external/bsd/ntp/dist/lib/isc/refcount.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  11  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  13  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 /* Id: refcount.c,v 1.5 2007/06/19 23:47:17 tbox Exp */
  20
  21 #include <config.h>
  22
  23 #include <stddef.h>
  24
  25 #include <isc/mutex.h>
  26 #include <isc/refcount.h>
  27 #include <isc/result.h>
  28
  29 isc_result_t
  30 isc_refcount_init(isc_refcount_t *ref, unsigned int n) {
  31         REQUIRE(ref != NULL);
  32
  33         ref->refs = n;
  34 #if defined(ISC_PLATFORM_USETHREADS) && !defined(ISC_PLATFORM_HAVEXADD)
  35         return (isc_mutex_init(&ref->lock));
  36 #else
  37         return (ISC_R_SUCCESS);
  38 #endif
  39 }