.com> parents: 6474 diff changeset	396 "slab alloc: %p", (void *) p);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	397
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	398 return (void *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	399 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	400
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	401
5726 25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	402 void *
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	403 ngx_slab_calloc(ngx_slab_pool_t *pool, size_t size)
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	404 {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	405 void *p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	406
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	407 ngx_shmtx_lock(&pool->mutex);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	408
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	409 p = ngx_slab_calloc_locked(pool, size);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	410
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	411 ngx_shmtx_unlock(&pool->mutex);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	412
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	413 return p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	414 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	415
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	416
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	417 void *
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	418 ngx_slab_calloc_locked(ngx_slab_pool_t *pool, size_t size)
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	419 {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	420 void *p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	421
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	422 p = ngx_slab_alloc_locked(pool, size);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	423 if (p) {
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	424 ngx_memzero(p, size);
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	425 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	426
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	427 return p;
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	428 }
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	429
25ade23cf281 Core: added ngx_slab_calloc() and ngx_slab_calloc_locked(). Ruslan Ermilov <ru@nginx.com> parents: 5718 diff changeset	430
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	431 void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	432 ngx_slab_free(ngx_slab_pool_t pool, void p)
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	433 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	434 ngx_shmtx_lock(&pool->mutex);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	435
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	436 ngx_slab_free_locked(pool, p);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	437
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	438 ngx_shmtx_unlock(&pool->mutex);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	439 }
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	440
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	441
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	442 void
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	443 ngx_slab_free_locked(ngx_slab_pool_t pool, void p)
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	444 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	445 size_t size;
1018 06306a20b8bb fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 1016 diff changeset	446 uintptr_t slab, m, *bitmap;
06306a20b8bb fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 1016 diff changeset	447 ngx_uint_t n, type, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	448 ngx_slab_page_t slots, page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	449
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	450 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, "slab free: %p", p);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	451
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	452 if ((u_char ) p < pool->start \|\| (u_char ) p > pool->end) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	453 ngx_slab_error(pool, NGX_LOG_ALERT, "ngx_slab_free(): outside of pool");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	454 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	455 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	456
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	457 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	458 page = &pool->pages[n];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	459 slab = page->slab;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	460 type = page->prev & NGX_SLAB_PAGE_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	461
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	462 switch (type) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	463
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	464 case NGX_SLAB_SMALL:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	465
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	466 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	467 size = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	468
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	469 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	470 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	471 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	472
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	473 n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift;
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	474 m = (uintptr_t) 1 << (n & (sizeof(uintptr_t) * 8 - 1));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	475 n /= (sizeof(uintptr_t) * 8);
5362 79b9101cecf4 Handling of ngx_int_t != intptr_t case. Maxim Dounin <mdounin@mdounin.ru> parents: 4829 diff changeset	476 bitmap = (uintptr_t *)
79b9101cecf4 Handling of ngx_int_t != intptr_t case. Maxim Dounin <mdounin@mdounin.ru> parents: 4829 diff changeset	477 ((uintptr_t) p & ~((uintptr_t) ngx_pagesize - 1));
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	478
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	479 if (bitmap[n] & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	480
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	481 if (page->next == NULL) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	482 slots = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	483 ((u_char *) pool + sizeof(ngx_slab_pool_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	484 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	485
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	486 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	487 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	488
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	489 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	490 page->next->prev = (uintptr_t) page \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	491 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	492
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	493 bitmap[n] &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	494
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	495 n = (1 << (ngx_pagesize_shift - shift)) / 8 / (1 << shift);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	496
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	497 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	498 n = 1;
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
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	501 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	502 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	505 map = (1 << (ngx_pagesize_shift - shift)) / (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	506
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	507 for (n = 1; n < map; n++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	508 if (bitmap[n]) {
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 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	512
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	513 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	514
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	515 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	516 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	517
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	518 goto chunk_already_free;
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 case NGX_SLAB_EXACT:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	521
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	522 m = (uintptr_t) 1 <<
d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	523 (((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	524 size = ngx_slab_exact_size;
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 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	527 goto wrong_chunk;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	530 if (slab & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	531 if (slab == NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	532 slots = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	533 ((u_char *) pool + sizeof(ngx_slab_pool_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	534 slot = ngx_slab_exact_shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	535
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	536 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	537 slots[slot].next = page;
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 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	540 page->next->prev = (uintptr_t) page \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	541 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	542
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	543 page->slab &= ~m;
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 if (page->slab) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	546 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	549 ngx_slab_free_pages(pool, page, 1);
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 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	552 }
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 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	555
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	556 case NGX_SLAB_BIG:
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 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	559 size = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	560
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	561 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	562 goto wrong_chunk;
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
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	565 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	566 + NGX_SLAB_MAP_SHIFT);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	567
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	568 if (slab & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	569
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	570 if (page->next == NULL) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	571 slots = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	572 ((u_char *) pool + sizeof(ngx_slab_pool_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	573 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	574
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	575 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	576 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	577
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	578 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	579 page->next->prev = (uintptr_t) page \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	580 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	581
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	582 page->slab &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	583
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	584 if (page->slab & NGX_SLAB_MAP_MASK) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	585 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	586 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	587
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	588 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	589
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	590 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	593 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	594
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	595 case NGX_SLAB_PAGE:
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 if ((uintptr_t) p & (ngx_pagesize - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	598 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	599 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	600
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	601 if (slab == NGX_SLAB_PAGE_FREE) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	602 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	603 "ngx_slab_free(): page is already free");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	604 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	605 }
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 if (slab == NGX_SLAB_PAGE_BUSY) {
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	608 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	609 "ngx_slab_free(): pointer to wrong page");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	610 goto fail;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	613 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	614 size = slab & ~NGX_SLAB_PAGE_START;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	615
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	616 ngx_slab_free_pages(pool, &pool->pages[n], size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	617
2711 6b87e875e87a fix building by BCC without NGX_DEBUG_MALLOC Igor Sysoev <igor@sysoev.ru> parents: 2611 diff changeset	618 ngx_slab_junk(p, size << ngx_pagesize_shift);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	619
2711 6b87e875e87a fix building by BCC without NGX_DEBUG_MALLOC Igor Sysoev <igor@sysoev.ru> parents: 2611 diff changeset	620 return;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	621 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	622
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	623 /* not reached */
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 return;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	626
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	627 done:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	628
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	629 ngx_slab_junk(p, size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	630
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	631 return;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	632
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	633 wrong_chunk:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	634
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	635 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	636 "ngx_slab_free(): pointer to wrong chunk");
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	637
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	638 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	639
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	640 chunk_already_free:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	641
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	642 ngx_slab_error(pool, NGX_LOG_ALERT,
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	643 "ngx_slab_free(): chunk is already free");
860 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 fail:
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 return;
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	648 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	649
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	650
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	651 static ngx_slab_page_t *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	652 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	653 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	654 ngx_slab_page_t page, p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	655
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	656 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	657
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	658 if (page->slab >= pages) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	659
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	660 if (page->slab > pages) {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	661 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	662
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	663 page[pages].slab = page->slab - pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	664 page[pages].next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	665 page[pages].prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	666
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	667 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	668 p->next = &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	669 page->next->prev = (uintptr_t) &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	670
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	671 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	672 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	673 p->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	674 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	675 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	676
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	677 page->slab = pages \| NGX_SLAB_PAGE_START;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	678 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	679 page->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	680
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	681 if (--pages == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	682 return page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	683 }
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 for (p = page + 1; pages; pages--) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	686 p->slab = NGX_SLAB_PAGE_BUSY;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	687 p->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	688 p->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	689 p++;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	690 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	691
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	692 return page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	693 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	694 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	695
5634 5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	696 if (pool->log_nomem) {
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	697 ngx_slab_error(pool, NGX_LOG_CRIT,
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	698 "ngx_slab_alloc() failed: no memory");
5024d29354f1 Core: slab log_nomem flag. Maxim Dounin <mdounin@mdounin.ru> parents: 5362 diff changeset	699 }
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	700
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	701 return NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	702 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	703
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	704
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	705 static void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	706 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	707 ngx_uint_t pages)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	708 {
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	709 ngx_uint_t type;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	710 ngx_slab_page_t prev, join;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	711
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	712 page->slab = pages--;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	713
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	714 if (pages) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	715 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	716 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	717
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	718 if (page->next) {
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	719 prev = (ngx_slab_page_t *) (page->prev & ~NGX_SLAB_PAGE_MASK);
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	720 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	721 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	722 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	723
5718 c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	724 join = page + page->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	725
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	726 if (join < pool->last) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	727 type = join->prev & NGX_SLAB_PAGE_MASK;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	728
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	729 if (type == NGX_SLAB_PAGE) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	730
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	731 if (join->next != NULL) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	732 pages += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	733 page->slab += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	734
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	735 prev = (ngx_slab_page_t *) (join->prev & ~NGX_SLAB_PAGE_MASK);
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	736 prev->next = join->next;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	737 join->next->prev = join->prev;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	738
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	739 join->slab = NGX_SLAB_PAGE_FREE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	740 join->next = NULL;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	741 join->prev = NGX_SLAB_PAGE;
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 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	744 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	745
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	746 if (page > pool->pages) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	747 join = page - 1;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	748 type = join->prev & NGX_SLAB_PAGE_MASK;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	749
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	750 if (type == NGX_SLAB_PAGE) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	751
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	752 if (join->slab == NGX_SLAB_PAGE_FREE) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	753 join = (ngx_slab_page_t *) (join->prev & ~NGX_SLAB_PAGE_MASK);
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
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	756 if (join->next != NULL) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	757 pages += join->slab;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	758 join->slab += page->slab;
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 prev = (ngx_slab_page_t *) (join->prev & ~NGX_SLAB_PAGE_MASK);
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	761 prev->next = join->next;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	762 join->next->prev = join->prev;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	763
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	764 page->slab = NGX_SLAB_PAGE_FREE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	765 page->next = NULL;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	766 page->prev = NGX_SLAB_PAGE;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	767
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	768 page = join;
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 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	772
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	773 if (pages) {
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	774 page[pages].prev = (uintptr_t) page;
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	775 }
c46657e391a3 Core: slab allocator free pages defragmentation. Maxim Dounin <mdounin@mdounin.ru> parents: 5634 diff changeset	776
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	777 page->prev = (uintptr_t) &pool->free;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	778 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	779
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	780 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	781
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	782 pool->free.next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	783 }
2611 2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	784
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	785
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	786 static void
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	787 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	788 {
2bce3f6416c6 improve ngx_slab_alloc() error logging Igor Sysoev <igor@sysoev.ru> parents: 2610 diff changeset	789 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	790 }

Mercurial > hg > nginx

annotate src/core/ngx_slab.c @ 6733:adc2414856b1