blob: ef71946ec91f824b29cf07aa48ee546f3363b913 (
plain)
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
|
/*
* File: condvar3.c
*
* Test Synopsis:
* - Test basic function of a CV
*
* Test Method (Validation or Falsification):
* - Validation
*
* Requirements Tested:
* -
*
* Features Tested:
* -
*
* Cases Tested:
* -
*
* Description:
* - The primary thread takes the lock before creating any threads.
* The secondary thread blocks on the lock allowing the primary
* thread to enter the cv wait state which releases the lock.
* The secondary thread then takes the lock and signals the waiting
* primary thread.
*
* Environment:
* -
*
* Input:
* - None.
*
* Output:
* - File name, Line number, and failed expression on failure.
* - No output on success.
*
* Assumptions:
* -
*
* Pass Criteria:
* - pthread_cond_timedwait returns 0.
* - Process returns zero exit status.
*
* Fail Criteria:
* - pthread_cond_timedwait returns ETIMEDOUT.
* - Process returns non-zero exit status.
*/
#include "test.h"
#include <sys/timeb.h>
static pthread_cond_t cv;
static pthread_mutex_t mutex;
static int shared = 0;
enum {
NUMTHREADS = 2 /* Including the primary thread. */
};
void *
mythread(void * arg)
{
int result = 0;
assert(pthread_mutex_lock(&mutex) == 0);
shared++;
assert(pthread_mutex_unlock(&mutex) == 0);
if ((result = pthread_cond_signal(&cv)) != 0)
{
printf("Error = %s\n", error_string[result]);
}
assert(result == 0);
return (void *) 0;
}
int
main()
{
pthread_t t[NUMTHREADS];
struct timespec abstime = { 0, 0 };
struct _timeb currSysTime;
const DWORD NANOSEC_PER_MILLISEC = 1000000;
assert((t[0] = pthread_self()) != NULL);
assert(pthread_cond_init(&cv, NULL) == 0);
assert(pthread_mutex_init(&mutex, NULL) == 0);
assert(pthread_mutex_lock(&mutex) == 0);
/* get current system time */
_ftime(&currSysTime);
abstime.tv_sec = currSysTime.time;
abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm;
assert(pthread_create(&t[1], NULL, mythread, (void *) 1) == 0);
abstime.tv_sec += 5;
while (! (shared > 0))
assert(pthread_cond_timedwait(&cv, &mutex, &abstime) == 0);
assert(shared > 0);
assert(pthread_mutex_unlock(&mutex) == 0);
assert(pthread_cond_destroy(&cv) == 0);
return 0;
}
|
