nptl/tst-cancel15.c

   1 /* Test sem_timedwait cancellation for contended case.
   2    Copyright (C) 2003-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <pthread.h>
  22 #include <semaphore.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/time.h>
  28
  29
  30 static pthread_barrier_t bar;
  31 static sem_t sem;
  32
  33
  34 static void
  35 cleanup (void *arg)
  36 {
  37   static int ncall;
  38
  39   if (++ncall != 1)
  40     {
  41       puts ("second call to cleanup");
  42       exit (1);
  43     }
  44 }
  45
  46
  47 static void *
  48 tf (void *arg)
  49 {
  50   int e;
  51
  52   pthread_cleanup_push (cleanup, NULL);
  53
  54   e = pthread_barrier_wait (&bar);
  55   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  56     {
  57       puts ("error: tf: 1st barrier_wait failed");
  58       exit (1);
  59     }
  60
  61   struct timeval tv;
  62   (void) gettimeofday (&tv, NULL);
  63
  64   struct timespec ts;
  65   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  66
  67   /* Timeout in 5 seconds.  */
  68   ts.tv_sec += 5;
  69
  70   /* This call should block and be cancelable.  */
  71   errno = 0;
  72   e = sem_timedwait (&sem, &ts);
  73
  74   pthread_cleanup_pop (0);
  75
  76   return NULL;
  77 }
  78
  79
  80 static int
  81 do_test (void)
  82 {
  83   pthread_t th;
  84
  85   if (pthread_barrier_init (&bar, NULL, 2) != 0)
  86     {
  87       puts ("error: barrier_init failed");
  88       exit (1);
  89     }
  90
  91   if (sem_init (&sem, 0, 0) != 0)
  92     {
  93       puts ("error: sem_init failed");
  94       exit (1);
  95     }
  96
  97   if (pthread_create (&th, NULL, tf, NULL) != 0)
  98     {
  99       puts ("error: create failed");
 100       exit (1);
 101     }
 102
 103   int e = pthread_barrier_wait (&bar);
 104   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
 105     {
 106       puts ("error: 1st barrier_wait failed");
 107       exit (1);
 108     }
 109
 110   /* Give the child a chance to go to sleep in sem_wait.  */
 111   sleep (1);
 112
 113   /* Check whether cancellation is honored when waiting in sem_timedwait.  */
 114   if (pthread_cancel (th) != 0)
 115     {
 116       puts ("error: 1st cancel failed");
 117       exit (1);
 118     }
 119
 120   void *r;
 121   if (pthread_join (th, &r) != 0)
 122     {
 123       puts ("error: join failed");
 124       exit (1);
 125     }
 126
 127   if (r != PTHREAD_CANCELED)
 128     {
 129       puts ("error: thread not canceled");
 130       exit (1);
 131     }
 132
 133   return 0;
 134 }
 135
 136
 137 #define TEST_FUNCTION do_test ()
 138 #include "../test-skeleton.c"