How do I get the file descriptors for use with event loops

[detly]

I am trying to integrate rusb with the Calloop event loop. Usually this involves getting file descriptors for polling and adding them to the loop. Anything that implements AsRawFd works.

In my case I'm mainly interested in hotplug events, so I want the "whole-context" file descriptors that are available from the get_pollfds() call. Is there any (safe, preferably) way to get these?

[detly]

I achieved this through using rusb as a submodule and getting at libusb1_sys within my own project. Do you have a particular opinion about whether libusb1_sys and its types (eg. libusb_pollfds) should be exposed or not?

[a1ien]

You can add both rusb and libusb1_sys as dependency to you project and directly use any function from libusb1_sys

[dependencies]
rusb = "0.8.1"
libusb1-sys = "0.5.0"

    unsafe {
        libusb1_sys::libusb_get_pollfds(std::ptr::null_mut());
    }

You don't need to add rusb as submodule to achieve this.

[detly]

Won't this pull libusb1_sys from crates.io, which is based on the deprecated standalone repository?

[a1ien]

Yes. but it's must not be a problem.
P.S. As I say in #56 i add re-export for libusb1-sys. I think do this in couple of week and releasing major version with #72 and #71

[detly]

Great, thanks!