On Fri, Mar 13, 2009 at 07:09:26AM -0700, Eric Blossom wrote: > On Fri, Mar 13, 2009 at 01:49:31PM +0100, Martin Braun wrote: > > Hi, > > > > following > > http://lists.gnu.org/archive/html/discuss-gnuradio/2009-02/msg00400.html, > > I tried connecting two processes with a FIFO using gr.file_descriptor_*. > > > > However, I can't seem to pass the file descriptor from the Python to the > > C++ domain. This is the error message I get: > > > > gr_file_descriptor_sink: Bad file descriptor > > > > This is the code (pipe1 was created by using 'mkfifo pipe1'): > > The python file object, fid, is going out of scope, and thus the > underlying file is being closed. Try self.fid = open(...)
Thanks, Eric, that helped. If anyone ever tries doing this: Both Python and gr_file_descriptor_sink will try to close the file, resulting in a warning. If you ask me, gr_file_descriptor_* should not close the file in the destructors - if anyone's using these blocks, they should usually know what they're doing. Plus, to use a gr_file_descriptor, you need to open the file yourself beforehand, the closing should thus happen in the same scope. I suggest kicking the close() lines from gr_file_descriptor*::~gr_file_descriptor*. Just my two Euro-cents... MB -- Dipl.-Ing. Martin Braun Phone: +49-(0)721-608 3790 Institut fuer Nachrichtentechnik Fax: +49-(0)721-608 6071 Universitaet Karlsruhe (TH) http://www.int.uni-karlsruhe.de/
pgp406vD22RYh.pgp
Description: PGP signature
_______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
