libstdc++-v3/testsuite/21_strings/basic_string/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, 2009
   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 3, 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 COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* mips-sgi-irix6* } }
  24 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* mips-sgi-irix6* } }
  25 // { dg-options "-pthreads" { target *-*-solaris* } }
  26
  27 #include <string>
  28 #include <list>
  29 #include <pthread.h>
  30
  31 using namespace std;
  32
  33 static list<string> foo;
  34 static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
  35 static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
  36 static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
  37 static unsigned max_size = 10;
  38 #if defined(__CYGWIN__)
  39 static int iters = 10000;
  40 #else
  41 static int iters = 300000;
  42 #endif
  43
  44 void*
  45 produce (void*)
  46 {
  47   for (int num = 0; num < iters; )
  48     {
  49       string str ("test string");
  50
  51       pthread_mutex_lock (&fooLock);
  52       while (foo.size () >= max_size)
  53         pthread_cond_wait (&fooCondOverflow, &fooLock);
  54       foo.push_back (str);
  55       num++;
  56       if (foo.size () >= (max_size / 2))
  57         pthread_cond_signal (&fooCondUnderflow);
  58       pthread_mutex_unlock (&fooLock);
  59     }
  60
  61   // No more data will ever be written, ensure no fini race
  62   pthread_mutex_lock (&fooLock);
  63   pthread_cond_signal (&fooCondUnderflow);
  64   pthread_mutex_unlock (&fooLock);
  65
  66   return 0;
  67 }
  68
  69 void*
  70 consume (void*)
  71 {
  72   for (int num = 0; num < iters; )
  73     {
  74       pthread_mutex_lock (&fooLock);
  75       while (foo.size () == 0)
  76         pthread_cond_wait (&fooCondUnderflow, &fooLock);
  77       while (foo.size () > 0)
  78         {
  79           string str = foo.back ();
  80           foo.pop_back ();
  81           num++;
  82         }
  83       pthread_cond_signal (&fooCondOverflow);
  84       pthread_mutex_unlock (&fooLock);
  85     }
  86
  87   return 0;
  88 }
  89
  90 int
  91 main (void)
  92 {
  93 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  94   pthread_setconcurrency (2);
  95 #endif
  96
  97   pthread_t prod;
  98   pthread_create (&prod, NULL, produce, NULL);
  99   pthread_t cons;
 100   pthread_create (&cons, NULL, consume, NULL);
 101
 102   pthread_join (prod, NULL);
 103   pthread_join (cons, NULL);
 104
 105   return 0;
 106 }