tst-clock_nanosleep.c 1.6 KB

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  1. /* Copyright (C) 2003 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #include <errno.h>
  16. #include <stdio.h>
  17. #include <unistd.h>
  18. #include <sys/time.h>
  19. #include <time.h>
  20. /* Test that clock_nanosleep() does sleep. */
  21. static int
  22. do_test (void)
  23. {
  24. /* Current time. */
  25. struct timeval tv1;
  26. (void) gettimeofday (&tv1, NULL);
  27. struct timespec ts;
  28. ts.tv_sec = 1;
  29. ts.tv_nsec = 0;
  30. TEMP_FAILURE_RETRY (clock_nanosleep (CLOCK_REALTIME, 0, &ts, &ts));
  31. /* At least one second must have passed. */
  32. struct timeval tv2;
  33. (void) gettimeofday (&tv2, NULL);
  34. tv2.tv_sec -= tv1.tv_sec;
  35. tv2.tv_usec -= tv1.tv_usec;
  36. if (tv2.tv_usec < 0)
  37. --tv2.tv_sec;
  38. if (tv2.tv_sec < 1)
  39. {
  40. puts ("clock_nanosleep didn't sleep long enough");
  41. return 1;
  42. }
  43. return 0;
  44. }
  45. #define TEST_FUNCTION do_test ()
  46. #include "../test-skeleton.c"