1 /*
2 * File: condvar6.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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
33 *
34 * --------------------------------------------------------------------------
35 *
36 * Test Synopsis:
37 * - Test pthread_cond_broadcast.
38 *
39 * Test Method (Validation or Falsification):
40 * - Validation
41 *
42 * Requirements Tested:
43 * -
44 *
45 * Features Tested:
46 * -
47 *
48 * Cases Tested:
49 * -
50 *
51 * Description:
52 * - Test broadcast with NUMTHREADS (=5) waiting CVs.
53 *
54 * Environment:
55 * -
56 *
57 * Input:
58 * - None.
59 *
60 * Output:
61 * - File name, Line number, and failed expression on failure.
62 * - No output on success.
63 *
64 * Assumptions:
65 * -
66 *
67 * Pass Criteria:
68 * - Process returns zero exit status.
69 *
70 * Fail Criteria:
71 * - Process returns non-zero exit status.
72 */
73
74 #include "test.h"
75 #include <sys/timeb.h>
76
77 /*
78 * Create NUMTHREADS threads in addition to the Main thread.
79 */
80 enum {
81 NUMTHREADS = 5
82 };
83
84 typedef struct bag_t_ bag_t;
85 struct bag_t_ {
86 int threadnum;
87 int started;
88 /* Add more per-thread state variables here */
89 };
90
91 static bag_t threadbag[NUMTHREADS + 1];
92
93 typedef struct cvthing_t_ cvthing_t;
94
95 struct cvthing_t_ {
96 pthread_cond_t notbusy;
97 pthread_mutex_t lock;
98 int shared;
99 };
100
101 static cvthing_t cvthing = {
102 PTHREAD_COND_INITIALIZER,
103 PTHREAD_MUTEX_INITIALIZER,
104 0
105 };
106
107 static pthread_mutex_t start_flag = PTHREAD_MUTEX_INITIALIZER;
108
109 static struct timespec abstime = { 0, 0 };
110
111 static int awoken;
112
113 void *
mythread(void * arg)114 mythread(void * arg)
115 {
116 bag_t * bag = (bag_t *) arg;
117
118 assert(bag == &threadbag[bag->threadnum]);
119 assert(bag->started == 0);
120 bag->started = 1;
121
122 /* Wait for the start gun */
123 assert(pthread_mutex_lock(&start_flag) == 0);
124 assert(pthread_mutex_unlock(&start_flag) == 0);
125
126 assert(pthread_mutex_lock(&cvthing.lock) == 0);
127
128 while (! (cvthing.shared > 0))
129 assert(pthread_cond_timedwait(&cvthing.notbusy, &cvthing.lock, &abstime) == 0);
130
131 assert(cvthing.shared > 0);
132
133 awoken++;
134
135 assert(pthread_mutex_unlock(&cvthing.lock) == 0);
136
137 return (void *) 0;
138 }
139
140 int
main()141 main()
142 {
143 int failed = 0;
144 int i;
145 pthread_t t[NUMTHREADS + 1];
146
147 PTW32_STRUCT_TIMEB currSysTime;
148 const DWORD NANOSEC_PER_MILLISEC = 1000000;
149
150 cvthing.shared = 0;
151
152 assert((t[0] = pthread_self()).p != NULL);
153
154 assert(cvthing.notbusy == PTHREAD_COND_INITIALIZER);
155
156 assert(cvthing.lock == PTHREAD_MUTEX_INITIALIZER);
157
158 assert(pthread_mutex_lock(&start_flag) == 0);
159
160 PTW32_FTIME(&currSysTime);
161
162 abstime.tv_sec = (long)currSysTime.time;
163 abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm;
164
165 abstime.tv_sec += 5;
166
167 assert((t[0] = pthread_self()).p != NULL);
168
169 awoken = 0;
170
171 for (i = 1; i <= NUMTHREADS; i++)
172 {
173 threadbag[i].started = 0;
174 threadbag[i].threadnum = i;
175 assert(pthread_create(&t[i], NULL, mythread, (void *) &threadbag[i]) == 0);
176 }
177
178 /*
179 * Code to control or munipulate child threads should probably go here.
180 */
181
182 assert(pthread_mutex_unlock(&start_flag) == 0);
183
184 /*
185 * Give threads time to start.
186 */
187 Sleep(1000);
188
189 assert(pthread_mutex_lock(&cvthing.lock) == 0);
190 cvthing.shared++;
191 assert(pthread_mutex_unlock(&cvthing.lock) == 0);
192
193 assert(pthread_cond_broadcast(&cvthing.notbusy) == 0);
194
195 /*
196 * Give threads time to complete.
197 */
198 for (i = 1; i <= NUMTHREADS; i++)
199 {
200 assert(pthread_join(t[i], NULL) == 0);
201 }
202
203 /*
204 * Cleanup the CV.
205 */
206
207 assert(pthread_mutex_destroy(&cvthing.lock) == 0);
208
209 assert(cvthing.lock == NULL);
210
211 assert(pthread_cond_destroy(&cvthing.notbusy) == 0);
212
213 assert(cvthing.notbusy == NULL);
214
215 /*
216 * Standard check that all threads started.
217 */
218 for (i = 1; i <= NUMTHREADS; i++)
219 {
220 failed = !threadbag[i].started;
221
222 if (failed)
223 {
224 fprintf(stderr, "Thread %d: started %d\n", i, threadbag[i].started);
225 }
226 }
227
228 assert(!failed);
229
230 /*
231 * Check any results here.
232 */
233
234 assert(awoken == NUMTHREADS);
235
236 /*
237 * Success.
238 */
239 return 0;
240 }
241
242
243