diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/7zip/Common/LockedStream.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/7zip/Common/LockedStream.h	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,38 @@
+// LockedStream.h
+
+#ifndef __LOCKEDSTREAM_H
+#define __LOCKEDSTREAM_H
+
+#include "../../Windows/Synchronization.h"
+#include "../../Common/MyCom.h"
+#include "../IStream.h"
+
+class CLockedInStream
+{
+  CMyComPtr<IInStream> _stream;
+  NWindows::NSynchronization::CCriticalSection _criticalSection;
+public:
+  void Init(IInStream *stream)
+    { _stream = stream; }
+  HRESULT Read(UInt64 startPos, void *data, UInt32 size, UInt32 *processedSize);
+};
+
+class CLockedSequentialInStreamImp: 
+  public ISequentialInStream,
+  public CMyUnknownImp
+{
+  CLockedInStream *_lockedInStream;
+  UInt64 _pos;
+public:
+  void Init(CLockedInStream *lockedInStream, UInt64 startPos)
+  {
+    _lockedInStream = lockedInStream;
+    _pos = startPos;
+  }
+
+  MY_UNKNOWN_IMP
+
+  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
+};
+
+#endif