sysdeps/pthread/tst-eintr2.c

   1 /* Copyright (C) 2003-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   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 <pthread.h>
  21 #include <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <sys/time.h>
  26 #include <support/check.h>
  27 #include <support/timespec.h>
  28 #include <support/xtime.h>
  29
  30 #include "eintr.c"
  31
  32
  33 static pthread_mutex_t m1 = PTHREAD_MUTEX_INITIALIZER;
  34 static pthread_mutex_t m2 = PTHREAD_MUTEX_INITIALIZER;
  35
  36
  37 static void *
  38 tf1 (void *arg)
  39 {
  40   struct timespec ts = timespec_add (xclock_now (CLOCK_REALTIME),
  41                                      make_timespec (10000, 0));
  42
  43   /* This call must never return.  */
  44   int e = pthread_mutex_timedlock (&m1, &ts);
  45   char buf[100];
  46   printf ("tf1: mutex_timedlock returned: %s\n",
  47           strerror_r (e, buf, sizeof (buf)));
  48
  49   exit (1);
  50 }
  51
  52
  53 static void *
  54 tf2 (void *arg)
  55 {
  56   while (1)
  57     {
  58       TEST_COMPARE (pthread_mutex_lock (&m2), 0);
  59       TEST_COMPARE (pthread_mutex_unlock (&m2), 0);
  60
  61       struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
  62       nanosleep (&ts, NULL);
  63     }
  64   return NULL;
  65 }
  66
  67
  68 static int
  69 do_test (void)
  70 {
  71   TEST_COMPARE (pthread_mutex_lock (&m1), 0);
  72
  73   setup_eintr (SIGUSR1, NULL);
  74
  75   char buf[100];
  76   xpthread_create (NULL, tf1, NULL);
  77   xpthread_create (NULL, tf2, NULL);
  78
  79   delayed_exit (3);
  80   /* This call must never return.  */
  81   int e = pthread_mutex_lock (&m1);
  82   printf ("main: mutex_lock returned: %s\n",
  83           strerror_r (e, buf, sizeof (buf)));
  84
  85   return 1;
  86 }
  87
  88 #include <support/test-driver.c>