how to implement delay (microseconds) with real timer ticking at 100ms.
 

hi all,
In my application i implemented one timer(ITIMER_REAL) ticking @ 100ms. Code given below:
struct timeval my_value={0,100000};
struct timeval my_interval={0,100000};
struct itimerval my_timer={my_interval,my_value};
setitimer(ITIMER_REAL, &my_timer, NULL);
signal(SIGALRM,TimerHandler );
TimerHandler is the event executing @ every 100ms.
It works absolutly fine.

The problem is, i already implemented various usleep in application, which gets terminated because of SIGALRM signal from ITIMER_REAL. So now how do i implement delay(micro seconds) without effecting ITIMER_REAL?.

I tried to write own delay by reading microseconds. Code given below:
void delay_1ms(long int ms)
{
struct timeval tv;
ms= ms*1000;
gettimeofday(&tv, NULL);
ms +=tv.tv_usec;
while(ms!=tv.tv_usec)
{
gettimeofday(&tv, NULL);
}
}
but for value 1ms it goes for couple of seconds waiting.
I m doubting is gettimeofday is 'real time read'?
whats the way out friends?

Thanks in advance
-Mayank parasher.

try that.