Current genode release

[Chen Tian]

Hi Norman,

A statement "Genode::Cpu_session_capability
h_cap(Genode::env()->parent()->session("CPU","ram_quota=4K"));" that can be
compiled before triggers the following error message now:


/home/tianc/git/omnios/genode/base/include/base/capability.h: In member
function ‘Genode::Untyped_capability Genode::Capability<RPC_INTERFACE,
BCT>::_check_compatibility(const Genode::Capability<FROM_RPC_INTERFACE,
FROM_BCT>&) [with FROM_RPC_INTERFACE = Genode::Session, FROM_BCT =
Genode::Native_capability, RPC_INTERFACE = Genode::Cpu_session, BCT =
Genode::Native_capability]’:
/home/tianc/git/omnios/genode/base/include/base/capability.h:147:
instantiated from ‘Genode::Capability<RPC_INTERFACE, BCT>::Capability(const
Genode::Capability<FROM_RPC_INTERFACE, FROM_BCT>&) [with FROM_RPC_INTERFACE
= Genode::Session, FROM_BCT = Genode::Native_capability, RPC_INTERFACE =
Genode::Cpu_session, BCT = Genode::Native_capability]’
/home/tianc/git/omnios/genode-omnios/examples/thread-migration/src/app/32/..
/main.cc:18:   instantiated from here
/home/tianc/git/omnios/genode/base/include/base/capability.h:128: error:
invalid conversion from ‘Genode::Session*’ to ‘Genode::Cpu_session*’
make[3]: *** [../main.o] Error 1
make[2]: *** [thread-migration.prg] Error 2
make[1]: *** [gen_deps_and_build_targets] Error 2
make[1]: Leaving directory
`/home/tianc/git/omnios/build/genode-build-omnios'


I cannot figure out what's going on.

Best,
Chen

-----Original Message-----
From: Norman Feske [mailto:norman.feske at ...1...] 
Sent: Wednesday, June 01, 2011 9:41 PM
To: genode-main at lists.sourceforge.net
Subject: Re: Current genode release

Hi Daniel,

> Foc_cpu_session to build.  Question is, how do you introduce a new type 
> (e.g., struct) to be used as part of an RPC signature?  Do you have to 
> somewhere say how to marshal/unmarshal that type?

there are no special precautions needed. Any type can be used as RPC
argument as long as the following conditions are met:

* The type is self-sufficient, i.e., does not contain pointers and
  references

* The type has a default constructor

The in/out direction is steered by the 'const' qualifier used for
reference arguments and, if more flexibility is needed, by the
'Trait::Rpc_direction' type trait. For a more detailed explanation,
please have a look at the Section "Transferable argument types" of the
current release notes:

  http://genode.org/documentation/release-notes/11.05#section-4

Best regards
Norman

-- 
Dr.-Ing. Norman Feske
Genode Labs

http://www.genode-labs.com · http://genode.org

Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden
Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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