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) 2002-2014 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* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* } }
23 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* } }
24 // { dg-options "-pthreads" { target *-*-solaris* } }
25
26 #include <string>
27 #include <list>
28 #include <pthread.h>
29
30 using namespace std;
31
32 static list<string> foo;
33 static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
34 static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
35 static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
36 static unsigned max_size = 10;
37 #if defined(__CYGWIN__)
38 static int iters = 10000;
39 #else
40 static int iters = 300000;
41 #endif
42
43 void*
produce(void *)44 produce (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
68 void*
consume(void *)69 consume (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
89 int
main(void)90 main (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