72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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* \brief Component-local implementation of the parent interface
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* \author Norman Feske
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* \date 2016-04-29
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*
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* On Linux, we intercept the parent interface to implement services that are
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* concerned with virtual-memory management locally within the component.
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*/
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/*
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* Copyright (C) 2016-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__BASE__INTERNAL__LOCAL_PARENT_H_
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#define _INCLUDE__BASE__INTERNAL__LOCAL_PARENT_H_
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/* Genode includes */
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#include <base/allocator.h>
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/* base-internal includes */
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#include <base/internal/expanding_parent_client.h>
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namespace Genode {
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struct Local_session;
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class Local_parent;
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}
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/**
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* Local interceptor of parent requests
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*
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* On Linux, we need to intercept calls to the parent interface to implement
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* the RM service locally. This particular service is used for creating managed
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* dataspaces, which allow the reservation of parts of the local address space
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* from being automatically managed by the 'env()->rm_session()'.
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*
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* All requests that do not refer to the RM service are passed through the real
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* parent interface.
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*/
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class Genode::Local_parent : public Expanding_parent_client
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{
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private:
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Allocator &_alloc;
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Id_space<Client> _local_sessions_id_space { };
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public:
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/**********************
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** Parent interface **
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**********************/
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Session_capability session(Client::Id, Service_name const &, Session_args const &,
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Affinity const & = Affinity()) override;
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Close_result close(Client::Id) override;
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/**
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* Constructor
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*
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* \param parent_cap real parent capability used to
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* promote requests to non-local
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* services
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*/
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Local_parent(Parent_capability parent_cap, Allocator &);
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};
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#endif /* _INCLUDE__BASE__INTERNAL__LOCAL_PARENT_H_ */
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