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src/core/ngx_list.c - nginx-1.7.10

Functions defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #include <ngx_config.h>
  9. #include <ngx_core.h>


  12. ngx_list_t *
  13. ‌ngx_list_create(ngx_pool_t *pool, ngx_uint_t n, size_t size)
  14. {
  15.     ngx_list_t  *list;

  17.     list = ngx_palloc(pool, sizeof(ngx_list_t));
  18.     if (list == NULL) {
  19.         return NULL;
  20.     }

  22.     if (ngx_list_init(list, pool, n, size) != NGX_OK) {
  23.         return NULL;
  24.     }

  26.     return list;
  27. }


  30. void *
  31. ‌ngx_list_push(ngx_list_t *l)
  32. {
  33.     void             *elt;
  34.     ngx_list_part_t  *last;

  36.     last = l->last;

  38.     if (last->nelts == l->nalloc) {

  40.         /* the last part is full, allocate a new list part */

  42.         last = ngx_palloc(l->pool, sizeof(ngx_list_part_t));
  43.         if (last == NULL) {
  44.             return NULL;
  45.         }

  47.         last->elts = ngx_palloc(l->pool, l->nalloc * l->size);
  48.         if (last->elts == NULL) {
  49.             return NULL;
  50.         }

  52.         last->nelts = 0;
  53.         last->next = NULL;

  55.         l->last->next = last;
  56.         l->last = last;
  57.     }

  59.     elt = (char *) last->elts + l->size * last->nelts;
  60.     last->nelts++;

  62.     return elt;
  63. }

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