Function put_ref

util/string_ref.c:97–122

Release a reference and free if this is the last holder. * set *ref to NULL so it can no longer access this obj */

 * set *ref to NULL so it can no longer access this obj
 */
void put_ref(struct string_ref **ref_p)
{
    struct string_ref *ref = *ref_p;
    if (ref == NULL)
        return; // nothing to do

    int cnt = ATOMIC_ADD32(ref->cnt, -1);
    if (cnt < 0)
        abort();

    if (cnt == 0) {
#ifdef TRACK_REFERENCES
        Pthread_mutex_lock(&srh_mtx);
        int rc = hash_del(sr_hash, ref);
        if (rc != 0) {
            abort();
        }
        gbl_creation_count -= 1;
        Pthread_mutex_unlock(&srh_mtx);
#else
        ATOMIC_ADD32(gbl_creation_count, -1);
#endif
        free(ref);
    }
    *ref_p = NULL;
}


/* Transfer ownership of the reference from pointer 'from' to 'to'