From 8a72954d7a900736ce85f05cfa8c0df1c013acaa Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Mon, 13 Aug 2018 21:15:42 +0200
Subject: Window Mutex: make sure we properly initialize the SRWLock

---
 src/libstd/sys/windows/mutex.rs | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/libstd/sys')

diff --git a/src/libstd/sys/windows/mutex.rs b/src/libstd/sys/windows/mutex.rs
index 9bf9f749d4d..58f24eb1323 100644
--- a/src/libstd/sys/windows/mutex.rs
+++ b/src/libstd/sys/windows/mutex.rs
@@ -58,6 +58,8 @@ pub unsafe fn raw(m: &Mutex) -> c::PSRWLOCK {
 impl Mutex {
     pub const fn new() -> Mutex {
         Mutex {
+            // This works because SRWLOCK_INIT is a NULL pointer, so we are also properly
+            // initializing an SRWLOCK here.
             lock: AtomicUsize::new(0),
             held: UnsafeCell::new(false),
         }
-- 
cgit 1.4.1-3-g733a5