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) 2002-2015 Free Software Foundation, Inc.
6//
7// This file is part of the GNU ISO C++ Library.  This library is free
8// software; you can redistribute it and/or modify it under the
9// terms of the GNU General Public License as published by the
10// Free Software Foundation; either version 3, or (at your option)
11// any later version.
12//
13// This library is distributed in the hope that it will be useful,
14// but WITHOUT ANY WARRANTY; without even the implied warranty of
15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16// GNU General Public License for more details.
17//
18// You should have received a copy of the GNU General Public License along
19// with this library; see the file COPYING3.  If not see
20// <http://www.gnu.org/licenses/>.
21
22// { dg-do run { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* } }
23// { dg-options "-pthread" { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* } }
24// { dg-options "-pthreads" { target *-*-solaris* } }
25
26#include <string>
27#include <list>
28#include <pthread.h>
29
30using namespace std;
31
32static list<string> foo;
33static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
34static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
35static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
36static unsigned max_size = 10;
37#if defined(__CYGWIN__)
38static int iters = 10000;
39#else
40static int iters = 300000;
41#endif
42
43void*
44produce (void*)
45{
46  for (int num = 0; num < iters; )
47    {
48      string str ("test string");
49
50      pthread_mutex_lock (&fooLock);
51      while (foo.size () >= max_size)
52	pthread_cond_wait (&fooCondOverflow, &fooLock);
53      foo.push_back (str);
54      num++;
55      if (foo.size () >= (max_size / 2))
56	pthread_cond_signal (&fooCondUnderflow);
57      pthread_mutex_unlock (&fooLock);
58    }
59
60  // No more data will ever be written, ensure no fini race
61  pthread_mutex_lock (&fooLock);
62  pthread_cond_signal (&fooCondUnderflow);
63  pthread_mutex_unlock (&fooLock);
64
65  return 0;
66}
67
68void*
69consume (void*)
70{
71  for (int num = 0; num < iters; )
72    {
73      pthread_mutex_lock (&fooLock);
74      while (foo.size () == 0)
75	pthread_cond_wait (&fooCondUnderflow, &fooLock);
76      while (foo.size () > 0)
77	{
78	  string str = foo.back ();
79	  foo.pop_back ();
80	  num++;
81	}
82      pthread_cond_signal (&fooCondOverflow);
83      pthread_mutex_unlock (&fooLock);
84    }
85
86  return 0;
87}
88
89int
90main (void)
91{
92#if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
93  pthread_setconcurrency (2);
94#endif
95
96  pthread_t prod;
97  pthread_create (&prod, 0, produce, 0);
98  pthread_t cons;
99  pthread_create (&cons, 0, consume, 0);
100
101  pthread_join (prod, 0);
102  pthread_join (cons, 0);
103
104  return 0;
105}
106