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 #if __GTHREADS
  38 using namespace std;
  39
  40 const int thread_cycles = 10;
  41 const int thread_pairs = 10;
  42 const unsigned max_size = 100;
  43 const int iters = 10000;
  44
  45 class task_queue
  46 {
  47 public:
  48   task_queue ()
  49   {
  50     pthread_mutex_init (&fooLock, NULL);
  51     pthread_cond_init (&fooCond1, NULL);
  52     pthread_cond_init (&fooCond2, NULL);
  53   }
  54   ~task_queue ()
  55   {
  56     pthread_mutex_destroy (&fooLock);
  57     pthread_cond_destroy (&fooCond1);
  58     pthread_cond_destroy (&fooCond2);
  59   }
  60   list<int> foo;
  61   pthread_mutex_t fooLock;
  62   pthread_cond_t fooCond1;
  63   pthread_cond_t fooCond2;
  64 };
  65
  66 void*
  67 produce (void* t)
  68 {
  69   task_queue& tq = *(static_cast<task_queue*> (t));
  70   int num = 0;
  71   while (num < iters)
  72     {
  73       pthread_mutex_lock (&tq.fooLock);
  74       while (tq.foo.size () >= max_size)
  75         pthread_cond_wait (&tq.fooCond1, &tq.fooLock);
  76       tq.foo.push_back (num++);
  77       pthread_cond_signal (&tq.fooCond2);
  78       pthread_mutex_unlock (&tq.fooLock);
  79     }
  80   return 0;
  81 }
  82
  83 void*
  84 consume (void* t)
  85 {
  86   task_queue& tq = *(static_cast<task_queue*> (t));
  87   int num = 0;
  88   while (num < iters)
  89     {
  90       pthread_mutex_lock (&tq.fooLock);
  91       while (tq.foo.size () == 0)
  92         pthread_cond_wait (&tq.fooCond2, &tq.fooLock);
  93       if (tq.foo.front () != num++)
  94         abort ();
  95       tq.foo.pop_front ();
  96       pthread_cond_signal (&tq.fooCond1);
  97       pthread_mutex_unlock (&tq.fooLock);
  98     }
  99   return 0;
 100 }
 101
 102 #if !__GXX_WEAK__ && _MT_ALLOCATOR_H
 103 // Explicitly instantiate for systems with no COMDAT or weak support.
 104 template class __gnu_cxx::__mt_alloc<std::_List_node<int> >;
 105 #endif
 106
 107 int
 108 main ()
 109 {
 110   pthread_t prod[thread_pairs];
 111   pthread_t cons[thread_pairs];
 112
 113   task_queue* tq[thread_pairs];
 114
 115 #if defined(__sun) && defined(__svr4__)
 116   pthread_setconcurrency (thread_pairs * 2);
 117 #endif
 118
 119   for (int j = 0; j < thread_cycles; j++)
 120     {
 121       for (int i = 0; i < thread_pairs; i++)
 122         {
 123           tq[i] = new task_queue;
 124           pthread_create (&prod[i], NULL, produce, static_cast<void*> (tq[i]));
 125           pthread_create (&cons[i], NULL, consume, static_cast<void*> (tq[i]));
 126         }
 127
 128       for (int i = 0; i < thread_pairs; i++)
 129         {
 130           pthread_join (prod[i], NULL);
 131           pthread_join (cons[i], NULL);
 132           delete tq[i];
 133         }
 134     }
 135
 136   return 0;
 137 }
 138 #else
 139 int main (void) {}
 140 #endif