Re: [libusb] libusb_bulk_transfer() multiple threads

[Tim R. <ti...@pr...>]

On 9/12/22 06:58, François Colas wrote:

>
> I would like to know if it's valid or not to use 
> `libusb_bulk_transfer()` on two different endpoints at the same time 
> (two threads) but with same `libusb_device_handle` object.
>
> I need this to do only one claim for both transfers otherwise I have 
> to do only one transfer at a time (the device supports two transfers 
> at a time).


This is very common.  It's usually done with asynchronous I/O, but is 
should be fine with the synchronous APIs as well.


Your device shouldn't care at all.  It is a "serial" bus, after all.  
The requests might be interleaved at the packet level, but that's part 
and parcel of what a USB device has to handle.

-- 

Tim Roberts,ti...@pr...
Providenza & Boekelheide, Inc.