libstdc++-v3/testsuite/23_containers/map/pthread6.cc

   1 // 2002-01-23  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
   2 // Adpated from libstdc++/5444 submitted by markus.breuer@materna.de
   3 //
   4 // Copyright (C) 2002-2025 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 <string>
  26 #include <map>
  27 #include <vector>
  28 #include <pthread.h>
  29
  30 const int max_thread_count = 8;
  31 const int loops = 100000;
  32
  33 const char* my_default = "Hallo Welt!";
  34
  35 const std::size_t upper_limit = 2500;
  36 const std::size_t lower_limit = 1000;
  37
  38 typedef char charT;
  39
  40 typedef std::string String;
  41
  42 typedef String MyType;
  43
  44 void*
  45 thread_main (void*)
  46 {
  47   typedef std::map<unsigned int,MyType> Map;
  48   typedef Map::value_type Value_Pair;
  49   Map myMap;
  50
  51   for (int loop = 0; loop < loops; loop++)
  52     {
  53       String& str = myMap[loop];
  54       str.append (my_default);
  55       myMap.insert (Value_Pair (loop, str));
  56
  57       if (myMap.size () > upper_limit)
  58         {
  59           while (myMap.size () > lower_limit)
  60             {
  61               Map::iterator it = myMap.begin ();
  62               myMap.erase (it);
  63             }
  64         }
  65     }
  66
  67   return 0;
  68 }
  69
  70 int
  71 main (void)
  72 {
  73   pthread_t tid[max_thread_count];
  74
  75 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  76   pthread_setconcurrency (max_thread_count);
  77 #endif
  78
  79   for (int i = 0; i < max_thread_count; i++)
  80     pthread_create (&tid[i], 0, thread_main, 0);
  81
  82   for (int i = 0; i < max_thread_count; i++)
  83     pthread_join (tid[i], 0);
  84
  85   return 0;
  86 }