nptl/tst-sem5.c

   1 /* Copyright (C) 2002-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 <errno.h>
  20 #include <semaphore.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <sys/time.h>
  24 #include <support/check.h>
  25 #include <support/timespec.h>
  26 #include <support/xtime.h>
  27
  28 /* A bogus clock value that tells run_test to use sem_timedwait rather than
  29    sem_clockwait.  */
  30 #define CLOCK_USE_TIMEDWAIT (-1)
  31
  32 static void
  33 do_test_clock (clockid_t clockid)
  34 {
  35   const clockid_t clockid_for_get =
  36     clockid == CLOCK_USE_TIMEDWAIT ? CLOCK_REALTIME : clockid;
  37   sem_t s;
  38   struct timespec ts;
  39
  40   TEST_COMPARE (sem_init (&s, 0, 1), 0);
  41   TEST_COMPARE (TEMP_FAILURE_RETRY (sem_wait (&s)), 0);
  42
  43   /* We wait for half a second.  */
  44   xclock_gettime (clockid_for_get, &ts);
  45   ts = timespec_add (ts, make_timespec (0, TIMESPEC_HZ/2));
  46
  47   errno = 0;
  48   TEST_COMPARE (TEMP_FAILURE_RETRY ((clockid == CLOCK_USE_TIMEDWAIT)
  49                                     ? sem_timedwait (&s, &ts)
  50                                     : sem_clockwait (&s, clockid, &ts)), -1);
  51   TEST_COMPARE (errno, ETIMEDOUT);
  52   TEST_TIMESPEC_NOW_OR_AFTER (clockid_for_get, ts);
  53 }
  54
  55 static int do_test (void)
  56 {
  57   do_test_clock (CLOCK_USE_TIMEDWAIT);
  58   do_test_clock (CLOCK_REALTIME);
  59   do_test_clock (CLOCK_MONOTONIC);
  60   return 0;
  61 }
  62
  63 #include <support/test-driver.c>