From f0282e0b50e296f54fdad6a7b7b0eae14b62522b Mon Sep 17 00:00:00 2001
From: Tobias Kaupat <code@niondir.de>
Date: Thu, 30 Nov 2017 12:08:22 +0100
Subject: [PATCH] Use mutex on Close() to avoid data races on windows

---
 serial_windows.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/serial_windows.go b/serial_windows.go
index 01fc9a6..e2c40f5 100644
--- a/serial_windows.go
+++ b/serial_windows.go
@@ -17,9 +17,13 @@ package serial
 
 */
 
-import ("syscall")
+import (
+	"syscall"
+	"sync"
+)
 
 type windowsPort struct {
+	mu sync.Mutex
 	handle syscall.Handle
 }
 
@@ -58,8 +62,10 @@ func nativeGetPortsList() ([]string, error) {
 }
 
 func (port *windowsPort) Close() error {
+	port.mu.Lock()
 	defer func() {
 		port.handle = 0
+		port.mu.Unlock()
 	}()
 	if port.handle == 0 {
 		return nil