gnu/dist/gcc4/libstdc++-v3/testsuite/thread/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, 2003, 2005 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 2, 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 COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* } }
  23 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* } }
  24 // { dg-options "-pthreads" { target *-*-solaris* } }
  25
  26 #include <string>
  27 #include <map>
  28 #include <vector>
  29
  30 // Do not include <pthread.h> explicitly; if threads are properly
  31 // configured for the port, then it is picked up free from STL headers.
  32
  33 const int max_thread_count = 8;
  34 const int loops = 100000;
  35
  36 const char* my_default = "Hallo Welt!";
  37
  38 const std::size_t upper_limit = 2500;
  39 const std::size_t lower_limit = 1000;
  40
  41 typedef char charT;
  42
  43 typedef std::string String;
  44
  45 typedef String MyType;
  46
  47 void*
  48 thread_main (void*)
  49 {
  50   typedef std::map<unsigned int,MyType> Map;
  51   typedef Map::value_type Value_Pair;
  52   Map myMap;
  53
  54   for (int loop = 0; loop < loops; loop++)
  55     {
  56       String& str = myMap[loop];
  57       str.append (my_default);
  58       myMap.insert (Value_Pair (loop, str));
  59
  60       if (myMap.size () > upper_limit)
  61         {
  62           while (myMap.size () > lower_limit)
  63             {
  64               Map::iterator it = myMap.begin ();
  65               myMap.erase (it);
  66             }
  67         }
  68     }
  69
  70   return 0;
  71 }
  72
  73 int
  74 main (void)
  75 {
  76   pthread_t tid[max_thread_count];
  77
  78 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  79   pthread_setconcurrency (max_thread_count);
  80 #endif
  81
  82   for (int i = 0; i < max_thread_count; i++)
  83     pthread_create (&tid[i], NULL, thread_main, 0);
  84
  85   for (int i = 0; i < max_thread_count; i++)
  86     pthread_join (tid[i], NULL);
  87
  88   return 0;
  89 }