Hi, On Tue, Jul 07, 2009 at 01:21:09PM +0800, Da Zheng wrote: > olafbuddenha...@gmx.net wrote:
>> Well, AIUI, there are only two ways how a receive right could be used: >> either mach_port_insert_right() (or mach_port_extract_right()) is >> invoked, in which case we can look at the parameters, so we know exactly >> where it is. >> >> The other option is that it's sent to another task via an RPC. In this >> case indeed we don't know what name it ends up as, so I guess we >> actually have to search for it -- but at least we know in which task. >> >> Unless I'm missing something essential, there is never any need to >> search through all the tasks... >> > We can look at the parameters of mach_port_extract_right() to find the > port name of the receive right, but it doesn't always work for > mach_port_insert_right(). > The parameter name of mach_port_insert_right() is the port name where we > are going to insert the port right and isn't necessary to be the port > name of the receive right (though in many cases they are). > But you are right, we can always know which task has the receive right. > I decide not to treat mach_port_insert_right() or > mach_port_extract_right() specially, but search for the receive right in > a specific task. I didn't really understand the bit about mach_port_insert_right()... But as we probably can't avoid the search in the RPC case anyways, I'm fine with doing it like this :-) -antrik-
