87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
// 2002-01-23 Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
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// Adpated from libstdc++/5444 submitted by markus.breuer@materna.de
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//
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// Copyright (C) 2002-2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-do run }
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// { dg-options "-pthread" }
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// { dg-require-effective-target pthread }
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#include <string>
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#include <map>
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#include <vector>
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#include <pthread.h>
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const int max_thread_count = 8;
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const int loops = 100000;
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const char* my_default = "Hallo Welt!";
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const std::size_t upper_limit = 2500;
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const std::size_t lower_limit = 1000;
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typedef char charT;
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typedef std::string String;
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typedef String MyType;
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void*
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thread_main (void*)
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{
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typedef std::map<unsigned int,MyType> Map;
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typedef Map::value_type Value_Pair;
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Map myMap;
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for (int loop = 0; loop < loops; loop++)
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{
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String& str = myMap[loop];
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str.append (my_default);
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myMap.insert (Value_Pair (loop, str));
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if (myMap.size () > upper_limit)
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{
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while (myMap.size () > lower_limit)
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{
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Map::iterator it = myMap.begin ();
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myMap.erase (it);
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}
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}
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}
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return 0;
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}
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int
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main (void)
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{
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pthread_t tid[max_thread_count];
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#if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
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pthread_setconcurrency (max_thread_count);
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#endif
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for (int i = 0; i < max_thread_count; i++)
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pthread_create (&tid[i], 0, thread_main, 0);
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for (int i = 0; i < max_thread_count; i++)
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pthread_join (tid[i], 0);
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return 0;
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}
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