sysdeps/pthread/tst-basic3.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 <pthread.h>
  19 #include <signal.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23
  24
  25 static int nrunning = 1;
  26
  27
  28 static void
  29 final_test (void)
  30 {
  31   puts ("final_test has been called");
  32
  33 #define THE_SIGNAL SIGUSR1
  34   kill (getpid (), SIGUSR1);
  35 }
  36
  37
  38 static void *
  39 tf (void *a)
  40 {
  41   if (pthread_join ((pthread_t) a, NULL) != 0)
  42     {
  43       printf ("join failed while %d are running\n", nrunning);
  44       _exit (1);
  45     }
  46
  47   printf ("%2d left\n", --nrunning);
  48
  49   return NULL;
  50 }
  51
  52
  53 int
  54 do_test (void)
  55 {
  56 #define N 20
  57   pthread_t t[N];
  58   pthread_t last = pthread_self ();
  59   int i;
  60
  61   atexit (final_test);
  62
  63   printf ("starting %d + 1 threads\n", N);
  64   for (i = 0; i < N; ++i)
  65     {
  66       if (pthread_create (&t[i], NULL, tf, (void *) last) != 0)
  67         {
  68           puts ("create failed");
  69           _exit (1);
  70         }
  71
  72       ++nrunning;
  73
  74       last = t[i];
  75     }
  76
  77   printf ("%2d left\n", --nrunning);
  78
  79   pthread_exit (NULL);
  80 }
  81
  82
  83 #define EXPECTED_SIGNAL THE_SIGNAL
  84 #define TEST_FUNCTION do_test ()
  85 #include "../test-skeleton.c"