Bill Dirks wrote:
>
> Multiple capturing opens can produce subtle repercussions in the
> sematics of various ioctls. For example, suppose an app opens a driver
> and does a GET-FORMAT (or any other kind of query) while there are two
> capturing opens active. The format of which open should be returned? If
> the driver requires both opens to use the same format, which open gets
> control, and will that mess up the app that doesn't have control?
>
> Of course, a driver writer can do whatever he pleases behind the scenes,
> as long the ioctl semantics are preserved such that apps, and therefore
> users, are happy.
I think that multiple opens should be handled by userspace library using
for example shm, becouse it adds unnecessary complexity to driver which
should contain only some hooks, if needed.
--
Marian Jančár <[EMAIL PROTECTED]>
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