| naveenisback |
08-22-2009 04:07 AM |
creating a timer
Hi to all,
I am very sad today because of timer program problem.. I will explain my requirement in code.
OS:linux
language : C
i have to create a timer and also have to keep track of time. that means after 2 min I have to display as monitor is off after 3 min i hav to display as system shutdown.. i cant use sleep, wait calls.. because I am running multithread program(~1000 threads).
I used setitimer().. but it is working for 1 timer..
The following code mat help u to know what i need.
Code:
struct Poweroff Power;
void shutdown_signal(int i)
{
signal(SIGALRM, shutdown_signal);
printf("system is shutting down \n");
}
void udpserver(int);
void logoff_signal(int i)
{
signal(SIGALRM, logoff_signal);
struct itimerval shutdown;
printf("system is logging off \n");
//udpserver(1000);
shutdown.it_value.tv_sec = Power.Shutdowntime;
setitimer(ITIMER_REAL, &shutdown, 0);
signal(SIGALRM, shutdown_signal);
}
void dim_signal(int i)
{
signal(SIGALRM, dim_signal);
printf("system is dim \n");
}
void timers()
{
if(Power.Logofftime < Power.Dimtime)
{
struct itimerval logoff;
printf("dim is high\n");
logoff.it_interval.tv_sec=0;
logoff.it_interval.tv_usec = 0;
logoff.it_value.tv_sec = Power.Logofftime*60;
setitimer(ITIMER_REAL, &logoff, 0);
signal(SIGALRM, logoff_signal);
}
else
{
struct itimerval dim;
printf("dim is low\n");
dim.it_interval.tv_sec=0;
dim.it_interval.tv_usec = 0;
dim.it_value.tv_sec = Power.Dimtime*60;
setitimer(ITIMER_REAL, &dim, 0);
signal(SIGALRM, dim_signal);
}
}
void idle_starts(int i)
{
printf("idle time over(system is idle)!!!!!!!!after sec!!!!!!!!\n");
timers();
void fortimer(int portid)
{
printf("portid is %d", portid);
parse_first("currentpowersettings.xml", portid, &Power);
printf("Dim time is %d\n", Power.Dimtime);
struct itimerval idle;
int randomtime = random_generator();
printf("random time is %d\n", randomtime);
idle.it_interval.tv_sec=0;
idle.it_interval.tv_usec = 0;
idle.it_value.tv_sec = randomtime;
idle.it_value.tv_usec = 0;
setitimer(ITIMER_REAL, &idle,0); //start timer for idle time
signal(SIGALRM,idle_starts);
}
// to generate idle_time
int random_generator()
{
return (rand() % MAX_RAND) + 1;
}
//thread init function
void *thread_func(void *arg)
{
int portid = (int)arg;
char* threadstarttime = timestamp(); //get thread start time
fortimer(portid);
createsocket(portid, threadstarttime);
}
int main(int argc , char* argv[])
{
pthread_t tid[atoi(argv[1])];
int i , j;
int portnu = atoi(argv[2]);
if(argc != 3)
{
printf("Give number of agents and starting port number as command line arguments\n");
exit(1);
}
//creating threads
for(i = 0; i < atoi(argv[1]); i++)
{
pthread_create(&tid[i], NULL, &thread_func, (void *)portnu+i);
}
for(j = 0; j < atoi(argv[1]); j++)
{
pthread_join(tid[j], NULL);
}
return 0;
}
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