109 lines
1.9 KiB
C++
109 lines
1.9 KiB
C++
/*
|
|
* \brief Capability type
|
|
* \author Norman Feske
|
|
* \date 2016-07-15
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2016-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__BASE__NATIVE_CAPABILITY_H_
|
|
#define _INCLUDE__BASE__NATIVE_CAPABILITY_H_
|
|
|
|
#include <base/stdint.h>
|
|
#include <base/output.h>
|
|
#include <base/exception.h>
|
|
|
|
namespace Genode { class Native_capability; }
|
|
|
|
|
|
class Genode::Native_capability
|
|
{
|
|
public:
|
|
|
|
struct Reference_count_overflow : Exception { };
|
|
|
|
/*
|
|
* Platform-specific raw information of the capability that is
|
|
* transferred as-is when the capability is delegated.
|
|
*/
|
|
struct Raw { unsigned long v[4]; };
|
|
|
|
/**
|
|
* Forward declaration of the platform-specific internal capability
|
|
* representation
|
|
*/
|
|
class Data;
|
|
|
|
private:
|
|
|
|
Data *_data = nullptr;
|
|
|
|
protected:
|
|
|
|
void _inc();
|
|
void _dec();
|
|
|
|
public:
|
|
|
|
/**
|
|
* Default constructor creates an invalid capability
|
|
*/
|
|
Native_capability();
|
|
|
|
/**
|
|
* Copy constructor
|
|
*/
|
|
Native_capability(const Native_capability &other)
|
|
: _data(other._data) { _inc(); }
|
|
|
|
/**
|
|
* Construct capability manually
|
|
*
|
|
* This constructor is used internally.
|
|
*
|
|
* \noapi
|
|
*/
|
|
Native_capability(Data *data) : _data(data) { _inc(); }
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
~Native_capability() { _dec(); }
|
|
|
|
Data const *data() const { return _data; }
|
|
|
|
/**
|
|
* Overloaded comparison operator
|
|
*/
|
|
bool operator == (const Native_capability &o) const
|
|
{
|
|
return _data == o._data;
|
|
}
|
|
|
|
Native_capability& operator = (const Native_capability &o)
|
|
{
|
|
if (this == &o)
|
|
return *this;
|
|
|
|
_dec();
|
|
_data = o._data;
|
|
_inc();
|
|
return *this;
|
|
}
|
|
|
|
long local_name() const;
|
|
|
|
bool valid() const;
|
|
|
|
Raw raw() const;
|
|
|
|
void print(Output &) const;
|
|
};
|
|
|
|
#endif /* _INCLUDE__BASE__NATIVE_CAPABILITY_H_ */
|