git.sur5r.net Git - i3/i3/blob - i3bar/include/util.h

   1 #ifndef UTIL_H_
   2 #define UTIL_H_
   3
   4 #include "queue.h"
   5
   6 /* Securely free p */
   7 #define FREE(p) do { \
   8         if (p != NULL) { \
   9                 free(p); \
  10                 p = NULL; \
  11         } \
  12 } while (0)
  13
  14 /* Securely fee single-linked list */
  15 #define FREE_SLIST(l, type) do { \
  16         type *walk = SLIST_FIRST(l); \
  17         while (!SLIST_EMPTY(l)) { \
  18                 SLIST_REMOVE_HEAD(l, slist); \
  19                 FREE(walk); \
  20                 walk = SLIST_FIRST(l); \
  21         } \
  22 } while (0)
  23
  24 #endif
  25
  26 /* Securely fee tail-queues */
  27 #define FREE_TAILQ(l, type) do { \
  28         type *walk = TAILQ_FIRST(l); \
  29         while (!TAILQ_EMPTY(l)) { \
  30                 TAILQ_REMOVE(l, TAILQ_FIRST(l), tailq); \
  31                 FREE(walk); \
  32                 walk = TAILQ_FIRST(l); \
  33         } \
  34 } while (0)