refcount.c

   1 #include "refcount.h"
   2
   3 void refcount_ini(Refcount *refcount, void *obj, SingleCallback del)
   4 {
   5         refcount->obj = obj;
   6         refcount->del = del;
   7         refcount->cnt = 1;
   8         pthread_mutex_init(&refcount->mtx, NULL);
   9 }
  10
  11 void refcount_dst(Refcount *refcount)
  12 {
  13         pthread_mutex_destroy(&refcount->mtx);
  14 }
  15
  16 void *refcount_inc(Refcount *refcount)
  17 {
  18         pthread_mutex_lock(&refcount->mtx);
  19         refcount->cnt++;
  20         pthread_mutex_unlock(&refcount->mtx);
  21         return refcount;
  22 }
  23
  24 void *refcount_grb(Refcount *refcount)
  25 {
  26         return refcount_obj(refcount_inc(refcount));
  27 }
  28
  29 void refcount_drp(Refcount *refcount)
  30 {
  31         pthread_mutex_lock(&refcount->mtx);
  32         unsigned short count = --refcount->cnt;
  33         pthread_mutex_unlock(&refcount->mtx);
  34
  35         if (!count)
  36                 refcount->del(refcount->obj);
  37 }
  38
  39 void *refcount_obj(Refcount *refcount)
  40 {
  41         return refcount->obj;
  42 }