79 lines
1.6 KiB
C++
79 lines
1.6 KiB
C++
/*
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* \brief ROM dataspace utility
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* \author Norman Feske
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* \date 2012-01-09
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*/
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/*
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* Copyright (C) 2012 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__OS__ATTACHED_ROM_DATASPACE_H_
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#define _INCLUDE__OS__ATTACHED_ROM_DATASPACE_H_
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#include <rom_session/connection.h>
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#include <dataspace/client.h>
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#include <base/env.h>
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namespace Genode {
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class Attached_rom_dataspace
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{
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private:
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Rom_connection _rom;
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Rom_dataspace_capability _ds;
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size_t _size;
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void *_local_addr;
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public:
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/**
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* Constructor
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*
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* \throw Rom_connection::Rom_session_failed
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* \throw Rm_session::Attach_failed
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*/
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Attached_rom_dataspace(char const *name)
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:
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_rom(name),
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_ds(_rom.dataspace()),
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_size(Dataspace_client(_ds).size()),
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_local_addr(env()->rm_session()->attach(_ds))
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{ }
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/**
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* Destructor
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*/
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~Attached_rom_dataspace()
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{
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env()->rm_session()->detach(_local_addr);
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}
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/**
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* Return capability of the used ROM dataspace
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*/
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Rom_dataspace_capability cap() const { return _ds; }
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/**
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* Request local address
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*
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* This is a template to avoid inconvenient casts at
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* the caller. A newly allocated ROM dataspace is
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* untyped memory anyway.
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*/
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template <typename T>
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T *local_addr() { return static_cast<T *>(_local_addr); }
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/**
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* Return size
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*/
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size_t size() const { return _size; }
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};
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}
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#endif /* _INCLUDE__OS__ATTACHED_ROM_DATASPACE_H_ */
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