fa377f0df5
Introduce a factory-, and dereference method for local capabilities. These are capabilities that reference objects of services, which are known to be used protection-domain internally only. To support the new Capability class methods a protected constructor and accessor to the local object's pointer is needed in the platform's capability base-classes. For further discussion details please refer issue #139.
94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
/*
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* \brief Platform-specific type definitions
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* \author Norman Feske
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2012 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__BASE__NATIVE_TYPES_H_
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#define _INCLUDE__BASE__NATIVE_TYPES_H_
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namespace Genode {
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typedef volatile int Native_lock;
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struct Native_thread
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{
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int ec_sel; /* NOVA cap selector for execution context */
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int sc_sel; /* NOVA cap selector for scheduling context */
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int rs_sel; /* NOVA cap selector for running semaphore */
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int pd_sel; /* NOVA cap selector of protection domain */
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int exc_pt_sel; /* base of event portal window */
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};
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typedef Native_thread Native_thread_id;
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inline bool operator == (Native_thread_id t1, Native_thread_id t2) { return t1.ec_sel == t2.ec_sel; }
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inline bool operator != (Native_thread_id t1, Native_thread_id t2) { return t1.ec_sel != t2.ec_sel; }
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class Native_utcb
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{
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private:
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/**
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* Size of the NOVA-specific user-level thread-control block
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*/
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enum { UTCB_SIZE = 4096 };
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/**
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* User-level thread control block
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*
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* The UTCB is one 4K page, shared between the kernel and the
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* user process. It is not backed by a dataspace but provided
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* by the kernel.
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*/
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long _utcb[UTCB_SIZE/sizeof(long)];
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};
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class Native_capability
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{
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private:
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int _pt_sel;
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int _unique_id;
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protected:
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Native_capability(void* ptr) : _unique_id((int)ptr) {}
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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() : _pt_sel(0), _unique_id(0) { }
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/**
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* Construct capability manually
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*
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* This constructor should be called only from the platform-specific
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* part of the Genode framework.
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*/
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Native_capability(int pt_sel, int unique_id)
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: _pt_sel(pt_sel), _unique_id(unique_id) { }
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bool valid() const { return _pt_sel != 0 && _unique_id != 0; }
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int local_name() const { return _unique_id; }
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void* local() const { return (void*)_unique_id; }
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int dst() const { return _pt_sel; }
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int unique_id() const { return _unique_id; }
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int pt_sel() const { return _pt_sel; }
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};
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typedef int Native_connection_state;
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}
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#endif /* _INCLUDE__BASE__NATIVE_TYPES_H_ */
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