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#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioccom.h>
#include "rtc.h"
int main(void)
{
int rtc;
fd_set rset;
int i,rc;
int ntests=100;
struct timeval tv;
struct timeval begin,end,delta;
rtc = open("/dev/rtc", O_RDONLY);
if (rtc<0) {
perror("/dec/rtc");
return 1;
}
rc = ioctl(rtc, RTCIO_IRQP_SET, 512);
if (rc<0) {
perror("/dev/rtc");
return 1;
}
rc = ioctl(rtc, RTCIO_PIE_ON, NULL);
if (rc<0) {
perror("/dev/rtc");
return 1;
}
gettimeofday(&begin, NULL);
for (i=0; i<ntests; i++) {
FD_ZERO(&rset);
FD_SET(rtc, &rset);
tv.tv_sec=0;
tv.tv_usec=10000;
rc=select(rtc+1, &rset, NULL, NULL, &tv);
}
gettimeofday(&end, NULL);
timersub(&end, &begin, &delta);
printf("time %ld msec per test\n", (delta.tv_sec*1000+delta.tv_usec/1000)/ntests);
return 0;
}
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