1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
// 2002-01-23 Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
//
// Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2009
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* mips-sgi-irix6* } }
// { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* mips-sgi-irix6* } }
// { dg-options "-pthreads" { target *-*-solaris* } }
// This multi-threading C++/STL/POSIX code adheres to rules outlined here:
// http://www.sgi.com/tech/stl/thread_safety.html
//
// It is believed to exercise the allocation code in a manner that
// should reveal memory leaks (and, under rare cases, race conditions,
// if the STL threading support is fubar'd).
#include <list>
#include <cstdlib>
#include <pthread.h>
const int thread_cycles = 10;
const int thread_pairs = 10;
const unsigned max_size = 100;
const int iters = 10000;
class task_queue
{
typedef std::list<int> list_type;
public:
task_queue ()
{
pthread_mutex_init (&fooLock, NULL);
pthread_cond_init (&fooCond1, NULL);
pthread_cond_init (&fooCond2, NULL);
}
~task_queue ()
{
pthread_mutex_destroy (&fooLock);
pthread_cond_destroy (&fooCond1);
pthread_cond_destroy (&fooCond2);
}
list_type foo;
pthread_mutex_t fooLock;
pthread_cond_t fooCond1;
pthread_cond_t fooCond2;
};
void*
produce(void* t)
{
task_queue& tq = *(static_cast<task_queue*> (t));
int num = 0;
while (num < iters)
{
pthread_mutex_lock (&tq.fooLock);
while (tq.foo.size () >= max_size)
pthread_cond_wait (&tq.fooCond1, &tq.fooLock);
tq.foo.push_back (num++);
pthread_cond_signal (&tq.fooCond2);
pthread_mutex_unlock (&tq.fooLock);
}
return 0;
}
void*
consume(void* t)
{
task_queue& tq = *(static_cast<task_queue*> (t));
int num = 0;
while (num < iters)
{
pthread_mutex_lock (&tq.fooLock);
while (tq.foo.size () == 0)
pthread_cond_wait (&tq.fooCond2, &tq.fooLock);
if (tq.foo.front () != num++)
abort ();
tq.foo.pop_front ();
pthread_cond_signal (&tq.fooCond1);
pthread_mutex_unlock (&tq.fooLock);
}
return 0;
}
int
main()
{
pthread_t prod[thread_pairs];
pthread_t cons[thread_pairs];
task_queue* tq[thread_pairs];
#if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
pthread_setconcurrency (thread_pairs * 2);
#endif
for (int j = 0; j < thread_cycles; j++)
{
for (int i = 0; i < thread_pairs; i++)
{
tq[i] = new task_queue;
pthread_create (&prod[i], NULL, produce, static_cast<void*> (tq[i]));
pthread_create (&cons[i], NULL, consume, static_cast<void*> (tq[i]));
}
for (int i = 0; i < thread_pairs; i++)
{
pthread_join (prod[i], NULL);
pthread_join (cons[i], NULL);
delete tq[i];
}
}
return 0;
}
|
