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      1 /*	$NetBSD: timespec_get.c,v 1.3 2025/04/21 08:57:32 nia Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Kamil Rytarowski.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: timespec_get.c,v 1.3 2025/04/21 08:57:32 nia Exp $");
     35 #endif /* !defined lint */
     36 
     37 #include <assert.h>
     38 #include <time.h>
     39 
     40 /* ISO/IEC 9899:201x 7.27.2.5 The timespec_get function */
     41 
     42 int
     43 timespec_get(struct timespec *ts, int base)
     44 {
     45 
     46 	_DIAGASSERT(ts != NULL);
     47 
     48 	switch (base) {
     49 	case TIME_UTC:
     50 		if (clock_gettime(CLOCK_REALTIME, ts) == -1)
     51 			return 0;
     52 		break;
     53 	case TIME_MONOTONIC:
     54 		if (clock_gettime(CLOCK_MONOTONIC, ts) == -1)
     55 			return 0;
     56 		break;
     57 	default:
     58 		return 0;
     59 	}
     60 
     61 	return base;
     62 }
     63