nginx: src/core/ngx_slab.c annotate

annotate src/core/ngx_slab.c @ 2610:3a9b22405138

delete old debugging and info

author	Igor Sysoev <igor@sysoev.ru>
date	Fri, 27 Mar 2009 16:37:39 +0000
parents	ae3bfe9aa093
children	2bce3f6416c6

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
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	4 */
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
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	6 #include <ngx_config.h>
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	7 #include <ngx_core.h>
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	8
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 #define NGX_SLAB_PAGE_MASK 3
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	11 #define NGX_SLAB_PAGE 0
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	12 #define NGX_SLAB_BIG 1
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	13 #define NGX_SLAB_EXACT 2
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	14 #define NGX_SLAB_SMALL 3
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	15
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	16 #if (NGX_PTR_SIZE == 4)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	17
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	18 #define NGX_SLAB_PAGE_FREE 0
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	19 #define NGX_SLAB_PAGE_BUSY 0xffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	20 #define NGX_SLAB_PAGE_START 0x80000000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	21
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	22 #define NGX_SLAB_SHIFT_MASK 0x0000000f
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	23 #define NGX_SLAB_MAP_MASK 0xffff0000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	24 #define NGX_SLAB_MAP_SHIFT 16
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	25
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	26 #define NGX_SLAB_BUSY 0xffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	27
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	28 #else /* (NGX_PTR_SIZE == 8) */
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	29
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	30 #define NGX_SLAB_PAGE_FREE 0
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	31 #define NGX_SLAB_PAGE_BUSY 0xffffffffffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	32 #define NGX_SLAB_PAGE_START 0x8000000000000000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	33
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	34 #define NGX_SLAB_SHIFT_MASK 0x000000000000000f
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	35 #define NGX_SLAB_MAP_MASK 0xffffffff00000000
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	36 #define NGX_SLAB_MAP_SHIFT 32
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	37
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	38 #define NGX_SLAB_BUSY 0xffffffffffffffff
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	39
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	40 #endif
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	41
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 #if (NGX_DEBUG_MALLOC)
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	44
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	45 #define ngx_slab_junk(p, size) ngx_memset(p, 0xD0, size)
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	46
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	47 #else
1771 b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	48
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	49 #if (NGX_FREEBSD)
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	50
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	51 #define ngx_slab_junk(p, size) \
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	52 if (ngx_freebsd_debug_malloc) ngx_memset(p, 0xD0, size)
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	53
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	54 #else
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	55
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	56 #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	57
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	58 #endif
b794d78e52c5 take MALLOC_OPTIONS=J into account in slab allocator Igor Sysoev <igor@sysoev.ru> parents: 1645 diff changeset	59
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	60 #endif
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	61
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	62 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	63 ngx_uint_t pages);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	64 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	65 ngx_uint_t pages);
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	68 static ngx_uint_t ngx_slab_max_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	69 static ngx_uint_t ngx_slab_exact_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	70 static ngx_uint_t ngx_slab_exact_shift;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	73 void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	74 ngx_slab_init(ngx_slab_pool_t *pool)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	75 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	76 u_char *p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	77 size_t size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	78 ngx_int_t m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	79 ngx_uint_t i, n, pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	80 ngx_slab_page_t *slots;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	81
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	82 /* STUB */
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	83 if (ngx_slab_max_size == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	84 ngx_slab_max_size = ngx_pagesize / 2;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	85 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	86 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	87 /* void */
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	92 pool->min_size = 1 << pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	93
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	94 p = (u_char *) pool + sizeof(ngx_slab_pool_t);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	95 size = pool->end - p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	96
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	97 ngx_slab_junk(p, size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	98
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	99 slots = (ngx_slab_page_t *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	100 n = ngx_pagesize_shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	101
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	102 for (i = 0; i < n; i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	103 slots[i].slab = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	104 slots[i].next = &slots[i];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	105 slots[i].prev = 0;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	108 p += n * sizeof(ngx_slab_page_t);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	109
1645 31622d9f2c0d the simple expression has the same precision without overflow Igor Sysoev <igor@sysoev.ru> parents: 1018 diff changeset	110 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	111
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	112 ngx_memzero(p, pages * sizeof(ngx_slab_page_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	113
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	114 pool->pages = (ngx_slab_page_t *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	115
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	116 pool->free.prev = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	117 pool->free.next = (ngx_slab_page_t *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	118
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	119 pool->pages->slab = pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	120 pool->pages->next = &pool->free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	121 pool->pages->prev = (uintptr_t) &pool->free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	122
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	123 pool->start = (u_char *)
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	124 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	125 ngx_pagesize);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	126
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	127 m = pages - (pool->end - pool->start) / ngx_pagesize;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	128 if (m > 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	129 pages -= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	130 pool->pages->slab = pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	131 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	132 }
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	133
e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	134
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	135 void *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	136 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	137 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	138 void *p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	139
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	140 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	141
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	142 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	143
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	144 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	145
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	146 return p;
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	147 }
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
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	150 void *
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	151 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	152 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	153 size_t s;
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	154 uintptr_t p, n, m, mask, *bitmap;
5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	155 ngx_uint_t i, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	156 ngx_slab_page_t page, prev, *slots;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	157
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	158 if (size >= ngx_slab_max_size) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	159
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	160 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0,
967 1cb178720355 style fix Igor Sysoev <igor@sysoev.ru> parents: 966 diff changeset	161 "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	162
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	163 page = ngx_slab_alloc_pages(pool, (size + ngx_pagesize - 1)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	164 >> ngx_pagesize_shift);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	165 if (page) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	166 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	167 p += (uintptr_t) pool->start;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	168
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	169 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	170 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	171 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	172
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	173 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	174 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	175
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	176 if (size > pool->min_size) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	177 shift = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	178 for (s = size - 1; s >>= 1; shift++) { /* void */ }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	179 slot = shift - pool->min_shift;
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 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	182 size = pool->min_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	183 shift = pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	184 slot = 0;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	187 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	188 "slab alloc: %uz slot: %ui", size, slot);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	189
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	190 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	191 page = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	192
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	193 if (page->next != page) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	194
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	195 if (shift < ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	196
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	197 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	198 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	199 bitmap = (uintptr_t *) (pool->start + p);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	200
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	201 map = (1 << (ngx_pagesize_shift - shift))
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	202 / (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	203
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	204 for (n = 0; n < map; n++) {
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 if (bitmap[n] != NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	207
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	208 for (m = 1, i = 0; m; m <<= 1, i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	209 if ((bitmap[n] & m)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	210 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	211 }
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 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	214
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	215 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	216 + (i << shift);
860 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 if (bitmap[n] == NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	219 for (n = n + 1; n < map; n++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	220 if (bitmap[n] != NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	221 p = (uintptr_t) bitmap + i;
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 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	224 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	225 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	226
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	227 prev = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	228 (page->prev & ~NGX_SLAB_PAGE_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	229 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	230 page->next->prev = page->prev;
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 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	233 page->prev = NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	234 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	235
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	236 p = (uintptr_t) bitmap + i;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	237
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	238 goto done;
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 }
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 page = page->next;
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 } while (page);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	246
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	247 } else if (shift == ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	248
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	249 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	250 if (page->slab != NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	251
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	252 for (m = 1, i = 0; m; m <<= 1, i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	253 if ((page->slab & m)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	254 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	255 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	256
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	257 page->slab \|= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	258
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	259 if (page->slab == NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	260 prev = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	261 (page->prev & ~NGX_SLAB_PAGE_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	262 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	263 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	264
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	265 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	266 page->prev = NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	267 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	268
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	269 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	270 p += i << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	271 p += (uintptr_t) pool->start;
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 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	274 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	275 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	276
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	277 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	278
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	279 } while (page);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	280
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	281 } else { /* shift > ngx_slab_exact_shift */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	282
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	283 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	284 n = 1 << n;
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	285 n = ((uintptr_t) 1 << n) - 1;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	286 mask = n << NGX_SLAB_MAP_SHIFT;
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 do {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	289 if ((page->slab & NGX_SLAB_MAP_MASK) != mask) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	290
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	291 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	292 m & mask;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	293 m <<= 1, i++)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	294 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	295 if ((page->slab & m)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	296 continue;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	297 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	298
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	299 page->slab \|= m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	300
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	301 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	302 prev = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	303 (page->prev & ~NGX_SLAB_PAGE_MASK);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	304 prev->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	305 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	306
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	307 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	308 page->prev = NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	309 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	310
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	311 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	312 p += i << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	313 p += (uintptr_t) pool->start;
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 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	316 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	317 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	318
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	319 page = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	320
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	321 } while (page);
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	325 page = ngx_slab_alloc_pages(pool, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	326
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	327 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	328 if (shift < ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	329 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	330 bitmap = (uintptr_t *) (pool->start + p);
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 s = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	333 n = (1 << (ngx_pagesize_shift - shift)) / 8 / s;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	334
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	335 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	336 n = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	337 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	338
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	339 bitmap[0] = (2 << n) - 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	340
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	341 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	342
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	343 for (i = 1; i < map; i++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	344 bitmap[i] = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	345 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	346
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	347 page->slab = shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	348 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	349 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
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 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	352
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	353 p = ((page - pool->pages) << ngx_pagesize_shift) + s * n;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	354 p += (uintptr_t) pool->start;
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 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	357
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	358 } else if (shift == ngx_slab_exact_shift) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	359
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	360 page->slab = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	361 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	362 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	363
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	364 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	365
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	366 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	367 p += (uintptr_t) pool->start;
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 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	370
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	371 } else { /* shift > ngx_slab_exact_shift */
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	372
881 5ed08a4c3bd3 fix building on 64-bit platforms Igor Sysoev <igor@sysoev.ru> parents: 860 diff changeset	373 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	374 page->next = &slots[slot];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	375 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	376
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	377 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	378
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	379 p = (page - pool->pages) << ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	380 p += (uintptr_t) pool->start;
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 goto done;
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 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	385
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	386 p = 0;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	387
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	388 done:
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 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, "slab alloc: %p", p);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	391
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	392 return (void *) p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	393 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	394
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	395
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	396 void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	397 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	398 {
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	399 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	400
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	401 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	402
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	403 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	404 }
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	405
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	406
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	407 void
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	408 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	409 {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	410 size_t size;
1018 06306a20b8bb fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 1016 diff changeset	411 uintptr_t slab, m, *bitmap;
06306a20b8bb fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 1016 diff changeset	412 ngx_uint_t n, type, slot, shift, map;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	413 ngx_slab_page_t slots, page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	414
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	415 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	416
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	417 if ((u_char ) p < pool->start \|\| (u_char ) p > pool->end) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	418 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	419 "ngx_slab_free(): outside of pool");
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	420 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	421 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	422
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	423 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	424 page = &pool->pages[n];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	425 slab = page->slab;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	426 type = page->prev & NGX_SLAB_PAGE_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	427
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	428 switch (type) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	429
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	430 case NGX_SLAB_SMALL:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	431
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	432 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	433 size = 1 << shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	434
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	435 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	436 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	437 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	438
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	439 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	440 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	441 n /= (sizeof(uintptr_t) * 8);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	442 bitmap = (uintptr_t *) ((uintptr_t) p & ~(ngx_pagesize - 1));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	443
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	444 if (bitmap[n] & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	445
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	446 if (page->next == NULL) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	447 slots = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	448 ((u_char *) pool + sizeof(ngx_slab_pool_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	449 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	450
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	451 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	452 slots[slot].next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	453
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	454 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_SMALL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	455 page->next->prev = (uintptr_t) page \| NGX_SLAB_SMALL;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	458 bitmap[n] &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	459
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	460 n = (1 << (ngx_pagesize_shift - shift)) / 8 / (1 << shift);
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 if (n == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	463 n = 1;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	464 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	465
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	466 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) {
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	467 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	470 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	471
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	472 for (n = 1; n < map; n++) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	473 if (bitmap[n]) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	474 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	475 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	476 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	477
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	478 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	479
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	480 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	481 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	482
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	483 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	484
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	485 case NGX_SLAB_EXACT:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	486
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	487 m = (uintptr_t) 1 <<
d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	488 (((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	489 size = ngx_slab_exact_size;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	490
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	491 if ((uintptr_t) p & (size - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	492 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	493 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	494
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	495 if (slab & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	496 if (slab == NGX_SLAB_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	497 slots = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	498 ((u_char *) pool + sizeof(ngx_slab_pool_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	499 slot = ngx_slab_exact_shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	500
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	501 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	502 slots[slot].next = page;
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 page->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_EXACT;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	505 page->next->prev = (uintptr_t) page \| NGX_SLAB_EXACT;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	508 page->slab &= ~m;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	509
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	510 if (page->slab) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	511 goto done;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	514 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	515
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	516 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	517 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	518
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	519 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	520
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	521 case NGX_SLAB_BIG:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	522
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	523 shift = slab & NGX_SLAB_SHIFT_MASK;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	524 size = 1 << shift;
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
1016 d0e8c81d3bb7 fix slab allocator on 64-bit platfroms Igor Sysoev <igor@sysoev.ru> parents: 967 diff changeset	530 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	531 + NGX_SLAB_MAP_SHIFT);
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	532
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	533 if (slab & m) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	534
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	535 if (page->next == NULL) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	536 slots = (ngx_slab_page_t *)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	537 ((u_char *) pool + sizeof(ngx_slab_pool_t));
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	538 slot = shift - pool->min_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	539
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	540 page->next = slots[slot].next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	541 slots[slot].next = page;
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->prev = (uintptr_t) &slots[slot] \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	544 page->next->prev = (uintptr_t) page \| NGX_SLAB_BIG;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	545 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	546
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	547 page->slab &= ~m;
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 if (page->slab & NGX_SLAB_MAP_MASK) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	550 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	551 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	552
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	553 ngx_slab_free_pages(pool, page, 1);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	554
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	555 goto done;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	556 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	557
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	558 goto chunk_already_free;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	559
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	560 case NGX_SLAB_PAGE:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	561
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	562 if ((uintptr_t) p & (ngx_pagesize - 1)) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	563 goto wrong_chunk;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	564 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	565
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	566 if (slab == NGX_SLAB_PAGE_FREE) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	567 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	568 "ngx_slab_free(): page is already free");
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	569 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	570 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	571
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	572 if (slab == NGX_SLAB_PAGE_BUSY) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	573 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	574 "ngx_slab_free(): pointer to wrong page");
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	575 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	576 }
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 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	579 size = slab & ~NGX_SLAB_PAGE_START;
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 ngx_slab_free_pages(pool, &pool->pages[n], size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	582
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	583 size <<= ngx_pagesize_shift;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	584
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	585 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 /* not reached */
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 return;
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 done:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	593
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	594 ngx_slab_junk(p, size);
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	595
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	596 return;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	597
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	598 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 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	601 "ngx_slab_free(): pointer to wrong chunk");
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	602
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	603 goto fail;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	604
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	605 chunk_already_free:
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	606
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	607 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	608 "ngx_slab_free(): chunk is already free");
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	609
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	610 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 return;
357 e260514b9ad4 nginx-0.0.7-2004-06-16-23:36:07 import Igor Sysoev <igor@sysoev.ru> parents: diff changeset	613 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	614
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 static ngx_slab_page_t *
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	617 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	618 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	619 ngx_slab_page_t page, p;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	620
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	621 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	622
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	623 if (page->slab >= pages) {
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 if (page->slab > pages) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	626 page[pages].slab = page->slab - pages;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	627 page[pages].next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	628 page[pages].prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	629
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	630 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	631 p->next = &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	632 page->next->prev = (uintptr_t) &page[pages];
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	633
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	634 } else {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	635 p = (ngx_slab_page_t *) page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	636 p->next = page->next;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	637 page->next->prev = page->prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	638 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	639
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	640 page->slab = pages \| NGX_SLAB_PAGE_START;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	641 page->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	642 page->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	643
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	644 if (--pages == 0) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	645 return page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	646 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	647
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	648 for (p = page + 1; pages; pages--) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	649 p->slab = NGX_SLAB_PAGE_BUSY;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	650 p->next = NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	651 p->prev = NGX_SLAB_PAGE;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	652 p++;
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
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	655 return page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	656 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	657 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	658
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	659 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, NGX_ENOMEM,
2437 8e603804d0c1 style fix Igor Sysoev <igor@sysoev.ru> parents: 1771 diff changeset	660 "ngx_slab_alloc(): failed");
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	661
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	662 return NULL;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	663 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	664
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	665
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	666 static void
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	667 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	668 ngx_uint_t pages)
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	669 {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	670 ngx_slab_page_t *prev;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	671
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	672 page->slab = pages--;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	673
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	674 if (pages) {
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	675 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	676 }
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	677
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	678 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	679 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	680 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	681 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	682 }
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	683
966 715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	684 page->prev = (uintptr_t) &pool->free;
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	685 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	686
715336c243e1 many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked() Igor Sysoev <igor@sysoev.ru> parents: 881 diff changeset	687 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	688
860 201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	689 pool->free.next = page;
201d017ea470 slab allocator in shared memory Igor Sysoev <igor@sysoev.ru> parents: 826 diff changeset	690 }

Mercurial > hg > nginx

annotate src/core/ngx_slab.c @ 2610:3a9b22405138