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109 lines
1.9 KiB
C++
109 lines
1.9 KiB
C++
/*
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* \brief Capability type
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* \author Norman Feske
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* \date 2016-07-15
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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__NATIVE_CAPABILITY_H_
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#define _INCLUDE__BASE__NATIVE_CAPABILITY_H_
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#include <base/stdint.h>
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#include <base/output.h>
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#include <base/exception.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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struct Reference_count_overflow : Exception { };
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/*
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* Platform-specific raw information of the capability that is
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* transferred as-is when the capability is delegated.
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*/
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struct Raw { unsigned long v[4]; };
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/**
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* Forward declaration of the platform-specific internal capability
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* representation
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*/
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class Data;
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private:
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Data *_data = nullptr;
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protected:
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void _inc();
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void _dec();
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public:
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/**
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* Default constructor creates an invalid capability
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*/
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Native_capability();
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/**
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* Copy constructor
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*/
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Native_capability(const Native_capability &other)
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: _data(other._data) { _inc(); }
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/**
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* Construct capability manually
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*
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* This constructor is used internally.
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*
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* \noapi
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*/
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Native_capability(Data *data) : _data(data) { _inc(); }
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/**
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* Destructor
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*/
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~Native_capability() { _dec(); }
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Data const *data() const { return _data; }
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/**
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* Overloaded comparison operator
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*/
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bool operator == (const Native_capability &o) const
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{
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return _data == o._data;
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}
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Native_capability& operator = (const Native_capability &o)
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{
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if (this == &o)
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return *this;
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_dec();
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_data = o._data;
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_inc();
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return *this;
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}
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long local_name() const;
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bool valid() const;
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Raw raw() const;
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void print(Output &) const;
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};
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#endif /* _INCLUDE__BASE__NATIVE_CAPABILITY_H_ */
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