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annotate src/core/ngx_list.c @ 766:791ea37bc944

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ngx_list_create()
author Igor Sysoev <igor@sysoev.ru>
date Wed, 11 Oct 2006 12:47:11 +0000
parents d4ea69372b94
children d620f497c50f
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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7 #include <ngx_config.h>
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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8 #include <ngx_core.h>
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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11 ngx_list_t *
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12 ngx_list_create(ngx_pool_t *pool, ngx_uint_t n, size_t size)
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13 {
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14 ngx_list_t *list;
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15
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16 list = ngx_palloc(pool, sizeof(ngx_list_t));
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17 if (list == NULL) {
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18 return NULL;
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19 }
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20
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21 list->part.elts = ngx_palloc(pool, n * size);
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22 if (list->part.elts == NULL) {
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23 return NULL;
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24 }
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25
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26 list->part.nelts = 0;
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27 list->part.next = NULL;
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28 list->last = &list->part;
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29 list->size = size;
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30 list->nalloc = n;
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31 list->pool = pool;
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32
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33 return list;
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34 }
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35
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36
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37 void *
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38 ngx_list_push(ngx_list_t *l)
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39 {
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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40 void *elt;
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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41 ngx_list_part_t *last;
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43 last = l->last;
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388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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45 if (last->nelts == l->nalloc) {
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388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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47 /* the last part is full, allocate a new list part */
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48
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49 last = ngx_palloc(l->pool, sizeof(ngx_list_part_t));
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50 if (last == NULL) {
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51 return NULL;
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52 }
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53
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54 last->elts = ngx_palloc(l->pool, l->nalloc * l->size);
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55 if (last->elts == NULL) {
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56 return NULL;
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57 }
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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59 last->nelts = 0;
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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60 last->next = NULL;
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61
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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62 l->last->next = last;
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63 l->last = last;
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64 }
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388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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66 elt = (char *) last->elts + l->size * last->nelts;
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67 last->nelts++;
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68
388a842cbbe1 nginx-0.0.10-2004-09-03-19:50:30 import
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69 return elt;
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70 }