refcount.c

来自「非常好的dns解析软件」· C语言 代码 · 共 38 行

/*
 * Copyright (C) 2005  Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: refcount.c,v 1.2.2.2 2005/07/25 00:51:46 marka Exp $ */

#include <config.h>

#include <stddef.h>

#include <isc/mutex.h>
#include <isc/refcount.h>
#include <isc/result.h>

isc_result_t
isc_refcount_init(isc_refcount_t *ref, unsigned int n) {
	REQUIRE(ref != NULL);

	ref->refs = n;
#if defined(ISC_PLATFORM_USETHREADS) && !defined(ISC_PLATFORM_HAVEXADD)
	return (isc_mutex_init(&ref->lock));
#else
	return (ISC_R_SUCCESS);
#endif
}