libstdc++-v3/testsuite/27_io/basic_ostringstream/pthread3.cc

   1 // 2002-01-23  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
   2 // Adpated from libstdc++/5347 submitted by markus.breuer@materna.de
   3 //
   4 // Copyright (C) 2002-2020 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // { dg-do run }
  22 // { dg-options "-pthread"  }
  23 // { dg-require-effective-target pthread }
  24
  25 #include <sstream>
  26 #include <pthread.h>
  27
  28 const int max_thread_count = 2;
  29 const int max_loop_count = 1000000;
  30
  31 void*
  32 thread_main (void *)
  33 {
  34    for (int i = 0; i < max_loop_count; i++)
  35      std::ostringstream oss;
  36
  37    return 0;
  38 }
  39
  40 int
  41 main()
  42 {
  43   pthread_t tid[max_thread_count];
  44
  45 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  46   pthread_setconcurrency (max_thread_count);
  47 #endif
  48
  49   for (int i = 0; i < max_thread_count; i++)
  50     pthread_create (&tid[i], 0, thread_main, 0);
  51
  52   for (int i = 0; i < max_thread_count; i++)
  53     pthread_join (tid[i], 0);
  54
  55   return 0;
  56 }