/contrib/bind9/lib/isc/refcount.c

 1/*
 2 * Copyright (C) 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
 3 *
 4 * Permission to use, copy, modify, and/or distribute this software for any
 5 * purpose with or without fee is hereby granted, provided that the above
 6 * copyright notice and this permission notice appear in all copies.
 7 *
 8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
15 */
16
17/* $Id: refcount.c,v 1.5 2007/06/19 23:47:17 tbox Exp $ */
18
19#include <config.h>
20
21#include <stddef.h>
22
23#include <isc/mutex.h>
24#include <isc/refcount.h>
25#include <isc/result.h>
26
27isc_result_t
28isc_refcount_init(isc_refcount_t *ref, unsigned int n) {
29	REQUIRE(ref != NULL);
30
31	ref->refs = n;
32#if defined(ISC_PLATFORM_USETHREADS) && !defined(ISC_PLATFORM_HAVEXADD)
33	return (isc_mutex_init(&ref->lock));
34#else
35	return (ISC_R_SUCCESS);
36#endif
37}