utils.h

   1 /*
   2  * utils - misc libubox utility functions
   3  *
   4  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #ifndef __LIBUBOX_UTILS_H
  20 #define __LIBUBOX_UTILS_H
  21
  22 #include <sys/types.h>
  23
  24 /*
  25  * calloc_a(size_t len, [void **addr, size_t len,...], NULL)
  26  *
  27  * allocate a block of memory big enough to hold multiple aligned objects.
  28  * the pointer to the full object (starting with the first chunk) is returned,
  29  * all other pointers are stored in the locations behind extra addr arguments.
  30  * the last argument needs to be a NULL pointer
  31  */
  32
  33 #define calloc_a(len, ...) __calloc_a(len, ##__VA_ARGS__)
  34
  35 void *__calloc_a(size_t len, ...);
  36
  37 #ifndef ARRAY_SIZE
  38 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
  39 #endif
  40
  41 #endif