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t_timespec_get.c revision 1.1.4.2 
      1 /*-
      2  * Copyright (c) 2025 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Nia Alarie.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <atf-c.h>
     31 
     32 #include <limits.h>
     33 #include <time.h>
     34 
     35 ATF_TC(timespec_getres);
     36 ATF_TC_HEAD(timespec_getres, tc)
     37 {
     38 	atf_tc_set_md_var(tc, "descr", "Resolution tests for timespec_getres");
     39 }
     40 
     41 ATF_TC_BODY(timespec_getres, tc)
     42 {
     43 	struct timespec ts, ts2;
     44 
     45 	ATF_REQUIRE_EQ(timespec_getres(&ts, TIME_MONOTONIC), TIME_MONOTONIC);
     46 	ATF_REQUIRE_EQ(clock_getres(CLOCK_MONOTONIC, &ts2), 0);
     47 
     48 	ATF_REQUIRE_EQ(ts.tv_sec, ts2.tv_sec);
     49 	ATF_REQUIRE_EQ(ts.tv_nsec, ts2.tv_nsec);
     50 
     51 	ATF_REQUIRE_EQ(timespec_getres(&ts, TIME_UTC), TIME_UTC);
     52 	ATF_REQUIRE_EQ(clock_getres(CLOCK_REALTIME, &ts2), 0);
     53 
     54 	ATF_REQUIRE_EQ(ts.tv_sec, ts2.tv_sec);
     55 	ATF_REQUIRE_EQ(ts.tv_nsec, ts2.tv_nsec);
     56 
     57 	/* now an invalid value */
     58 	ATF_REQUIRE_EQ(timespec_getres(&ts, INT_MAX), 0);
     59 }
     60 
     61 ATF_TC(timespec_get);
     62 ATF_TC_HEAD(timespec_get, tc)
     63 {
     64 	atf_tc_set_md_var(tc, "descr", "Basic tests for timespec_get");
     65 }
     66 
     67 ATF_TC_BODY(timespec_get, tc)
     68 {
     69 	struct timespec ts, ts2;
     70 
     71 	ATF_REQUIRE_EQ(timespec_get(&ts, TIME_UTC), TIME_UTC);
     72 	ATF_REQUIRE_EQ(clock_gettime(CLOCK_REALTIME, &ts2), 0);
     73 
     74 	/*
     75 	 * basically test that these clocks (which should be the same source)
     76 	 * aren't too wildly apart...
     77 	 */
     78 
     79 	if (ts2.tv_sec >= ts.tv_sec) {
     80 		ATF_REQUIRE((ts2.tv_sec - ts.tv_sec) < 86400);
     81 	} else {
     82 		ATF_REQUIRE((ts.tv_sec - ts2.tv_sec) < 86400);
     83 	}
     84 
     85 	/* now an invalid value */
     86 	ATF_REQUIRE_EQ(timespec_get(&ts, INT_MAX), 0);
     87 }
     88 
     89 ATF_TC(timespec_get_monotonic);
     90 ATF_TC_HEAD(timespec_get_monotonic, tc)
     91 {
     92 	atf_tc_set_md_var(tc, "descr", "Monotonic tests for timespec_getres");
     93 }
     94 
     95 ATF_TC_BODY(timespec_get_monotonic, tc)
     96 {
     97 	struct timespec ts, ts2;
     98 
     99 	ATF_REQUIRE_EQ(timespec_get(&ts, TIME_MONOTONIC), TIME_MONOTONIC);
    100 	ATF_REQUIRE_EQ(clock_gettime(CLOCK_MONOTONIC, &ts2), 0);
    101 
    102 	/*
    103 	 * basically test that these clocks (which should be the same source)
    104 	 * aren't too wildly apart...
    105 	 */
    106 
    107 	ATF_REQUIRE(ts2.tv_sec >= ts.tv_sec);
    108 	ATF_REQUIRE((ts2.tv_sec - ts.tv_sec) < 86400);
    109 
    110 	/* test that it's actually monotonic */
    111 	ATF_REQUIRE_EQ(timespec_get(&ts2, TIME_MONOTONIC), TIME_MONOTONIC);
    112 	ATF_REQUIRE(ts2.tv_sec >= ts.tv_sec);
    113 }
    114 
    115 ATF_TP_ADD_TCS(tp)
    116 {
    117 	ATF_TP_ADD_TC(tp, timespec_getres);
    118 	ATF_TP_ADD_TC(tp, timespec_get);
    119 	ATF_TP_ADD_TC(tp, timespec_get_monotonic);
    120 
    121 	return atf_no_error();
    122 }
    123 
    124