[coyotos-dev] IDL compatibility

[Valerio Bellizzomi]

On 18/06/2007, at 10.54, Jonathan S. Shapiro wrote:

>On Sun, 2007-06-17 at 12:08 +0200, Valerio Bellizzomi wrote:
>> On 16/06/2007, at 18.53, Charles Landau wrote:
>> 
>> >To the extent that Coyotos and CapROS have similar objects, it would 
>> >be very good if programs that use those objects were compatible 
>> >across the two systems. Both systems use IDL, so differences in the 
>> >details of how you invoke a capability are probably not an issue.
>> >
>> >Because Coyotos packages are all under the namespace "coyotos", 
>> >procedures to call an object such as the spacebank will have names 
>> >like "coyotos_spacebank_alloc". In CapROS the corresponding procedure 
>> >names begin with "eros" (or perhaps "capros"). So even if the 
>> >semantics matches, the procedure names of every key invocation would 
>> >have to be changed to move a program from one system to another. Not 
>> >exactly a good compatibility story.
>> >
>> >Is there a better way?
>> 
>> Use a "system" namespace, we would have "system_spacebank_alloc"
>> everywhere.
>
>Yes, calls to the spacebank methods in coyotos will begin with coyotos_.
>This is intentional and necessary. The two systems do not implement
>identical interfaces, and it is therefore not appropriate or desirable
>for them to use the same method namespace. Quite the contrary: if there
>is to be ANY hope at all of cross-compatibility, it is *imperative* that
>these name spaces not overlap.

Indeed, a detail I was not aware of. This shows that I didn't look at the
code yet :-)

>
> PLEASE do NOT switch to something like "system_".
>-- 
>Jonathan S. Shapiro, Ph.D.
>Managing Director
>The EROS Group, LLC
>
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