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23 #ifndef INCLUDED_BLOCKS_FILE_SOURCE_IMPL_H
24 #define INCLUDED_BLOCKS_FILE_SOURCE_IMPL_H
27 #include <boost/thread/mutex.hpp>
48 bool seek(
long seek_point,
int whence);
49 void open(
const char *filename,
bool repeat);
52 int work(
int noutput_items,