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61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
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/*
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* \brief Local capability
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* \author Norman Feske
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* \author Stefan Kalkowski
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* \date 2011-05-22
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*
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* A typed capability is a capability tied to one specifiec RPC interface
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*/
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/*
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* Copyright (C) 2011-2015 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__BASE_LINUX__CAPABILITY_H_
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#define _INCLUDE__BASE_LINUX__CAPABILITY_H_
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#include <base/capability.h>
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namespace Genode {
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template <typename> class Local_capability;
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}
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/**
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* Local capability referring to a specific RPC interface
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*
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* \param RPC_INTERFACE class containing the RPC interface declaration
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*/
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template <typename RPC_INTERFACE>
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class Genode::Local_capability
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{
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public:
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/**
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* Factory method to construct a local-capability.
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*
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* Local-capabilities can be used protection-domain internally
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* only. They simply incorporate a pointer to some process-local
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* object.
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*
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* \param ptr pointer to the corresponding local object.
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* \return a capability that represents the local object.
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*/
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static Capability<RPC_INTERFACE> local_cap(RPC_INTERFACE* ptr) {
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Untyped_capability cap(Cap_dst_policy::Dst(), (long)ptr);
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return reinterpret_cap_cast<RPC_INTERFACE>(cap); }
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/**
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* Dereference a local-capability.
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*
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* \param c the local-capability.
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* \return pointer to the corresponding local object.
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*/
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static RPC_INTERFACE* deref(Capability<RPC_INTERFACE> c) {
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return reinterpret_cast<RPC_INTERFACE*>(c.local_name()); }
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};
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#endif /* _INCLUDE__BASE_LINUX__CAPABILITY_H_ */
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