1  /* Copyright (C) 2002-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <semaphore.h>
      20  #include <time.h>
      21  #include <unistd.h>
      22  #include <sys/time.h>
      23  #include <support/check.h>
      24  #include <support/timespec.h>
      25  #include <support/xtime.h>
      26  
      27  /* A bogus clock value that tells run_test to use sem_timedwait rather than
      28     sem_clockwait.  */
      29  #define CLOCK_USE_TIMEDWAIT (-1)
      30  
      31  static void
      32  do_test_clock (clockid_t clockid)
      33  {
      34    const clockid_t clockid_for_get =
      35      clockid == CLOCK_USE_TIMEDWAIT ? CLOCK_REALTIME : clockid;
      36    sem_t s;
      37    struct timespec ts;
      38  
      39    TEST_COMPARE (sem_init (&s, 0, 1), 0);
      40    TEST_COMPARE (TEMP_FAILURE_RETRY (sem_wait (&s)), 0);
      41  
      42    /* We wait for half a second.  */
      43    xclock_gettime (clockid_for_get, &ts);
      44    ts = timespec_add (ts, make_timespec (0, TIMESPEC_HZ/2));
      45  
      46    errno = 0;
      47    TEST_COMPARE (TEMP_FAILURE_RETRY ((clockid == CLOCK_USE_TIMEDWAIT)
      48                                      ? sem_timedwait (&s, &ts)
      49                                      : sem_clockwait (&s, clockid, &ts)), -1);
      50    TEST_COMPARE (errno, ETIMEDOUT);
      51    TEST_TIMESPEC_NOW_OR_AFTER (clockid_for_get, ts);
      52  }
      53  
      54  static int do_test (void)
      55  {
      56    do_test_clock (CLOCK_USE_TIMEDWAIT);
      57    do_test_clock (CLOCK_REALTIME);
      58    do_test_clock (CLOCK_MONOTONIC);
      59    return 0;
      60  }
      61  
      62  #include <support/test-driver.c>