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timespec_getres.c revision 1.1.4.2 
      1  1.1.4.2  perseant /*	$NetBSD: timespec_getres.c,v 1.1.4.2 2025/08/02 05:54:37 perseant Exp $	*/
      2  1.1.4.2  perseant 
      3  1.1.4.2  perseant /*-
      4  1.1.4.2  perseant  * Copyright (c) 2025 The NetBSD Foundation, Inc.
      5  1.1.4.2  perseant  * All rights reserved.
      6  1.1.4.2  perseant  *
      7  1.1.4.2  perseant  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1.4.2  perseant  * by Nia Alarie.
      9  1.1.4.2  perseant  *
     10  1.1.4.2  perseant  * Redistribution and use in source and binary forms, with or without
     11  1.1.4.2  perseant  * modification, are permitted provided that the following conditions
     12  1.1.4.2  perseant  * are met:
     13  1.1.4.2  perseant  * 1. Redistributions of source code must retain the above copyright
     14  1.1.4.2  perseant  *    notice, this list of conditions and the following disclaimer.
     15  1.1.4.2  perseant  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1.4.2  perseant  *    notice, this list of conditions and the following disclaimer in the
     17  1.1.4.2  perseant  *    documentation and/or other materials provided with the distribution.
     18  1.1.4.2  perseant  *
     19  1.1.4.2  perseant  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1.4.2  perseant  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1.4.2  perseant  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1.4.2  perseant  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1.4.2  perseant  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1.4.2  perseant  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1.4.2  perseant  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1.4.2  perseant  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1.4.2  perseant  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1.4.2  perseant  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1.4.2  perseant  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1.4.2  perseant  */
     31  1.1.4.2  perseant 
     32  1.1.4.2  perseant #include <sys/cdefs.h>
     33  1.1.4.2  perseant #ifndef lint
     34  1.1.4.2  perseant __RCSID("$NetBSD: timespec_getres.c,v 1.1.4.2 2025/08/02 05:54:37 perseant Exp $");
     35  1.1.4.2  perseant #endif /* !defined lint */
     36  1.1.4.2  perseant 
     37  1.1.4.2  perseant #include <assert.h>
     38  1.1.4.2  perseant #include <time.h>
     39  1.1.4.2  perseant 
     40  1.1.4.2  perseant int
     41  1.1.4.2  perseant timespec_getres(struct timespec *ts, int base)
     42  1.1.4.2  perseant {
     43  1.1.4.2  perseant 
     44  1.1.4.2  perseant 	_DIAGASSERT(ts != NULL);
     45  1.1.4.2  perseant 
     46  1.1.4.2  perseant 	switch (base) {
     47  1.1.4.2  perseant 	case TIME_UTC:
     48  1.1.4.2  perseant 		if (clock_getres(CLOCK_REALTIME, ts) == -1)
     49  1.1.4.2  perseant 			return 0;
     50  1.1.4.2  perseant 		break;
     51  1.1.4.2  perseant 	case TIME_MONOTONIC:
     52  1.1.4.2  perseant 		if (clock_getres(CLOCK_MONOTONIC, ts) == -1)
     53  1.1.4.2  perseant 			return 0;
     54  1.1.4.2  perseant 		break;
     55  1.1.4.2  perseant 	default:
     56  1.1.4.2  perseant 		return 0;
     57  1.1.4.2  perseant 	}
     58  1.1.4.2  perseant 
     59  1.1.4.2  perseant 	return base;
     60  1.1.4.2  perseant }
     61