libstdc++-v3/testsuite/thread/pthread4.cc

   1 // 2002-01-23  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
   2 // Adapted from http://gcc.gnu.org/ml/gcc-bugs/2002-01/msg00679.html
   3 // which was adapted from pthread1.cc by Mike Lu <MLu@dynamicsoft.com>
   4 //
   5 // Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
   6 // Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 2, or (at your option)
  12 // any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING.  If not, write to the Free
  21 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  22 // USA.
  23
  24 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* mips-sgi-irix6* } }
  25 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* mips-sgi-irix6* } }
  26 // { dg-options "-pthreads" { target *-*-solaris* } }
  27
  28 #include <string>
  29 #include <list>
  30 #include <pthread.h>
  31
  32 using namespace std;
  33
  34 static list<string> foo;
  35 static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
  36 static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
  37 static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
  38 static unsigned max_size = 10;
  39 #if defined(__CYGWIN__)
  40 static int iters = 10000;
  41 #else
  42 static int iters = 300000;
  43 #endif
  44
  45 void*
  46 produce (void*)
  47 {
  48   for (int num = 0; num < iters; )
  49     {
  50       string str ("test string");
  51
  52       pthread_mutex_lock (&fooLock);
  53       while (foo.size () >= max_size)
  54         pthread_cond_wait (&fooCondOverflow, &fooLock);
  55       foo.push_back (str);
  56       num++;
  57       if (foo.size () >= (max_size / 2))
  58         pthread_cond_signal (&fooCondUnderflow);
  59       pthread_mutex_unlock (&fooLock);
  60     }
  61
  62   // No more data will ever be written, ensure no fini race
  63   pthread_mutex_lock (&fooLock);
  64   pthread_cond_signal (&fooCondUnderflow);
  65   pthread_mutex_unlock (&fooLock);
  66
  67   return 0;
  68 }
  69
  70 void*
  71 consume (void*)
  72 {
  73   for (int num = 0; num < iters; )
  74     {
  75       pthread_mutex_lock (&fooLock);
  76       while (foo.size () == 0)
  77         pthread_cond_wait (&fooCondUnderflow, &fooLock);
  78       while (foo.size () > 0)
  79         {
  80           string str = foo.back ();
  81           foo.pop_back ();
  82           num++;
  83         }
  84       pthread_cond_signal (&fooCondOverflow);
  85       pthread_mutex_unlock (&fooLock);
  86     }
  87
  88   return 0;
  89 }
  90
  91 int
  92 main (void)
  93 {
  94 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  95   pthread_setconcurrency (2);
  96 #endif
  97
  98   pthread_t prod;
  99   pthread_create (&prod, NULL, produce, NULL);
 100   pthread_t cons;
 101   pthread_create (&cons, NULL, consume, NULL);
 102
 103   pthread_join (prod, NULL);
 104   pthread_join (cons, NULL);
 105
 106   return 0;
 107 }