xref: /openbsd-src/gnu/lib/libstdc++/libstdc++/testsuite/thread/pthread4.cc (revision ae44bc93cdc3e99800494195f6559488456acd2d)
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
34 using namespace std;
35 
36 static list<string> foo;
37 static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
38 static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
39 static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
40 static unsigned max_size = 10;
41 #if defined(__CYGWIN__)
42 static int iters = 10000;
43 #else
44 static int iters = 300000;
45 #endif
46 
47 void*
produce(void *)48 produce (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 
72 void*
consume(void *)73 consume (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 
93 int
main(void)94 main (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
main(void)111 int main (void) {}
112 #endif
113