1  /* Test for sched_rr_get_interval
       2     Copyright (C) 2021-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <time.h>
      20  #include <sched.h>
      21  #include <support/check.h>
      22  
      23  static int
      24  do_test (void)
      25  {
      26    struct timespec ts[2] = { { -1, -1 }, { -1, -1 } };
      27    const struct sched_param param = {
      28      .sched_priority = sched_get_priority_max (SCHED_RR) - 10,
      29    };
      30    int result = sched_setscheduler (0, SCHED_RR, &param);
      31  
      32    if (result != 0)
      33      FAIL_UNSUPPORTED ("sched_setscheduler error: %m\n");
      34  
      35    TEST_COMPARE (sched_rr_get_interval (0, ts), 0);
      36  
      37    /* Check if returned time values are correct.  */
      38    TEST_VERIFY (ts[0].tv_sec >= 0);
      39    TEST_VERIFY (ts[0].tv_nsec >= 0 && ts[0].tv_nsec < 1000000000);
      40    TEST_VERIFY (ts[1].tv_sec == -1 && ts[1].tv_nsec == -1);
      41  
      42    return 0;
      43  }
      44  
      45  #include <support/test-driver.c>