sysdeps/pthread/tst-sem5.c

   1 /* Copyright (C) 2002-2021 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>