nptl/tst-cancel2.c

   1 /* Copyright (C) 2002-2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <unistd.h>
  23
  24
  25 static int fd[2];
  26
  27
  28 static void *
  29 tf (void *arg)
  30 {
  31   /* The buffer size must be larger than the pipe size so that the
  32      write blocks.  */
  33   char buf[100000];
  34
  35   while (write (fd[1], buf, sizeof (buf)) > 0);
  36
  37   return (void *) 42l;
  38 }
  39
  40
  41 static int
  42 do_test (void)
  43 {
  44   pthread_t th;
  45   void *r;
  46   struct sigaction sa;
  47
  48   sa.sa_handler = SIG_IGN;
  49   sigemptyset (&sa.sa_mask);
  50   sa.sa_flags = 0;
  51
  52   if (sigaction (SIGPIPE, &sa, NULL) != 0)
  53     {
  54       puts ("sigaction failed");
  55       return 1;
  56     }
  57
  58   if (pipe (fd) != 0)
  59     {
  60       puts ("pipe failed");
  61       return 1;
  62     }
  63
  64   if (pthread_create (&th, NULL, tf, NULL) != 0)
  65     {
  66       puts ("create failed");
  67       return 1;
  68     }
  69
  70   if (pthread_cancel (th) != 0)
  71     {
  72       puts ("cancel failed");
  73       return 1;
  74     }
  75
  76   /* This will cause the write in the child to return.  */
  77   close (fd[0]);
  78
  79   if (pthread_join (th, &r) != 0)
  80     {
  81       puts ("join failed");
  82       return 1;
  83     }
  84
  85   if (r != PTHREAD_CANCELED)
  86     {
  87       printf ("result is wrong: expected %p, got %p\n", PTHREAD_CANCELED, r);
  88       return 1;
  89     }
  90
  91   return 0;
  92 }
  93
  94 #define TEST_FUNCTION do_test ()
  95 #include "../test-skeleton.c"