Get microsecond time resolution on Windows.

diff --git a/src/dropin.c b/src/dropin.c
index f1a51ac..ab3fd6b 100644 (file)
--- a/src/dropin.c
+++ b/src/dropin.c
@@ -158,8 +158,18 @@ int vasprintf(char **buf, const char *fmt, va_list ap) {
 
 #ifndef HAVE_GETTIMEOFDAY
 int gettimeofday(struct timeval *tv, void *tz) {
+#ifdef HAVE_MINGW
+       FILETIME ft;
+       GetSystemTimeAsFileTime(&ft);
+       uint64_t lt = (uint64_t)ft.dwLowDateTime | ((uint64_t)ft.dwHighDateTime << 32);
+       lt -= 116444736000000000ULL;
+       tv->tv_sec = lt / 10000000;
+       tv->tv_usec = (lt / 10) % 1000000;
+#else
+#warning No high resolution time source!
        tv->tv_sec = time(NULL);
        tv->tv_usec = 0;
+#endif
        return 0;
 }
 #endif