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)                            \
  11     do {                                            \
  12         (a)->adf_lockmax = (a)->adf_lockcount = 0;  \
  13         (a)->adf_excl = 0;(a)->adf_lock = NULL;     \
  14     } while (0)
  15
  16 #define adf_lock_free(a)                                      \
  17     do {                                                      \
  18         int i;                                                \
  19         if ((a)->adf_lock != NULL) {                          \
  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         }                                                     \
  28     } while (0)
  29
  30 #endif /* libatalk/adouble/ad_private.h */