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Old 07-05-2011, 10:29 AM   #1
shankar.489
Member
 
Registered: Jan 2011
Posts: 53

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Unhappy reg:CHANGING SIGNAL HANDLER TABLE FOR THREADS


hi Folks,

iam a newbie to linux iam trying to implement timer specific to threads i have done below code, and blocked here can anybody help me to over come this

void* mythread(void* arg)
{
printf("%s","in mythread...\n");
while(1)
{
sleep(1);
printf("hai\n");
}
return NULL;
}


void timerthread(void *args)
{//this is not being called
printf("timer thread called\n");
}



int main()
{
pthread_t tid;
timer_t timId;
int status;
struct itimerspec ts;
struct sigevent se;
ts.it_value.tv_sec=5;
ts.it_value.tv_nsec=0;
ts.it_interval.tv_sec=0;
ts.it_interval.tv_nsec=0;
//se.sigev_signo=1;

se.sigev_notify= SIGEV_THREAD; // (also tried //SIGEV_THREAD_ID)

pthread_create(&tid,NULL,mythread,NULL);


se.sigev_notify_function=timerthread;(this is not being called dont know why)
se.sigev_notify_attributes=NULL;

//se.sigev_value.sival_ptr="hai";

se.sigev_notify_thread_id=tid;

if( timer_create(CLOCK_REALTIME,NULL,&timId))//also //tried CLOCK_THREAD_CPUTIME_ID
{
perror("timer");
return 0;
}
se.sigev_value.sival_ptr=&timId;
if(timer_settime(timId,NULL,&ts,NULL))
{
perror("settime");
}
perror("setime222");
pthread_join(tid,NULL);
printf("%s","thread finished\n");
return 0;
}

actually my requirement i need my program to call timerthread() api when ever timer expires(with void* as args to it) but here the timerthred is not being called at all after timer expiration SIGALRM is raising to process and my process is getting killed which i dont need.

can you people please let me know where iam wrong, iam in urgent need

please input me in detail is possible, if tried searching it in google but didnt find solution

hope you reply soon

thanks in advance

thankyou,
shankar.

sorry i have typed subject wrongly
 
Old 07-05-2011, 07:31 PM   #2
chrism01
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Registered: Aug 2004
Location: Sydney
Distribution: Centos 6.8, Centos 5.10
Posts: 17,252

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You may want to ask the Mods (via the Report button) to move this to the Programming forum.
 
Old 07-06-2011, 01:28 AM   #3
shankar.489
Member
 
Registered: Jan 2011
Posts: 53

Original Poster
Rep: Reputation: 0
Cool

Quote:
Originally Posted by shankar.489 View Post
hi Folks,

iam a newbie to linux iam trying to implement timer specific to threads i have done below code, and blocked here can anybody help me to over come this

void* mythread(void* arg)
{
printf("%s","in mythread...\n");
while(1)
{
sleep(1);
printf("hai\n");
}
return NULL;
}


void timerthread(void *args)
{//this is not being called
printf("timer thread called\n");
}



int main()
{
pthread_t tid;
timer_t timId;
int status;
struct itimerspec ts;
struct sigevent se;
ts.it_value.tv_sec=5;
ts.it_value.tv_nsec=0;
ts.it_interval.tv_sec=0;
ts.it_interval.tv_nsec=0;
//se.sigev_signo=1;

se.sigev_notify= SIGEV_THREAD; // (also tried //SIGEV_THREAD_ID)

pthread_create(&tid,&se,mythread,NULL);


se.sigev_notify_function=timerthread;(this is not being called dont know why)
se.sigev_notify_attributes=NULL;

//se.sigev_value.sival_ptr="hai";

se.sigev_notify_thread_id=tid;

if( timer_create(CLOCK_REALTIME,NULL,&timId))//also //tried CLOCK_THREAD_CPUTIME_ID
{
perror("timer");
return 0;
}
se.sigev_value.sival_ptr=&timId;
if(timer_settime(timId,NULL,&ts,NULL))
{
perror("settime");
}
perror("setime222");
pthread_join(tid,NULL);
printf("%s","thread finished\n");
return 0;
}

actually my requirement i need my program to call timerthread() api when ever timer expires(with void* as args to it) but here the timerthred is not being called at all after timer expiration SIGALRM is raising to process and my process is getting killed which i dont need.

can you people please let me know where iam wrong, iam in urgent need

please input me in detail is possible, if tried searching it in google but didnt find solution

hope you reply soon

thanks in advance

thankyou,
shankar.

sorry i have typed subject wrongly
my problem has been solved now and now above program will work fine pleople can use it for exploration purpose..?
 
  


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