Hi, On Fri, Sep 09, 2011 at 12:08:39PM +0200, Thomas Schmitt wrote:
> > routine device_set_status( > > device : device_t; > > in flavor : dev_flavor_t; > > in status : dev_status_t > > ); > Why no "in" or "out" before parameter "device" ? Well, I would have said that the first parameter is just special. (It's the port on which the RPC was invoked; basically it's only there to give it a name.) However, I just saw that device_open() also has other parameters without a direction... So I have to admit quite frankly that I don't know what this really means. On the plus side, it's probably not necessary to know this :-) > How to say "in and out" ? There is also an "inout" direction. > Can you give me an URL where the language is documented ? I for my part never read any formal documentation for this -- just looked at other examples in the Mach and Hurd .defs :-) > How to name the function ? device_transact_scsi() ? Hurray, bikeshedding time! ;-) > > What is a bit more involved will be to add the method to the > > device_emulation_ops structure, and the ds_device_foo routine in > > device/ds_routines.c just like the ds_device_set_status() one. > > I found the struct definition in gnumach/device/device_emul.h . There > i read > /* Each emulation layer provides these operations. */ > > Does that mean, that all instances of struct device_emulation_ops have > to be augmented by a function pointer ? Yes, I think so. -antrik-
