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

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

     virtual int request(const Request &request);
     virtual void cancel(int token);
 
     virtual bool isReady(int token);
     virtual bool isCancelled(int token); // and safe to delete
+    virtual bool haveRequest(int token);
     virtual bool getRequest(int token, Request &request);
     virtual void done(int token);
     
 protected:
     int m_nextToken;