2015-04-28 11:16:13 Wander Lairson Costa <wander.lairson@gm...>: >> Should that name just be added to the big list o' names already >> in libusb0.py _load_library()? Or check for sys.platform == 'sunos5' >> and define a different _load_library that knows the right path? Or >> some other approach?
> Sorry, you commented this in the patch and I completely forgot > to answer it. I think the simplest solution would be to add it > to the list of candidates. Looking more closely, it wouldn't need added to the candidate list, because it's called libusb.so and "usb" is already a candidate. It would be found if it were in a more usual directory, but not in /usr/sfw/lib. I was working on Solaris 10; possibly Solaris 11 has moved it to solve that problem, as https://www.mail-archive.com/opensolaris-arc@mail.opensolaris.org/msg13077.html suggests. > He doesn't necessarily need to rewrite the app in C, but he > can write a faster backend. I am not worried about optimization > right now, but guessing common paths seems like a smart and simple > optimization. I looked more at where the external processes he complained of get run, and sure enough, it's in ctypes.util.find_library. It /unconditionally/ tries to run expensive stuff like gcc or objdump to "find" your argument, even if you pass a full path. (oh yes, another thing that wasn't working: the /usr/sfw/bin/gcc on solaris actually does know to look in /usr/sfw/lib, but it uses the Solaris ld. The ctypes.util.find_library code assumes GNU ld with a -t option to write all the found file names as it sees them, but -t to solaris ld means something else altogether.) I don't really feel like also writing patches for ctypes, but I think it probably would be a good optimization here to just try a few common full paths before falling back to the ctypes.util.find_library. It might just plain work better, in addition to solving the whole startup delay issue that made that blogger think he had to port everything to C. :) I'll think about how a patch would look.... -Chap ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
