I think I see the point.

However could you say somthing more about this:
Qt Code: 
  1. // finished writing to data - move it to some 'safe for reading' area
  2. MyDataStructure* dataPointerThatIsSafeForSharing = MoveToSharedReadingBuffer(data);
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Im not sure about it. Could you give some simple example what should I do in MoveToSharedReadingBuffer(data)?