1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8 #ifndef _NGX_LIST_H_INCLUDED_
9 #define _NGX_LIST_H_INCLUDED_
10
11
12 #include <ngx_config.h>
13 #include <ngx_core.h>
14
15
16 typedef struct ngx_list_part_s ngx_list_part_t;
17
18 struct ngx_list_part_s {
19 void *elts;
20 ngx_uint_t nelts;
21 ngx_list_part_t *next;
22 };
23
24
25 typedef struct {
26 ngx_list_part_t *last;
27 ngx_list_part_t part;
28 size_t size;
29 ngx_uint_t nalloc;
30 ngx_pool_t *pool;
31 } ngx_list_t;
32
33
34 ngx_list_t *ngx_list_create(ngx_pool_t *pool, ngx_uint_t n, size_t size);
35
36 static ngx_inline ngx_int_t
ngx_list_init(ngx_list_t * list,ngx_pool_t * pool,ngx_uint_t n,size_t size)37 ngx_list_init(ngx_list_t *list, ngx_pool_t *pool, ngx_uint_t n, size_t size)
38 {
39 list->part.elts = ngx_palloc(pool, n * size);
40 if (list->part.elts == NULL) {
41 return NGX_ERROR;
42 }
43
44 list->part.nelts = 0;
45 list->part.next = NULL;
46 list->last = &list->part;
47 list->size = size;
48 list->nalloc = n;
49 list->pool = pool;
50
51 return NGX_OK;
52 }
53
54
55 /*
56 *
57 * the iteration through the list:
58 *
59 * part = &list.part;
60 * data = part->elts;
61 *
62 * for (i = 0 ;; i++) {
63 *
64 * if (i >= part->nelts) {
65 * if (part->next == NULL) {
66 * break;
67 * }
68 *
69 * part = part->next;
70 * data = part->elts;
71 * i = 0;
72 * }
73 *
74 * ... data[i] ...
75 *
76 * }
77 */
78
79
80 void *ngx_list_push(ngx_list_t *list);
81
82
83 #endif /* _NGX_LIST_H_INCLUDED_ */
84