sysdeps/pthread/tst-cancel2.c

   1 /* Copyright (C) 2002-2024 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 <pthread.h>
  19 #include <signal.h>
  20 #include <stdio.h>
  21 #include <unistd.h>
  22
  23
  24 static int fd[2];
  25
  26
  27 static void *
  28 tf (void *arg)
  29 {
  30   /* The buffer size must be larger than the pipe size so that the
  31      write blocks.  */
  32   char buf[100000];
  33
  34   while (write (fd[1], buf, sizeof (buf)) > 0);
  35
  36   return (void *) 42l;
  37 }
  38
  39
  40 static int
  41 do_test (void)
  42 {
  43   pthread_t th;
  44   void *r;
  45   struct sigaction sa;
  46
  47   sa.sa_handler = SIG_IGN;
  48   sigemptyset (&sa.sa_mask);
  49   sa.sa_flags = 0;
  50
  51   if (sigaction (SIGPIPE, &sa, NULL) != 0)
  52     {
  53       puts ("sigaction failed");
  54       return 1;
  55     }
  56
  57   if (pipe (fd) != 0)
  58     {
  59       puts ("pipe failed");
  60       return 1;
  61     }
  62
  63   if (pthread_create (&th, NULL, tf, NULL) != 0)
  64     {
  65       puts ("create failed");
  66       return 1;
  67     }
  68
  69   if (pthread_cancel (th) != 0)
  70     {
  71       puts ("cancel failed");
  72       return 1;
  73     }
  74
  75   /* This will cause the write in the child to return.  */
  76   close (fd[0]);
  77
  78   if (pthread_join (th, &r) != 0)
  79     {
  80       puts ("join failed");
  81       return 1;
  82     }
  83
  84   if (r != PTHREAD_CANCELED)
  85     {
  86       printf ("result is wrong: expected %p, got %p\n", PTHREAD_CANCELED, r);
  87       return 1;
  88     }
  89
  90   return 0;
  91 }
  92
  93 #define TEST_FUNCTION do_test ()
  94 #include "../test-skeleton.c"