on 21/01/2009 15:35 Kostik Belousov said the following: > On Wed, Jan 21, 2009 at 01:20:51PM +0200, Andriy Gapon wrote: >> Question 1: >> I am writing a driver that would use per-open private data (among other >> features). >> Do I have to use D_TRACKCLOSE flag in this case? > No, the dtr registered with devfs_set_cdevpriv(), is called exactly once > when the last close is performed, or the device is destroyed.
Kostik, thanks a lot for the explanation! I am still a little bit confused about the term "last close" - what is it? I.e. I'd like to get an answer to the below question. >> In general I am a little bit confused about when d_close is invoked. >> Supposing D_TRACKCLOSE is not set and multiple programs concurrently >> open, use and close a device - when d_close is called - when one program >> closes its last descriptor tied to the device or when the system-wide >> last such descriptor is closed? -- Andriy Gapon _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
