From a87b4e23d688fd5e5ff7e332a522599b86881f68 Mon Sep 17 00:00:00 2001
From: "Asanka C. Herath" <asanka@secure-endpoints.com>
Date: Thu, 7 Oct 2010 11:31:11 -0400
Subject: [PATCH] Windows: Implement gettimeofday() using native APIs

We now use GetSystemTimeAsFileTime() for gettimeofday().  This gives
us a better resolution than one second.
---
 lib/roken/gettimeofday.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/lib/roken/gettimeofday.c b/lib/roken/gettimeofday.c
index e6e2e04a3..a53b96f4f 100644
--- a/lib/roken/gettimeofday.c
+++ b/lib/roken/gettimeofday.c
@@ -35,6 +35,31 @@
 #include "roken.h"
 #ifndef HAVE_GETTIMEOFDAY
 
+#ifdef _WIN32
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+gettimeofday (struct timeval *tp, void *ignore)
+{
+    FILETIME ft;
+    ULARGE_INTEGER li;
+    ULONGLONG ull;
+
+    GetSystemTimeAsFileTime(&ft);
+    li.LowPart = ft.dwLowDateTime;
+    li.HighPart = ft.dwHighDateTime;
+    ull = li.QuadPart;
+
+    ull -= 116444736000000000i64;
+    ull /= 10i64;               /* ull is now in microseconds */
+
+    tp->tv_usec = (ull % 1000000i64);
+    tp->tv_sec  = (ull / 1000000i64);
+
+    return 0;
+}
+
+#else
+
 /*
  * Simple gettimeofday that only returns seconds.
  */
@@ -48,4 +73,6 @@ gettimeofday (struct timeval *tp, void *ignore)
      tp->tv_usec = 0;
      return 0;
 }
+
+#endif  /* !_WIN32 */
 #endif