Re: [Xen-devel] back/frontend drivers HelloWorld

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 23 Sep 2005, at 12:37, NAHieu wrote:

> Yes, it is. But looks like xenstore is the only way to "notify"
> between userspace applications (like one runs in domU and another runs
> in dom0). Or there is another good solution ?
You can execute all the event-channel binding and sending commands via 
libxenctrl (see the interfaces defintiions in xenctrl.h).
You can receive asynchronous notifications via /dev/xen/evtchn. You 
execute a special ioctl to bind to particular event-channel ports, then 
you can read() from the device to read ports that have notifications 
pending, or you can add the fd to a select loop(), or you can set 
FASYNC and get SIGIO when there are notifications pending.
 -- Keir


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