1 files changed, 18 insertions, 0 deletions
diff --git a/pjsip-apps/src/pjsua/winrt/gui/uwp/VoipBackEnd/ApiLock.cpp b/pjsip-apps/src/pjsua/winrt/gui/uwp/VoipBackEnd/ApiLock.cpp
new file mode 100644
index 00000000..c081223a
--- /dev/null
+++ b/pjsip-apps/src/pjsua/winrt/gui/uwp/VoipBackEnd/ApiLock.cpp
@@ -0,0 +1,18 @@
+/* 
+    Copyright (c) 2012 Microsoft Corporation.  All rights reserved.
+    Use of this sample source code is subject to the terms of the Microsoft license 
+    agreement under which you licensed this sample source code and is provided AS-IS.
+    If you did not accept the terms of the license agreement, you are not authorized 
+    to use this sample source code.  For the terms of the license, please see the 
+    license agreement between you and Microsoft.
+  
+*/
+#include "pch.h"
+#include "ApiLock.h"
+
+namespace VoipBackEnd
+{
+    // A mutex used to protect objects accessible from the API surface exposed by this DLL
+    std::recursive_mutex g_apiLock;
+}
+