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d71f0a9606
This patch alleviates the need for a Native_capability::Dst at the API level. The former use case of this type as argument to Deprecated_env::reinit uses the opaque Native_capability::Raw type instead. The 'Raw' type contains the portion of the capability that is transferred as-is when delegating the capability (i.e., when installing the parent capability into a new component, or when installing a new parent capability into a new forked Noux process). This information can be retrieved via the new Native_capability::raw method. Furthermore, this patch moves the functions for retriving the parent capability to base/internal/parent_cap.h, which is meant to be implemented in platform-specific ways. It replaces the former set of startup/internal/_main_parent_cap.h headers. Issue #1993
92 lines
1.8 KiB
C++
92 lines
1.8 KiB
C++
/*
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* \brief Native capability of base-hw
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* \author Stefan Kalkowski
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* \date 2015-05-15
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*/
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/*
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* Copyright (C) 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__NATIVE_CAPABILITY_H_
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#define _INCLUDE__BASE__NATIVE_CAPABILITY_H_
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/* Genode includes */
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#include <kernel/interface.h>
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#include <base/stdint.h>
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namespace Genode { class Native_capability; }
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class Genode::Native_capability
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{
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public:
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using Dst = Kernel::capid_t;
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private:
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Dst _dst;
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void _inc() const;
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void _dec() const;
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public:
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struct Raw { };
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/**
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* Create an invalid capability
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*/
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Native_capability() : _dst(Kernel::cap_id_invalid()) { }
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/**
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* Create a capability out of a kernel's capability id
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*/
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Native_capability(Kernel::capid_t dst) : _dst(dst) { _inc(); }
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/**
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* Create a capability from another one
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*/
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Native_capability(const Native_capability &o) : _dst(o._dst) { _inc(); }
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~Native_capability() { _dec(); }
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/**
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* Returns true if it is a valid capability otherwise false
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*/
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bool valid() const { return (_dst != Kernel::cap_id_invalid()); }
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/*****************
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** Accessors **
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*****************/
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addr_t local_name() const { return _dst; }
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Dst dst() const { return _dst; }
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/**************************
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** Operator overloads **
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**************************/
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bool operator==(const Native_capability &o) const {
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return _dst == _dst; }
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Native_capability& operator=(const Native_capability &o)
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{
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if (this == &o) return *this;
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_dec();
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_dst = o._dst;
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_inc();
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return *this;
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}
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Raw raw() const { return Raw(); }
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};
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#endif /* _INCLUDE__BASE__NATIVE_CAPABILITY_H_ */
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