comparison data/fileio/MatrixFile.h @ 455:3e0f1f7bec85

* Fix a nasty and long-standing race condition in MatrixFile's use of
  FileReadThread that was causing crashes sometimes

     
     void resize(size_t width, size_t height);
     void reset();
 
     bool haveSetColumnAt(size_t x) const { return m_columnBitset->get(x); }
-    void getColumnAt(size_t x, void *data);
+    void getColumnAt(size_t x, void *data); // may throw FileReadFailed
     void setColumnAt(size_t x, const void *data);
 
     void suspend();
 
 protected: