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 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 2, 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 COPYING.  If not, write to the Free
20// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21// USA.
22
23// { dg-do run { target *-*-openbsd* *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* } }
24// { dg-options "-pthread" { target *-*-openbsd* *-*-freebsd* *-*-netbsd* *-*-linux* } }
25// { dg-options "-pthreads" { target *-*-solaris* } }
26
27#include <string>
28#include <list>
29
30// Do not include <pthread.h> explicitly; if threads are properly
31// configured for the port, then it is picked up free from STL headers.
32
33#if __GTHREADS
34using namespace std;
35
36static list<string> foo;
37static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
38static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
39static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
40static unsigned max_size = 10;
41#if defined(__CYGWIN__)
42static int iters = 10000;
43#else
44static int iters = 300000;
45#endif
46
47void*
48produce (void*)
49{
50  for (int num = 0; num < iters; )
51    {
52      string str ("test string");
53
54      pthread_mutex_lock (&fooLock);
55      while (foo.size () >= max_size)
56	pthread_cond_wait (&fooCondOverflow, &fooLock);
57      foo.push_back (str);
58      num++;
59      if (foo.size () >= (max_size / 2))
60	pthread_cond_signal (&fooCondUnderflow);
61      pthread_mutex_unlock (&fooLock);
62    }
63
64  // No more data will ever be written, ensure no fini race
65  pthread_mutex_lock (&fooLock);
66  pthread_cond_signal (&fooCondUnderflow);
67  pthread_mutex_unlock (&fooLock);
68
69  return 0;
70}
71
72void*
73consume (void*)
74{
75  for (int num = 0; num < iters; )
76    {
77      pthread_mutex_lock (&fooLock);
78      while (foo.size () == 0)
79	pthread_cond_wait (&fooCondUnderflow, &fooLock);
80      while (foo.size () > 0)
81	{
82	  string str = foo.back ();
83	  foo.pop_back ();
84	  num++;
85	}
86      pthread_cond_signal (&fooCondOverflow);
87      pthread_mutex_unlock (&fooLock);
88    }
89
90  return 0;
91}
92
93int
94main (void)
95{
96#if defined(__sun) && defined(__svr4__)
97  pthread_setconcurrency (2);
98#endif
99
100  pthread_t prod;
101  pthread_create (&prod, NULL, produce, NULL);
102  pthread_t cons;
103  pthread_create (&cons, NULL, consume, NULL);
104
105  pthread_join (prod, NULL);
106  pthread_join (cons, NULL);
107
108  return 0;
109}
110#else
111int main (void) {}
112#endif
113