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#include "project.h"
#define SLEEP_MIN 100000
#define THRESH 1000
void sync_to_second (struct timeval *ret)
{
struct timeval tv1, tv2;
ret->tv_usec = 0;
for (;;) {
tv2.tv_sec = 0;
gettimeofday (&tv1, NULL);
tv2.tv_usec = 1000000 - tv1.tv_usec;
if (tv1.tv_usec < THRESH) {
ret->tv_sec = tv1.tv_sec;
return;
} else if (tv2.tv_usec < THRESH) {
ret->tv_sec = tv1.tv_sec + 1;
return;
}
#ifdef __WINNT__
usleep (tv2.tv_usec / 2);
#else
if (tv2.tv_usec > SLEEP_MIN)
select (0, NULL, NULL, NULL, &tv2);
else
usleep (tv2.tv_usec / 2);
#endif
}
}
void sync_to_minute (struct timeval *ret)
{
struct timeval tv1, tv2;
ret->tv_usec = 0;
for (;;) {
tv2.tv_sec = 0;
gettimeofday (&tv1, NULL);
tv2.tv_sec = 60 - (tv1.tv_sec % 60);
tv2.tv_usec = 1000;
printf ("%d seconds left in min\n", (int) tv2.tv_sec);
if (tv2.tv_sec > 1) {
tv2.tv_sec /= 2;
#ifdef __WINNT__
sleep (tv2.tv_sec);
#else
select (0, NULL, NULL, NULL, &tv2);
#endif
} else {
sync_to_second (ret);
return;
}
}
}
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