From 0605abe3bb7b602cbe70a72797fdd6ca90d76e92 Mon Sep 17 00:00:00 2001
From: Dan Aloni <dan@kernelim.com>
Date: Mon, 9 Mar 2020 17:40:31 +0200
Subject: [PATCH] Use GetSystemTimePreciseAsFileTime if it is available

---
 src/libstd/sys/windows/c.rs    | 4 ++++
 src/libstd/sys/windows/time.rs | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libstd/sys/windows/c.rs b/src/libstd/sys/windows/c.rs
index 4d377341be30f..ed0b239b9f90e 100644
--- a/src/libstd/sys/windows/c.rs
+++ b/src/libstd/sys/windows/c.rs
@@ -1044,6 +1044,10 @@ compat_fn! {
                     _dwBufferSize: DWORD) -> BOOL {
         SetLastError(ERROR_CALL_NOT_IMPLEMENTED as DWORD); 0
     }
+    pub fn GetSystemTimePreciseAsFileTime(lpSystemTimeAsFileTime: LPFILETIME)
+                                          -> () {
+        GetSystemTimeAsFileTime(lpSystemTimeAsFileTime)
+    }
     pub fn SleepConditionVariableSRW(ConditionVariable: PCONDITION_VARIABLE,
                                      SRWLock: PSRWLOCK,
                                      dwMilliseconds: DWORD,
diff --git a/src/libstd/sys/windows/time.rs b/src/libstd/sys/windows/time.rs
index 86667ca7ab2dd..900260169c767 100644
--- a/src/libstd/sys/windows/time.rs
+++ b/src/libstd/sys/windows/time.rs
@@ -74,7 +74,7 @@ impl SystemTime {
     pub fn now() -> SystemTime {
         unsafe {
             let mut t: SystemTime = mem::zeroed();
-            c::GetSystemTimeAsFileTime(&mut t.t);
+            c::GetSystemTimePreciseAsFileTime(&mut t.t);
             t
         }
     }