contrib/bind-9.5.2/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
  27 isc_result_t
  28 isc_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 }