Joaquim Duran wrote: > > I'm new to this e-mail list. In the current project, I would like use > a 3rd party library to monitor the IO events on file descriptors, > including libusb library (I would like to use the reactor patter). > > To do the integration, I've the following questions: > > 1 - It is possible to get de file descriptor of a device handle > without calling to libusb_get_pollfds? I would like to get the FD for > a device handle and avoid to allocate dynamic memory.
No. The whole FD list is an internal implementation detail. As the documentation tells you, there is not necessarily a single FD per device. You might get a set of FDs, and you need to poll for them all. > 2 - After calling polling/select system calls, it is possible to call > synchronous transfer functions to read or send data to the USB device? Not exactly. Remember that USB traffic never happens unless there is a pending request. A USB device cannot send data on its own, and it cannot signal that it is ready to receive. Everything starts with the host application/driver. What the poll lets you do is learn when a previously-submitted asynchronous request has completed. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
