|
1
|
#include <errno.h>
|
|
2
|
#include <signal.h>
|
|
3
|
#include <stdio.h>
|
|
4
|
#include <string.h>
|
|
5
|
#include <sys/select.h>
|
|
6
|
#include <unistd.h>
|
|
7
|
#include <pthread.h>
|
|
8
|
|
|
9
|
#define SIG SIGALRM
|
|
10
|
|
|
11
|
void signal_action(int signal)
|
|
12
|
{
|
|
13
|
|
|
14
|
}
|
|
15
|
|
|
16
|
static pthread_mutex_t foo_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
17
|
|
|
18
|
void* thread_routine(void* arg)
|
|
19
|
{
|
|
20
|
volatile double d;
|
|
21
|
long i, j;
|
|
22
|
long t = (long)arg;
|
|
23
|
|
|
24
|
struct sigaction sa;
|
|
25
|
sa.sa_handler = signal_action;
|
|
26
|
|
|
27
|
|
|
28
|
if(sigaction(SIG, &sa, NULL) < 0)
|
|
29
|
{
|
|
30
|
fprintf(stderr, "sigaction failed with %d (%s)\n", errno, strerror(errno));
|
|
31
|
return NULL;
|
|
32
|
}
|
|
33
|
|
|
34
|
for (i=0; i<299999000; i++)
|
|
35
|
{
|
|
36
|
d = i/3 * 0.14f + t;
|
|
37
|
}
|
|
38
|
|
|
39
|
int rc = select(0, NULL, NULL, NULL, NULL);
|
|
40
|
if(rc < 0)
|
|
41
|
{
|
|
42
|
fprintf(stderr, "Select error: %d (%s)\n", errno, strerror(errno));
|
|
43
|
}
|
|
44
|
else
|
|
45
|
{
|
|
46
|
fprintf(stderr, "Select return %d\n", rc);
|
|
47
|
}
|
|
48
|
fprintf(stderr, "got result: %lf\n", d);
|
|
49
|
}
|
|
50
|
|
|
51
|
int main(int argc, char** argv)
|
|
52
|
{
|
|
53
|
pthread_t handle;
|
|
54
|
|
|
55
|
struct timeval tv;
|
|
56
|
|
|
57
|
gettimeofday(&tv, NULL);
|
|
58
|
|
|
59
|
int rc = pthread_create(&handle, NULL, thread_routine, (void *)tv.tv_sec);
|
|
60
|
if(rc != 0)
|
|
61
|
{
|
|
62
|
fprintf(stderr, "pthread_create failed with %d (%s)\n", rc, strerror(rc));
|
|
63
|
return 1;
|
|
64
|
}
|
|
65
|
|
|
66
|
sleep(1);
|
|
67
|
fprintf(stderr, "done sleep\n");
|
|
68
|
|
|
69
|
rc = pthread_kill(handle, SIG);
|
|
70
|
if(rc != 0)
|
|
71
|
{
|
|
72
|
fprintf(stderr, "pthread_kill failed with %d (%s)\n", rc, strerror(rc));
|
|
73
|
return 1;
|
|
74
|
}
|
|
75
|
|
|
76
|
rc = pthread_join(handle, NULL);
|
|
77
|
if(rc != 0)
|
|
78
|
{
|
|
79
|
fprintf(stderr, "pthread_join failed with %d (%s)\n", rc, strerror(rc));
|
|
80
|
return 1;
|
|
81
|
}
|
|
82
|
|
|
83
|
return 0;
|
|
84
|
}
|
|
85
|
|