1 /*
2 * barrier6.c
3 *
4 *
5 * --------------------------------------------------------------------------
6 *
7 * Pthreads-win32 - POSIX Threads Library for Win32
8 * Copyright(C) 1998 John E. Bossom
9 * Copyright(C) 1999,2005 Pthreads-win32 contributors
10 *
11 * Contact Email: rpj@callisto.canberra.edu.au
12 *
13 * The current list of contributors is contained
14 * in the file CONTRIBUTORS included with the source
15 * code distribution. The list can also be seen at the
16 * following World Wide Web location:
17 * http://sources.redhat.com/pthreads-win32/contributors.html
18 *
19 * This library is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU Lesser General Public
21 * License as published by the Free Software Foundation; either
22 * version 2 of the License, or (at your option) any later version.
23 *
24 * This library is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * Lesser General Public License for more details.
28 *
29 * You should have received a copy of the GNU Lesser General Public
30 * License along with this library in the file COPYING.LIB;
31 * if not, write to the Free Software Foundation, Inc.,
32 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
33 *
34 * --------------------------------------------------------------------------
35 *
36 * Destroy the barrier after initial count threads are released then let
37 * additional threads attempt to wait on it.
38 *
39 */
40
41 #include "test.h"
42
43 enum {
44 NUMTHREADS = 31
45 };
46
47 pthread_barrier_t barrier = NULL;
48 pthread_mutex_t mx = PTHREAD_MUTEX_INITIALIZER;
49 static int serialThreadCount = 0;
50 static int otherThreadCount = 0;
51
52 void *
func(void * arg)53 func(void * arg)
54 {
55 int result = pthread_barrier_wait(&barrier);
56
57 assert(pthread_mutex_lock(&mx) == 0);
58
59 if (result == PTHREAD_BARRIER_SERIAL_THREAD)
60 {
61 serialThreadCount++;
62 }
63 else if (0 == result)
64 {
65 otherThreadCount++;
66 }
67 assert(pthread_mutex_unlock(&mx) == 0);
68
69 return NULL;
70 }
71
72 int
main()73 main()
74 {
75 int i, j, k;
76 pthread_t t[NUMTHREADS + 1];
77
78 for (j = 1; j <= NUMTHREADS; j++)
79 {
80 int howHigh = j/2 + 1;
81
82 printf("Barrier height = %d, Total threads %d\n", howHigh, j);
83
84 serialThreadCount = 0;
85 otherThreadCount = 0;
86
87 assert(pthread_barrier_init(&barrier, NULL, howHigh) == 0);
88
89 for (i = 1; i <= j; i++)
90 {
91 assert(pthread_create(&t[i], NULL, func, NULL) == 0);
92
93 if (i == howHigh)
94 {
95 for (k = 1; k <= howHigh; k++)
96 {
97 assert(pthread_join(t[k], NULL) == 0);
98 }
99 assert(pthread_barrier_destroy(&barrier) == 0);
100 }
101 }
102
103 for (i = howHigh+1; i <= j; i++)
104 {
105 assert(pthread_join(t[i], NULL) == 0);
106 }
107
108 assert(serialThreadCount == 1);
109 assert(otherThreadCount == (howHigh - 1));
110
111 assert(pthread_barrier_destroy(&barrier) == EINVAL);
112 }
113
114 assert(pthread_mutex_destroy(&mx) == 0);
115
116 return 0;
117 }
118