1 files changed, 63 insertions, 0 deletions
diff --git a/ports/winnt/libntp/getclock.c b/ports/winnt/libntp/getclock.c
new file mode 100644
index 0000000..68496bd
--- /dev/null
+++ b/ports/winnt/libntp/getclock.c
@@ -0,0 +1,63 @@
+/*
+ * getclock.c - Emulate Unix getclock(3) nanosecond interface for libntp/ntpd
+ */
+#include "config.h"
+
+#include "ntp_unixtime.h"
+#include "clockstuff.h"
+#include "ntp_stdlib.h"
+
+/*
+ * getclock() is in libntp.  To use interpolation, 
+ * ports/winnt/ntpd/nt_clockstuff.c overrides GetSystemTimeAsFileTime 
+ * via the pointer get_sys_time_as_filetime.
+ */
+PGSTAFT get_sys_time_as_filetime;
+PGSTAFT pGetSystemTimePreciseAsFileTime;
+
+
+int
+getclock(
+	int		clktyp,
+	struct timespec *ts
+	)
+{
+	union {
+		FILETIME ft;
+		ULONGLONG ull;
+	} uNow;
+
+	if (clktyp != TIMEOFDAY) {
+		TRACE(1, ("getclock() supports only TIMEOFDAY clktyp\n"));
+		errno = EINVAL;
+		return -1;
+	}
+
+	(*get_sys_time_as_filetime)(&uNow.ft);
+
+	/* 
+	 * Convert the hecto-nano second time to timespec format
+	 */
+	uNow.ull -= FILETIME_1970;
+	ts->tv_sec = (time_t)( uNow.ull / HECTONANOSECONDS);
+	ts->tv_nsec = (long)(( uNow.ull % HECTONANOSECONDS) * 100);
+
+	return 0;
+}
+
+
+void
+init_win_precise_time(void)
+{
+	HANDLE	hDll;
+	FARPROC	pfn;
+
+	hDll = LoadLibrary("kernel32");
+	pfn = GetProcAddress(hDll, "GetSystemTimePreciseAsFileTime");
+	if (NULL != pfn) {
+		pGetSystemTimePreciseAsFileTime = (PGSTAFT)pfn;
+		get_sys_time_as_filetime = pGetSystemTimePreciseAsFileTime;
+	} else {
+		get_sys_time_as_filetime = &GetSystemTimeAsFileTime;
+	}
+}