libstdc++-v3/testsuite/thread/pthread1.cc

   1 // 2002-01-23  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
   2 //
   3 // Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* } }
  22 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* } }
  23 // { dg-options "-pthreads" { target *-*-solaris* } }
  24
  25 // This multi-threading C++/STL/POSIX code adheres to rules outlined here:
  26 // http://www.sgi.com/tech/stl/thread_safety.html
  27 //
  28 // It is believed to exercise the allocation code in a manner that
  29 // should reveal memory leaks (and, under rare cases, race conditions,
  30 // if the STL threading support is fubar'd).
  31
  32 #include <list>
  33
  34 // Do not include <pthread.h> explicitly; if threads are properly
  35 // configured for the port, then it is picked up free from STL headers.
  36
  37 using namespace std;
  38
  39 const int thread_cycles = 10;
  40 const int thread_pairs = 10;
  41 const unsigned max_size = 100;
  42 const int iters = 10000;
  43
  44 class task_queue
  45 {
  46 public:
  47   task_queue ()
  48   {
  49     pthread_mutex_init (&fooLock, NULL);
  50     pthread_cond_init (&fooCond1, NULL);
  51     pthread_cond_init (&fooCond2, NULL);
  52   }
  53   ~task_queue ()
  54   {
  55     pthread_mutex_destroy (&fooLock);
  56     pthread_cond_destroy (&fooCond1);
  57     pthread_cond_destroy (&fooCond2);
  58   }
  59   list<int> foo;
  60   pthread_mutex_t fooLock;
  61   pthread_cond_t fooCond1;
  62   pthread_cond_t fooCond2;
  63 };
  64
  65 void*
  66 produce (void* t)
  67 {
  68   task_queue& tq = *(static_cast<task_queue*> (t));
  69   int num = 0;
  70   while (num < iters)
  71     {
  72       pthread_mutex_lock (&tq.fooLock);
  73       while (tq.foo.size () >= max_size)
  74         pthread_cond_wait (&tq.fooCond1, &tq.fooLock);
  75       tq.foo.push_back (num++);
  76       pthread_cond_signal (&tq.fooCond2);
  77       pthread_mutex_unlock (&tq.fooLock);
  78     }
  79   return 0;
  80 }
  81
  82 void*
  83 consume (void* t)
  84 {
  85   task_queue& tq = *(static_cast<task_queue*> (t));
  86   int num = 0;
  87   while (num < iters)
  88     {
  89       pthread_mutex_lock (&tq.fooLock);
  90       while (tq.foo.size () == 0)
  91         pthread_cond_wait (&tq.fooCond2, &tq.fooLock);
  92       if (tq.foo.front () != num++)
  93         abort ();
  94       tq.foo.pop_front ();
  95       pthread_cond_signal (&tq.fooCond1);
  96       pthread_mutex_unlock (&tq.fooLock);
  97     }
  98   return 0;
  99 }
 100
 101 #if !__GXX_WEAK__ && _MT_ALLOCATOR_H
 102 // Explicitly instantiate for systems with no COMDAT or weak support.
 103 template class __gnu_cxx::__mt_alloc<std::_List_node<int> >;
 104 #endif
 105
 106 int
 107 main ()
 108 {
 109   pthread_t prod[thread_pairs];
 110   pthread_t cons[thread_pairs];
 111
 112   task_queue* tq[thread_pairs];
 113
 114 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
 115   pthread_setconcurrency (thread_pairs * 2);
 116 #endif
 117
 118   for (int j = 0; j < thread_cycles; j++)
 119     {
 120       for (int i = 0; i < thread_pairs; i++)
 121         {
 122           tq[i] = new task_queue;
 123           pthread_create (&prod[i], NULL, produce, static_cast<void*> (tq[i]));
 124           pthread_create (&cons[i], NULL, consume, static_cast<void*> (tq[i]));
 125         }
 126
 127       for (int i = 0; i < thread_pairs; i++)
 128         {
 129           pthread_join (prod[i], NULL);
 130           pthread_join (cons[i], NULL);
 131           delete tq[i];
 132         }
 133     }
 134
 135   return 0;
 136 }