3cf900afec
Some apps such as VMware for Linux would be happy with it. The code was originally written by Vladimir N. Silyaev. Note: It _includes_ Linux ioctl support, but basically it's FreeBSD native stuff. I'm importing this into emulators category for convevience' sake. Check it out.
56 lines
902 B
C
56 lines
902 B
C
#include <sys/types.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioccom.h>
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#include "rtc.h"
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int main(void)
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{
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int rtc;
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fd_set rset;
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int i,rc;
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int ntests=100;
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struct timeval tv;
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struct timeval begin,end,delta;
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rtc = open("/dev/rtc", O_RDONLY);
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if (rtc<0) {
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perror("/dec/rtc");
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return 1;
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}
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rc = ioctl(rtc, RTCIO_IRQP_SET, 512);
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if (rc<0) {
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perror("/dev/rtc");
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return 1;
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}
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rc = ioctl(rtc, RTCIO_PIE_ON, NULL);
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if (rc<0) {
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perror("/dev/rtc");
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return 1;
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}
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gettimeofday(&begin, NULL);
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for (i=0; i<ntests; i++) {
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FD_ZERO(&rset);
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FD_SET(rtc, &rset);
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tv.tv_sec=0;
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tv.tv_usec=10000;
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rc=select(rtc+1, &rset, NULL, NULL, &tv);
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}
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gettimeofday(&end, NULL);
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timersub(&end, &begin, &delta);
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printf("time %ld msec per test\n", (delta.tv_sec*1000+delta.tv_usec/1000)/ntests);
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return 0;
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}
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