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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* File: condvar9.c
*
*
* Test Synopsis:
* - Test multiple pthread_cond_broadcasts with thread cancelation.
*
* Test Method (Validation or Falsification):
* - Validation
*
* Requirements Tested:
* -
*
* Features Tested:
* -
*
* Cases Tested:
* -
*
* Description:
* - Make NUMTHREADS threads wait on CV, broadcast signal them, cancel them
* and then repeat.
*
* Environment:
* -
*
* Input:
* - None.
*
* Output:
* - File name, Line number, and failed expression on failure.
* - No output on success.
*
* Assumptions:
* -
*
* Pass Criteria:
* - Process returns zero exit status.
*
* Fail Criteria:
* - Process returns non-zero exit status.
*/
#include "test.h"
#include <sys/timeb.h>
/*
* Create NUMTHREADS threads in addition to the Main thread.
*/
enum {
NUMTHREADS = 9
};
typedef struct bag_t_ bag_t;
struct bag_t_ {
int threadnum;
int started;
/* Add more per-thread state variables here */
};
static bag_t threadbag[NUMTHREADS + 1];
typedef struct cvthing_t_ cvthing_t;
struct cvthing_t_ {
pthread_cond_t notbusy;
pthread_mutex_t lock;
int shared;
};
static cvthing_t cvthing = {
PTHREAD_COND_INITIALIZER,
PTHREAD_MUTEX_INITIALIZER,
0
};
static pthread_mutex_t start_flag = PTHREAD_MUTEX_INITIALIZER;
static struct timespec abstime = { 0, 0 };
static int awoken;
static int not_canceled;
static void *
mythread(void * arg)
{
bag_t * bag = (bag_t *) arg;
assert(bag == &threadbag[bag->threadnum]);
assert(bag->started == 0);
bag->started = 1;
/* Wait for the start gun */
assert(pthread_mutex_lock(&start_flag) == 0);
assert(pthread_mutex_unlock(&start_flag) == 0);
assert(pthread_mutex_lock(&cvthing.lock) == 0);
/*
* pthread_cond_timedwait is a cancelation point and we
* going to cancel one deliberately.
*/
#ifdef _MSC_VER
#pragma inline_depth(0)
#endif
pthread_cleanup_push((void *) pthread_mutex_unlock, (void *) &cvthing.lock);
while (! (cvthing.shared > 0))
assert(pthread_cond_timedwait(&cvthing.notbusy, &cvthing.lock, &abstime) == 0);
assert(cvthing.shared > 0);
awoken++;
pthread_testcancel();
pthread_cleanup_pop(0);
#ifdef _MSC_VER
#pragma inline_depth()
#endif
not_canceled++;
assert(pthread_mutex_unlock(&cvthing.lock) == 0);
return (void *) 0;
}
int
main()
{
int failed = 0;
int i;
int first, last;
pthread_t t[NUMTHREADS + 1];
struct timeb currSysTime;
const DWORD NANOSEC_PER_MILLISEC = 1000000;
assert((t[0] = pthread_self()) != NULL);
assert(cvthing.notbusy == PTHREAD_COND_INITIALIZER);
assert(cvthing.lock == PTHREAD_MUTEX_INITIALIZER);
/* get current system time */
ftime(&currSysTime);
abstime.tv_sec = currSysTime.time;
abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm;
abstime.tv_sec += 5;
assert((t[0] = pthread_self()) != NULL);
awoken = 0;
not_canceled = 0;
for (first = 1, last = NUMTHREADS / 2;
first < NUMTHREADS;
first = last + 1, last = NUMTHREADS)
{
assert(pthread_mutex_lock(&start_flag) == 0);
for (i = first; i <= last; i++)
{
threadbag[i].started = 0;
threadbag[i].threadnum = i;
assert(pthread_create(&t[i], NULL, mythread, (void *) &threadbag[i]) == 0);
assert(pthread_detach(t[i]) == 0);
}
/*
* Code to control or munipulate child threads should probably go here.
*/
cvthing.shared = 0;
assert(pthread_mutex_unlock(&start_flag) == 0);
/*
* Give threads time to start.
*/
Sleep(1000);
assert(pthread_mutex_lock(&cvthing.lock) == 0);
cvthing.shared++;
assert(pthread_cond_broadcast(&cvthing.notbusy) == 0);
for (i = first; i <= last; i++)
assert(pthread_cancel(t[i]) == 0);
assert(pthread_mutex_unlock(&cvthing.lock) == 0);
/*
* Give threads time to complete.
*/
Sleep(1000);
}
/*
* Standard check that all threads started.
*/
for (i = 1; i <= NUMTHREADS; i++)
{
failed = !threadbag[i].started;
if (failed)
{
fprintf(stderr, "Thread %d: started %d\n", i, threadbag[i].started);
}
}
/*
* Cleanup the CV.
*/
assert(pthread_mutex_destroy(&cvthing.lock) == 0);
assert(cvthing.lock == NULL);
assert(pthread_cond_destroy(&cvthing.notbusy) == 0);
assert(cvthing.notbusy == NULL);
assert(!failed);
/*
* Check any results here.
*/
assert(awoken == NUMTHREADS);
assert(not_canceled == 0);
/*
* Success.
*/
return 0;
}
|
