-/* return a broken out time, with microseconds
- * Must be mutex-protected.
- */
-#ifdef _WIN32
-/* Windows SYSTEMTIME only has 10 millisecond resolution, so we
- * also need to use a high resolution timer to get microseconds.
- * This is pretty clunky.
- */
-void
-lutil_gettime( struct lutil_tm *tm )
-{
- static LARGE_INTEGER cFreq;
- static LARGE_INTEGER prevCount;
- static int subs;
- static int offset;
- LARGE_INTEGER count;
- SYSTEMTIME st;
-
- GetSystemTime( &st );
- QueryPerformanceCounter( &count );
-
- /* We assume Windows has at least a vague idea of
- * when a second begins. So we align our microsecond count
- * with the Windows millisecond count using this offset.
- * We retain the submillisecond portion of our own count.
- */
- if ( !cFreq.QuadPart ) {
- long long t;
- int usec;
- QueryPerformanceFrequency( &cFreq );
-
- t = count.QuadPart * 1000000;
- t /= cFreq.QuadPart;
- usec = t % 10000000;
- usec /= 1000;
- offset = ( usec - st.wMilliseconds ) * 1000;
- }
-
- /* It shouldn't ever go backwards, but multiple CPUs might
- * be able to hit in the same tick.
- */
- if ( count.QuadPart <= prevCount.QuadPart ) {
- subs++;
- } else {
- subs = 0;
- prevCount = count;
- }
-
- tm->tm_usub = subs;
-
- /* convert to microseconds */
- count.QuadPart *= 1000000;
- count.QuadPart /= cFreq.QuadPart;
- count.QuadPart -= offset;
-
- tm->tm_usec = count.QuadPart % 1000000;
-
- /* any difference larger than microseconds is
- * already reflected in st
- */
-
- tm->tm_sec = st.wSecond;
- tm->tm_min = st.wMinute;
- tm->tm_hour = st.wHour;
- tm->tm_mday = st.wDay;
- tm->tm_mon = st.wMonth - 1;
- tm->tm_year = st.wYear - 1900;
-}
-#else
-void
-lutil_gettime( struct lutil_tm *ltm )
-{
- struct timeval tv;
- static struct timeval prevTv;
- static int subs;
-
-#ifdef HAVE_GMTIME_R
- struct tm tm_buf;
-#endif
- struct tm *tm;
- time_t t;
-
- gettimeofday( &tv, NULL );
- t = tv.tv_sec;
-
- if ( tv.tv_sec < prevTv.tv_sec
- || ( tv.tv_sec == prevTv.tv_sec && tv.tv_usec == prevTv.tv_usec )) {
- subs++;
- } else {
- subs = 0;
- prevTv = tv;
- }
-
- ltm->tm_usub = subs;
-
-#ifdef HAVE_GMTIME_R
- tm = gmtime_r( &t, &tm_buf );
-#else
- tm = gmtime( &t );
-#endif
-
- ltm->tm_sec = tm->tm_sec;
- ltm->tm_min = tm->tm_min;
- ltm->tm_hour = tm->tm_hour;
- ltm->tm_mday = tm->tm_mday;
- ltm->tm_mon = tm->tm_mon;
- ltm->tm_year = tm->tm_year;
- ltm->tm_usec = tv.tv_usec;
-}
-#endif
-