Can I allow multiple programs to read from the same file at the same time?

Question

I have an application that reads a set of data files and performs some model computations. The program does not need to modify the data files themselves, so I\'m currently

Answer 1

If you can change the fopen routine then try to replace fopen calls with _fsopen, for shared reading/writing. _fsopen is mscrt-specific.

If you can use CreateFile, and don't want to re-write all the legacy code for read/write, you can also try associating a FILE * with a winapi file handle. Use _open_osfhandle to get a file descriptor from a file handle returned by CreateFile, then use _fdopen to get a FILE * from that file descriptor.