Hi Stefano,
On 2012.11.12 12:06, Stefano Di Martino wrote:
> is this supposed to crash, when you don't free a list?
>
> for(i = 0; i < 100; i++) {
> cnt = libusb_get_device_list(NULL, &devs);
> if (cnt < 0)
> return (int) cnt;
> //if (i < 99)
> //libusb_free_device_list(devs, 1);
> }
Probably not.
> It crashes btw only, if I have a Cherry keyboard attached:
1. What is the exact version of libusbx you are using (should be
something like 1.0.14.10586)?
2. On which platform?
3. Have you tested only that platform, or are you seeing the problem on
other platforms?
4. Have you tried other HID keyboards or devices? Did they also produce
a crash, or was it just the Cherry one?
5. Does the app crash on exit or during the loop?
6. If it crashes on exit, you're calling libusb_exit() before closing
your program, right? If you don't, there's of course not much we can do
in terms of performing a clean exit.
Now, I am seeing the following issue with your code on Windows when
running git latest, past the 32 mark:
libusbx: error [set_hid_interface] program assertion failed: max USB
interfaces reached for HID device
So I guess that, at least with regards to HID on Windows, there is
probably something that needs to be fixed (though the likelihood of
someone making 32 concurrent calls to get_device_list is fairly low, so,
while we definitely want to fix it ASAP, I wouldn't see it as high
priority).
I'm also having a massive déjà vu with regards to issuing a bunch of
get_device_list() in succession, to try to produce an error. I think we
fixed something there not so long ago, but I can't figure out when that
occurred. Pretty sure it was for libusbx, yet the thread where that
happened eludes me...
Regards,
/Pete
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