1 files changed, 23 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/7zip/Common/LockedStream.cpp b/other-licenses/7zstub/src/7zip/Common/LockedStream.cpp
new file mode 100644
index 0000000000..637c8980cd
--- /dev/null
+++ b/other-licenses/7zstub/src/7zip/Common/LockedStream.cpp
@@ -0,0 +1,23 @@
+// LockedStream.cpp
+
+#include "StdAfx.h"
+
+#include "LockedStream.h"
+
+HRESULT CLockedInStream::Read(UInt64 startPos, void *data, UInt32 size, 
+  UInt32 *processedSize)
+{
+  NWindows::NSynchronization::CCriticalSectionLock lock(_criticalSection);
+  RINOK(_stream->Seek(startPos, STREAM_SEEK_SET, NULL));
+  return _stream->Read(data, size, processedSize);
+}
+
+STDMETHODIMP CLockedSequentialInStreamImp::Read(void *data, UInt32 size, UInt32 *processedSize)
+{
+  UInt32 realProcessedSize = 0;
+  HRESULT result = _lockedInStream->Read(_pos, data, size, &realProcessedSize);
+  _pos += realProcessedSize;
+  if (processedSize != NULL)
+    *processedSize = realProcessedSize;
+  return result;
+}