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Re: mach_port_t vs task_t (really ipc_space_t) in Mach header files
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From: |
Thomas Bushnell, BSG |
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Subject: |
Re: mach_port_t vs task_t (really ipc_space_t) in Mach header files |
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Date: |
28 Sep 2001 01:53:51 -0700 |
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User-agent: |
Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7 |
Roland McGrath <roland@gnu.org> writes:
> There are probably a few weird hacks that rely on true port polymorphism.
> But most of the uses can be described as interface subtyping (e.g. file_t
> and socket_t are subtypes of io_t).
The auth server, for example, hands ports around, and they are fully
generic as far as the auth server sees them, but (generally) io_t as
far as the users are concerned.