libatalk/adouble/ad_lock.h

   1 #ifndef LIBATALK_ADOUBLE_AD_PRIVATE_H
   2 #define LIBATALK_ADOUBLE_AD_PRIVATE_H 1
   3
   4 #include <atalk/adouble.h>
   5
   6 /* this is so that we can keep lists of fds referencing the same file
   7  * around. that way, we can honor locks created by the same process
   8  * with the same file. */
   9
  10 #define adf_lock_init(a) do {   \
  11         (a)->adf_lockmax = 0;   \
  12         (a)->adf_lockcount = 0; \
  13         (a)->adf_lock = NULL;   \
  14     } while (0)
  15
  16 #define adf_lock_free(a) do {                                 \
  17         int i;                                                \
  18         if (!(a)->adf_lock)                                   \
  19             break;                                            \
  20         for (i = 0; i < (a)->adf_lockcount; i++) {            \
  21             adf_lock_t *lock = (a)->adf_lock + i;             \
  22             if (--(*lock->refcount) < 1)                      \
  23                 free(lock->refcount);                         \
  24         }                                                     \
  25         free((a)->adf_lock);                                  \
  26         adf_lock_init(a);                                     \
  27     } while (0)
  28
  29 #endif /* libatalk/adouble/ad_private.h */