release/src/router/nginx/src/core/ngx_array.h

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  * Copyright (C) Nginx, Inc.
   5  */
   6
   7
   8 #ifndef _NGX_ARRAY_H_INCLUDED_
   9 #define _NGX_ARRAY_H_INCLUDED_
  10
  11
  12 #include <ngx_config.h>
  13 #include <ngx_core.h>
  14
  15
  16 typedef struct {
  17     void        *elts;
  18     ngx_uint_t   nelts;
  19     size_t       size;
  20     ngx_uint_t   nalloc;
  21     ngx_pool_t  *pool;
  22 } ngx_array_t;
  23
  24
  25 ngx_array_t *ngx_array_create(ngx_pool_t *p, ngx_uint_t n, size_t size);
  26 void ngx_array_destroy(ngx_array_t *a);
  27 void *ngx_array_push(ngx_array_t *a);
  28 void *ngx_array_push_n(ngx_array_t *a, ngx_uint_t n);
  29
  30
  31 static ngx_inline ngx_int_t
  32 ngx_array_init(ngx_array_t *array, ngx_pool_t *pool, ngx_uint_t n, size_t size)
  33 {
  34     /*
  35      * set "array->nelts" before "array->elts", otherwise MSVC thinks
  36      * that "array->nelts" may be used without having been initialized
  37      */
  38
  39     array->nelts = 0;
  40     array->size = size;
  41     array->nalloc = n;
  42     array->pool = pool;
  43
  44     array->elts = ngx_palloc(pool, n * size);
  45     if (array->elts == NULL) {
  46         return NGX_ERROR;
  47     }
  48
  49     return NGX_OK;
  50 }
  51
  52
  53 #endif /* _NGX_ARRAY_H_INCLUDED_ */