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There are no tests specifically focused on the functions time, gettimeofday and clock_gettime, although there are some incidental uses in tests of other functions. Add tests specifically for these three functions. Tested for x86_64 and x86.
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/* Test gettimeofday function.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sys/time.h>
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#include <time.h>
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#include <support/check.h>
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#include <support/test-driver.h>
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/* Compare two struct timeval values, returning a value -1, 0 or 1. */
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int
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compare_timeval (const struct timeval *tv1, const struct timeval *tv2)
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{
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if (tv1->tv_sec < tv2->tv_sec)
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return -1;
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if (tv1->tv_sec > tv2->tv_sec)
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return 1;
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if (tv1->tv_usec < tv2->tv_usec)
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return -1;
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if (tv1->tv_usec > tv2->tv_usec)
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return 1;
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return 0;
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}
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int
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do_test (void)
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{
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struct timeval tv1, tv2, tv3;
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int ret;
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time_t t1;
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/* Verify that the calls to gettimeofday succeed, that the time does
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not decrease, and that time returns a truncated (not rounded)
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version of the time. */
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t1 = time (NULL);
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TEST_VERIFY_EXIT (t1 != (time_t) -1);
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ret = gettimeofday (&tv1, NULL);
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TEST_VERIFY_EXIT (ret == 0);
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TEST_VERIFY (t1 <= tv1.tv_sec);
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TEST_VERIFY (tv1.tv_usec >= 0);
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TEST_VERIFY (tv1.tv_usec < 1000000);
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ret = gettimeofday (&tv2, NULL);
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TEST_VERIFY_EXIT (ret == 0);
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TEST_VERIFY (compare_timeval (&tv1, &tv2) <= 0);
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TEST_VERIFY (tv2.tv_usec >= 0);
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TEST_VERIFY (tv2.tv_usec < 1000000);
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/* Also verify that after sleeping, the time returned has increased.
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Repeat several times to verify that each time, the time from the
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time function is truncated not rounded. */
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const struct timespec duration = { .tv_nsec = 100000000 };
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for (int i = 0; i < 10; i++)
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{
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ret = nanosleep (&duration, NULL);
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TEST_VERIFY_EXIT (ret == 0);
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t1 = time (NULL);
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TEST_VERIFY_EXIT (t1 != (time_t) -1);
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ret = gettimeofday (&tv3, NULL);
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TEST_VERIFY_EXIT (ret == 0);
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TEST_VERIFY (compare_timeval (&tv2, &tv3) < 0);
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TEST_VERIFY (t1 <= tv3.tv_sec);
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TEST_VERIFY (tv3.tv_usec >= 0);
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TEST_VERIFY (tv3.tv_usec < 1000000);
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tv2 = tv3;
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}
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/* Also test with the obsolete tz argument not being NULL. */
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struct timezone tz = { 0 };
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t1 = time (NULL);
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TEST_VERIFY_EXIT (t1 != (time_t) -1);
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ret = gettimeofday (&tv3, &tz);
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TEST_VERIFY_EXIT (ret == 0);
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TEST_VERIFY (t1 <= tv3.tv_sec);
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TEST_VERIFY (compare_timeval (&tv2, &tv3) <= 0);
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TEST_VERIFY (tv3.tv_usec >= 0);
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TEST_VERIFY (tv3.tv_usec < 1000000);
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return 0;
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}
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#include <support/test-driver.c>
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