diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/7zip/Common/VirtThread.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/7zip/Common/VirtThread.h	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,23 @@
+// VirtThread.h
+
+#ifndef __VIRTTHREAD_H
+#define __VIRTTHREAD_H
+
+#include "../../Windows/Synchronization.h"
+#include "../../Windows/Thread.h"
+
+struct CVirtThread
+{
+  NWindows::NSynchronization::CAutoResetEvent StartEvent;
+  NWindows::NSynchronization::CAutoResetEvent FinishedEvent;
+  NWindows::CThread Thread;
+  bool ExitEvent;
+
+  ~CVirtThread();
+  HRes Create();
+  void Start();
+  void WaitFinish() { FinishedEvent.Lock(); } 
+  virtual void Execute() = 0;
+};
+
+#endif