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#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <stdint.h>
int
wait_a_while (useconds_t interval)
{
int num_times = 0;
int return_value = 1;
struct timeval start_time;
gettimeofday(&start_time, NULL);
uint64_t target = start_time.tv_sec * 1000000 + start_time.tv_usec + interval;
while (1)
{
num_times++;
return_value = usleep (interval);
if (return_value != 0)
{
struct timeval now;
gettimeofday(&now, NULL);
interval = target - (now.tv_sec * 1000000 + now.tv_usec);
}
else
break;
}
return num_times;
}
int
main (int argc, char **argv)
{
printf ("stop here in main.\n");
int num_times = wait_a_while (argc * 1000);
printf ("Done, took %d times.\n", num_times);
return 0;
}
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