A compatibility layer allowing applications written for libusb-0.1 to work
with libusb-1.0. libusb-compat-0.1 attempts to look, feel, smell and walk
like libusb-0.1.
Known quirks/differences from libusb-0.1:
1. usb_resetep(), a previously deprecated function, is implemented as
equivalent to calling usb_clear_halt().
2. libusb-0.1 allowed you to open a device which you did not have
permission to do anything useful with (all I/O requests would
immediately fail). libusb-compat-0.1 does not allow you to open such
devices. You can still read descriptor info without opening a
device.
3. usb_device's "num_children" attribute is hardcoded to 0, and
"children" is hardcoded to NULL. Do you need this information in
your software? Let us know on the mailing list, and we'll add it.
4. Some libusb-0.1 users may have implemented I/O cancellation by
running transfers in their own threads and simply killing the thread
when they don't want to do the transfer any more. This is bad
programming practice for obvious reasons, and this lack of
functionality was one of the primary drivers for libusb-1.0
development. With libusb-1.0 or libusb-compat-0.1 backed by
libusb-1.0, forcefully killing threads in this way is likely to
cause all libusb I/O to halt. Instead, port your application to use
libusb-1.0's asynchronous transfer API, which supports transfer
cancellation.
5. Error codes returned on certain events may not exactly match the
error codes returned by libusb-0.1.
WWW: http://libusb.sourceforge.net/
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