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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include "ref.h"
void ref_init(ref_t *p, ref_destructor_t dtor)
{
if (p) {
p->count = 0;
p->dtor = dtor;
}
}
void ref_retain(ref_t *p)
{
if (p) {
__sync_add_and_fetch(&p->count, 1);
}
}
void ref_release(ref_t *p)
{
if (p) {
int rc = __sync_sub_and_fetch(&p->count, 1);
if (rc == 0 && p->dtor) {
p->dtor(p);
}
}
}
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