sysdeps/pthread/tst-eintr2.c

   1 /* Copyright (C) 2003-2024 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 <pthread.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sys/time.h>
  25 #include <support/check.h>
  26 #include <support/timespec.h>
  27 #include <support/xtime.h>
  28
  29 #include "eintr.c"
  30
  31
  32 static pthread_mutex_t m1 = PTHREAD_MUTEX_INITIALIZER;
  33 static pthread_mutex_t m2 = PTHREAD_MUTEX_INITIALIZER;
  34
  35
  36 static void *
  37 tf1 (void *arg)
  38 {
  39   struct timespec ts = timespec_add (xclock_now (CLOCK_REALTIME),
  40                                      make_timespec (10000, 0));
  41
  42   /* This call must never return.  */
  43   int e = pthread_mutex_timedlock (&m1, &ts);
  44   char buf[100];
  45   printf ("tf1: mutex_timedlock returned: %s\n",
  46           strerror_r (e, buf, sizeof (buf)));
  47
  48   exit (1);
  49 }
  50
  51
  52 static void *
  53 tf2 (void *arg)
  54 {
  55   while (1)
  56     {
  57       TEST_COMPARE (pthread_mutex_lock (&m2), 0);
  58       TEST_COMPARE (pthread_mutex_unlock (&m2), 0);
  59
  60       struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
  61       nanosleep (&ts, NULL);
  62     }
  63   return NULL;
  64 }
  65
  66
  67 static int
  68 do_test (void)
  69 {
  70   TEST_COMPARE (pthread_mutex_lock (&m1), 0);
  71
  72   setup_eintr (SIGUSR1, NULL);
  73
  74   char buf[100];
  75   xpthread_create (NULL, tf1, NULL);
  76   xpthread_create (NULL, tf2, NULL);
  77
  78   delayed_exit (3);
  79   /* This call must never return.  */
  80   int e = pthread_mutex_lock (&m1);
  81   printf ("main: mutex_lock returned: %s\n",
  82           strerror_r (e, buf, sizeof (buf)));
  83
  84   return 1;
  85 }
  86
  87 #include <support/test-driver.c>